学生信息录入系统源码

❶ c语言学生成绩管理系统1000行源代码

/*首次使用，新建score.in文件，在里面打入0
可用程序
#include<stdio.h>
FILE *fin
main()
{
fin=fopen("score.in","r");
fprintf(fin,"0");
return 0;
}
完成
*/
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<windows.h>
#include<time.h>
#define n 999
FILE *fin;
main()
{
int a[n]={0},ori=0,i=0,b=0,add[n]={0},con=0,orix[n]={0},t=0,te[n]={0},TRUEt,ixi,fx,abc=0,sum,TURE,xx;
long long f[n]={0},tex[n]={0};
printf("\n\n\n\n\n\n\n\n\n\n\n\t\t\t\t\t\t学生成绩管理系统\n\t\t\t\t\t\t Please wait...");
Sleep(2000);system("cls");
int xp,xi;
fin=fopen("score.in","r+");
fscanf(fin,"%d",&xp);
i=xp;
for(xi=1;xi<=xp;xi++)
{fscanf(fin,"%d%d%d",&f[xi],&a[xi],&te[xi]);te[xi]--;
printf("Id:%lld score:%d ranking:%d\n",f[xi],a[xi],te[xi]+1);
add[xi]=xi;orix[xi]=a[xi];
}
fclose(fin);
int TRUE1;
pe:
while(1)
{ TRUE1=1;i++;
printf("Id(输入-1:删除,输入-2:修改成绩,输入-3:删除所有内容,输入-4:保存到score.in并退出):");
scanf("%lld",&f[i]);
for(sum=1;sum<i;sum++)
if(f[sum]==f[i])
{system("cls");for(con=1;con<=i;con++) {if(a[con]==0)continue;printf("Id:%lld score:%d ranking:%d\n",f[con],a[con],te[con]+1);}TRUE1=0;i--;printf("Error with two same id.\n");continue;}
if(TRUE1==0)
continue;
if(f[i]==-3)
{int r;
for(r=0;r<n;r++)
{
a[r]=0;ori=0;i=0;b=0;add[r]=0;con=0;orix[r]=0;t=0;te[r]=0;abc=0;
f[r]=0;tex[r]=0;
}
system("cls");
goto pe;
}
if(f[i]==-2)
{TURE=0;i--;
system("cls");
for(con=1;con<=i;con++)
{if(a[con]==0)continue; printf("Id:%lld score:%d ranking:%d\n",f[con],a[con],te[con]+1);}
printf("修改学号_____________号的分数.\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b",f[con],a[con],te[con]+1);
scanf("%d",&xx);
for(sum=1;sum<=i;sum++)
if(f[sum]==xx)
{
TURE=1;
printf("\n修改为___________.\b\b\b\b\b\b\b\b\b\b\b\b");
scanf("%d",&a[sum]);
printf("\n修改成功！将在下一次输入后更新名次。\n\n");
continue;
}
if(TURE==0)
printf("No id is %d\n",xx);
continue;
}
if(f[i]==-4)
{
i--;
fin=fopen("score.in","r+");
fprintf(fin,"%d\n",i);
for(xi=1;xi<=i;xi++)fprintf(fin,"%d %d %d\n",f[xi],a[xi],te[xi]+1);
for(xi=i+1;xi<=xp;xi++)fprintf(fin," \n");
fclose(fin);
return 0;
}
if(f[i]==-1)
{TRUEt=0;
system("cls");
i--;
for(con=1;con<=i;con++){if(a[con]==0)continue;printf("Id:%lld score:%d ranking:%d\n",f[con],a[con],te[con]+1);}
printf("删除学号_____________号.\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
scanf("%lld",&fx);
for(con=1;con<=i;con++)
if(f[con]==fx)
{TRUEt=1;abc++;
f[con]=0;
a[con]=0;
tex[abc]=te[con];
for(ixi=1;ixi<=i;ixi++)
if(te[ixi]>te[con])
te[ixi]--;
te[con]=0;
break;}
system("cls");
for(con=1;con<=i;con++){
if(a[con]==0)continue;
printf("Id:%lld score:%d ranking:%d\n",f[con],a[con],te[con]+1);}
if(TRUE==0)
printf("No Id is %lld\n",fx);
continue;
}
system("cls");
for(con=1;con<i;con++)
{if(a[con]==0)continue; printf("Id:%lld score:%d ranking:%d\n",f[con],a[con],te[con]+1);}
printf("Id:%lld score:",f[i]);
scanf("%d",&ori);system("cls");
a[i]=ori;add[i]=i;orix[i]=a[i];
system("cls");
for(b=1;b<=i;b++)
for(con=i;con>=b;con--)
if(orix[con]>orix[con-1])
{t=orix[con];orix[con]=orix[con-1];orix[con-1]=t;
t=add[con];add[con]=add[con-1];add[con-1]=t;}
for(con=1;con<=i;con++) te[add[con]]=con;
for(con=1;con<=abc;con++)
for(ixi=1;ixi<=i;ixi++)
if(te[ixi]>tex[con])
te[ixi]--;
if(te[i]==te[i-1])te[i]=0;
for(con=1;con<=i;con++)
{if(a[con]==0)continue;printf("Id:%lld score:%d ranking:%d\n",f[con],a[con],te[con]+1);}
}
return 0;
}
//求采纳

❷ 学生信息管理系统C＋＋源代码

#include<iostream>
#include<stdlib.h>
#include<string.h>
#include<malloc.h>
#define INIT_SIZE 10
#define INCRE_SIZE 10
#define SUBJECT_NUM 3
#define LEN 3

void show_Start();

void show_Table();

void addRecord();

void Info_delete();
void deleteRecord();
void delete_Num(int);
void delete_Name(char tarName[]);

void Info_modify();
void modifyRecord();
void modify_Num(int);
void modify_Name(char[]);

void Info_query();
void queryRecord();
void query_Num(int);
void query_Name(char[]);

void display();

void quit();

void menu_CMD();

char *subject[SUBJECT_NUM] = {"高代","数分","C语言"};

struct STUDENT
{
int num;
char name[20];
char sex;
float score[SUBJECT_NUM];
};

//struct STUDENT stu[LEN + 1];

//STUDENT *record = (STUDENT*)malloc(sizeof(STUDENT)*INIT_SIZE);

int static stuNum = 0;
//先暂时定义三个学生吧...

STUDENT *record = (STUDENT*)malloc(sizeof(STUDENT)*INIT_SIZE);;

int main()
{
//record = (STUDENT*)malloc(sizeof(STUDENT)*INIT_SIZE);
//STUDENT *record = (STUDENT*)malloc(sizeof(STUDENT)*INIT_SIZE);

/*
record[1].num = 1001;
strcpy(record[1].name,"Jason");
record[1].sex = 'M';
record[1].score[0] = 85.0;
record[1].score[1] = 90.0;
record[1].score[2] = 95.0;

record[2].num = 1002;
strcpy(record[2].name,"Jerry");
record[2].sex = 'M';
record[2].score[0] = 85.0;
record[2].score[1] = 90.0;
record[2].score[2] = 95.0;

record[3].num = 1003;
strcpy(record[3].name,"Jessie");
record[3].sex = 'F';
record[3].score[0] = 85.0;
record[3].score[1] = 90.0;
record[3].score[2] = 95.0;
*/

/*
Info_modify();
int key;
cout<<"请输入您的选择 : ";
cin>>key;

if(key == 1)
{
int targetNum;
cout<<"请输入您欲修改的学生的学号 : ";
cin>>targetNum;

modify_Num(targetNum);
cout<<endl;

display();
}

if(key == 2)
{
char targetName[20];
cout<<"请输入您欲修改学生的姓名 : ";
cin>>targetName;

modify_Name(targetName);
cout<<endl;

display();
}

if(key == 3)
{
exit(0);
}
*/

show_Start();

menu_CMD();

return 0;

}

//修改完后还应该显示
void show_Start()
{
//cout<<endl;
cout<<" **************************************** "<<endl;
cout<<" 这是一个 "<<endl;
cout<<" 学生成绩管理系统 "<<endl;
cout<<" 可以对学生成绩进行管理 "<<endl;
cout<<" 欢迎大家使用 "<<endl;
cout<<" Made by Jason "<<endl;
cout<<" **************************************** "<<endl;
}

// 显示表头信息,即是 : 学号,姓名,性别,高代,数分,C语言.
void show_Table()
{
cout<<"学号"<<"\t"<<"姓名"<<"\t"<<"性别";
cout<<"\t"<<subject[0]<<"\t"<<subject[1]<<"\t"<<subject[2];
cout<<endl;
}

void menu_CMD()
{
int key;
while(1)
{
cout<<"1. 增加学生信息"<<endl;
cout<<"2. 删除学生信息"<<endl;
cout<<"3. 修改学生信息"<<endl;
cout<<"4. 查询学生信息"<<endl;
cout<<"5. 显示学生信息"<<endl;
cout<<"6. 退出"<<endl;
cout<<"请输入您的选择 : ";
cin>>key;
while(1)
{
if((key < 1)||(key > 6))
{
int key;
cout<<"您的输入有误,请重新输入!"<<endl;
cout<<"请选(1 - 5) : ";
cin>>key;
}
else
{
break;
}
}
switch(key)
{
case 1:
addRecord();
break;
case 2:
deleteRecord();
break;
case 3:
modifyRecord();
break;
case 4:
queryRecord();
break;
case 5:
display();
break;
case 6:
quit();
break;
}

}
}

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////

//增加学生信息
void addRecord()
{

if(stuNum == 0)
{
cout<<"原来没有记录,现在建立新表!"<<endl;
stuNum++;
}
else
{
cout<<"现在在当前表的末尾添加新的信息!"<<endl;
stuNum++;
}

//如果数组空间不够,重新申请空间
if(stuNum > INIT_SIZE)
{
cout<<"内存空间不够,现在重新申请新的内存空间!"<<endl;
record = (STUDENT*)realloc(record,(INIT_SIZE + INCRE_SIZE)*sizeof(STUDENT));
cout<<"空间申请完成!"<<endl;
}

cout<<"您现在要添加一组新的信息,您确定吗?"<<endl;
cout<<"请输入您的选择(Y/N) : ";
char choi;
cin>>choi;
if((choi == 'Y')||(choi == 'y'))
{
cout<<"请输入学号 : ";
cin>>record[stuNum].num;
cout<<"请输入姓名 : ";
cin>>record[stuNum].name;
cout<<"请输入性别(M为男,F为女) : ";
cin>>record[stuNum].sex;

int i;
for(i = 0;i < SUBJECT_NUM;i++)
{
cout<<"请输入"<<subject[i]<<"的成绩 : ";
cin>>record[stuNum].score[i];
}
}

if((choi == 'N')||(choi == 'n'))
{
cout<<"退出添加新学生信息!"<<endl;
cout<<endl;
}

cout<<"现在已经有"<<stuNum<<"条学生的信息了!"<<endl;
cout<<endl;
}

//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//删除信息 晚上完成...

//显示deleteRecord的表头信息
void Info_delete()
{
cout<<"请输入删除方式 : "<<endl;
cout<<"1. 按学号删除"<<endl;
cout<<"2. 按姓名删除"<<endl;
cout<<"3. 退出删除"<<endl;
}

//删除学生的信息,包含两个子函数
void deleteRecord()
{
int key;
cout<<endl;
Info_delete();
cout<<"请输入您的选择 : ";
cin>>key;

if(key == 1)
{
int targetNum;
cout<<"请输入您欲删除学生的学号 : ";
cin>>targetNum;

//按学号删除
delete_Num(targetNum);
cout<<endl;
}

if(key == 2)
{
char targetName[20];
cout<<"请输入您欲删除学生的姓名 : ";
cin>>targetName;

//按姓名删除
delete_Name(targetName);
cout<<endl;
}

if(key == 3)
{
while(1)
{
menu_CMD();

}
}
}

//按学号删除学生信息
//只用完成删除操作,而不必输出. 输出的操作可以在主菜单中进行

void delete_Num(int tarNum)
{
int i;
for(i = 1;i <= stuNum;i++)
{
if(record[i].num == tarNum)
{
//删除还要分两种情况讨论
//1. 欲删除的学生信息是最后一位
//2. 欲删除的学生信息不是最后一位

//第一种情况,欲删除的学生是最后一位
if(i = stuNum)
{
cout<<"您所要删除的学生信息是 : "<<endl;
show_Table();
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex<<"\t"
<<record[i].score[0]<<record[i].score[1]<<"\t"<<record[i].score[2];
cout<<endl;

cout<<endl<<"删除后学生信息表为 : "<<endl;
show_Table();
for(int i = 1;i <= stuNum - 1;i++)
{
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
for(int j = 0;j < SUBJECT_NUM;j++)
{
cout<<"\t"<<record[i].score[j];
}
cout<<endl;
}
//显示信息应该放在后面
/*
stuNum--;
cout<<"现在还剩下"<<stuNum<<"条学生的信息";
cout<<endl;
*/
}

//2.第二种情况,欲删除的学生不是最后一位
if(i != stuNum)
{

cout<<"您所要删除的学生信信息是 : "<<endl;
show_Table();
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex<<"\t"
<<record[i].score[0]<<"\t"<<record[i].score[1]<<"\t"<<record[i].score[2];

for(int j = i+1;j <= stuNum;j++)
{
record[j-1] = record[j];
}

//接着完成输出

cout<<endl;
cout<<"删除后学生信息表为 : "<<endl;
show_Table();
for(int i = 1;i <= stuNum-1;i++)
{
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
for(int j = 0;j < SUBJECT_NUM;j++)
{
cout<<"\t"<<record[i].score[j];
}
cout<<endl;
}
/*
stuNum--;
cout<<"现在还剩下"<<stuNum<<"条学生的信息";
cout<<endl;
*/
}

stuNum--;
cout<<"现在还是剩下"<<stuNum<<"条学生的信息";
cout<<endl;
}
}
}

/*

//方法同上
void delete_Name(char tarName[])
{
int i;
for(i = 1;i <= stuNum;i++)
{
if(strcmp(record[i].name,tarName) == 0)
{
//删除还要分两种情况讨论
//1. 欲删除的学生信息是最后一位
//2. 欲删除的学生信息不是最后一位

//第一种情况 : 欲删除学生是最后一位
if(i = stuNum)
{
cout<<"您所要删除的学生信息是 : "<<endl;
show_Table();
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex<<"\t"
<<record[i].score[0]<<record[i].score[1]<<"\t"<<record[i].score[2];
cout<<endl;

cout<<endl<<"删除后学生信息表为 : "<<endl;
show_Table();
for(int i = 1;i <= stuNum - 1;i++)
{
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
for(int j = 0;j < SUBJECT_NUM;j++)
{
cout<<"\t"<<record[i].score[j];
}
cout<<endl;
}
}

//第二种情况 : 欲删除学生不是最后一位
if(i != stuNum)
{

cout<<"您所要删除的学生信信息是 : "<<endl;
show_Table();
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex<<"\t"
<<record[i].score[0]<<"\t"<<record[i].score[1]<<"\t"<<record[i].score[2];

//整体往前 前移一位
for(int j = i+1;j <= stuNum;j++)
{
record[j-1] = record[j];
}
cout<<endl;

//接着完成输出
cout<<"删除后学生信息表为 : "<<endl;
show_Table();
for(int i = 1;i <= stuNum-1;i++)
{
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
for(int j = 0;j < SUBJECT_NUM;j++)
{
cout<<"\t"<<record[i].score[j];
}
cout<<endl;
}

cout<<endl;
}
}

}

}

*/

void delete_Name(char tarName[])
{
int i;
for(i = 1;i <= stuNum;i++)
{

//删除还要分两种情况讨论
//1. 欲删除的学生信息是最后一位
//2. 欲删除的学生信息不是最后一位

//当欲删除的学生是最后一位,直接输出前面LEN-1位学生的信息

if(strcmp(record[i].name,tarName) == 0)
{
if(i == stuNum)
{
cout<<"您所要删除的学生信息是 : "<<endl;
show_Table();
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex<<"\t"
<<record[i].score[0]<<"\t"<<record[i].score[1]<<"\t"<<record[i].score[2];

cout<<endl;

cout<<"删除后学生信息表为 : "<<endl;
show_Table();
for(int i = 1;i <= stuNum-1;i++)
{
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
for(int j = 0;j < SUBJECT_NUM;j++)
{
cout<<"\t"<<record[i].score[j];
}
cout<<endl;
}
/*
stuNum--;
cout<<"现在还剩下"<<stuNum<<"条学生的信息";
cout<<endl;
*/
}

//当欲删的学生不是最后一位,整体往前前移一位
if(i != stuNum)
{
cout<<"您所要删除的学生信息是 : "<<endl;

show_Table();
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex<<"\t";
cout<<record[i].score[0]<<"\t"<<record[i].score[1]<<"\t"<<record[i].score[2];
cout<<endl;

//整体往前前移一位
for(int j = i+1;j <= stuNum;j++)
{
record[j-1] = record[j];
}

//然后输出
cout<<endl;
cout<<"删除后学生信息表为 : "<<endl;

show_Table();
for(int i = 1;i <= stuNum-1;i++)
{
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
for(int j = 0;j < SUBJECT_NUM;j++)
{
cout<<"\t"<<record[i].score[j];
}
cout<<endl;
}
/*
stuNum--;
cout<<"现在还剩下"<<stuNum<<"条学生的信息";
cout<<endl;
*/
}

stuNum--;
cout<<"现在还剩下"<<stuNum<<"条学生的信息";
cout<<endl;
}
}
}

/*****************************************************************************
******************************************************************************/

//显示modifyRecord的表头信息
void Info_modify()
{
cout<<"请输入修改方式 : "<<endl;
cout<<"1. 按学号修改"<<endl;
cout<<"2. 按姓名修改"<<endl;
cout<<"3. 退出修改"<<endl;
}

//查询学生的成绩,当然里面包括两个子函数
void modifyRecord()
{
int key;
cout<<endl;
Info_modify();
cout<<"请输入您的选择 : ";
cin>>key;

//按学号修改
if(key == 1)
{
int targetNum;
cout<<"请输入您欲修改的学生的学号 : ";
cin>>targetNum;

modify_Num(targetNum);
cout<<endl;

//display();
}

//按姓名修改
if(key == 2)
{
char targetName[20];
cout<<"请输入您欲修改学生的姓名 : ";
cin>>targetName;

modify_Name(targetName);
cout<<endl;

//display();
}

//退出修改
if(key == 3)
{
while(1)
{
menu_CMD();
}
}
}

//按学号修改
void modify_Num(int tarNum)
{
int i;
for(i = 1;i <= stuNum;i++)
{
if(record[i].num == tarNum)
{
cout<<endl<<"请修改该学生的信息"<<endl;
cout<<"请输入该学生的学号 : ";
cin>>record[i].num;
cout<<"请输入该学生的姓名 : ";
cin>>record[i].name;
cout<<"请输入该学生的性别 : ";
cin>>record[i].sex;
cout<<"请输入"<<subject[0]<<"的成绩 : ";
cin>>record[i].score[0];
cout<<"请输入"<<subject[1]<<"的成绩 : ";
cin>>record[i].score[1];
cout<<"请输入"<<subject[2]<<"的成绩 : ";
cin>>record[i].score[2];
}
}
}

//按姓名修改
void modify_Name(char tarName[])
{
int i;
for(i = 1;i <= stuNum;i++)
{
if(strcmp(record[i].name,tarName) == 0)
{
cout<<endl<<"请修改该学生的信息 : "<<endl;
cout<<"请输入该学生的学号 : ";
cin>>record[i].num;
cout<<"请输入该学生的姓名 : ";
cin>>record[i].name;
cout<<"请输入该学生的性别 : ";
cin>>record[i].sex;
cout<<"请输入"<<subject[0]<<"的成绩 : ";
cin>>record[i].score[0];
cout<<"请输入"<<subject[1]<<"的成绩 : ";
cin>>record[i].score[1];
cout<<"请输入"<<subject[2]<<"的成绩 : ";
cin>>record[i].score[2];
}
}
}

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////

//显示queryRecord的表头信息
void Info_query()
{
cout<<"请输入查询方式 : "<<endl;
cout<<"1. 按学号查询"<<endl;
cout<<"2. 按姓名查询"<<endl;
cout<<"3. 退出查询"<<endl;
}

//查询学生信息queryRecord
void queryRecord()
{
int key;
cout<<endl;
Info_query();
cout<<"请输入您的选择 : ";
cin>>key;

if(key == 1)
{
int targetNum;
cout<<"请输入您欲查询学生的学号 : ";
cin>>targetNum;

query_Num(targetNum);
cout<<endl;
}

if(key == 2)
{
char targetName[20];
cout<<"请输入您欲查询学生的学号 : ";
cin>>targetName;

query_Name(targetName);
cout<<endl;
}

//退出查询,退回到主菜单吧...
if(key == 3)
{
while(1)
{
menu_CMD();
}
}
}

//按学号查询
void query_Num(int tarNum)
{
int i;
for(i = 1;i <= stuNum;i++)
{
if(record[i].num == tarNum)
{
//如果表中有该学生信息的话,仅用输出该学生的信息即可.
//输出该学生的信息
cout<<"该学生的信息如下 : "<<endl;

//显示表头信息
show_Table();

//显示该学生具体的信息
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
cout<<"\t"<<record[i].score[0]<<"\t"<<record[i].score[1]<<"\t"<<record[i].score[2];
cout<<endl;
}
}
}

//按姓名查询
void query_Name(char tarName[])
{
int i;
for(i = 1;i <= stuNum;i++)
{
if(strcmp(record[i].name,tarName) == 0)
{
cout<<"该学生的信息如下 : "<<endl;

show_Table();

cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
cout<<"\t"<<record[i].score[0]<<"\t"<<record[i].score[1]<<"\t"<<record[i].score[2];
cout<<endl;
}
}
}

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////

//先显示所有学生的信息吧
//显示record里所有学生的成绩
void display()
{
show_Table();
int i,j;
for(i = 1;i <= stuNum;i++)
{
//cout<<"学号"<<"\t"<<"姓名"<<"\t"<<"性别";
cout<<record[i].num<<"\t"<<record[i].name<<"\t"<<record[i].sex;
for(j = 0;j < SUBJECT_NUM;j++)
{
cout<<"\t"<<record[i].score[j];
}
cout<<endl;
}
cout<<endl;
}

//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

//退出
void quit()
{
char choi;
cout<<"您确定要退出吗?"<<endl;
cout<<"请输入您的选择(Y/N) : ";
cin>>choi;
if((choi == 'Y')||(choi == 'y'))
{
cout<<"现在退出学生信息管理系统"<<endl;
exit(0);
}
//如果不是退出,则接着退回到主界面
else
{
cout<<endl;
menu_CMD();
}

}

这个是原创的... 在C-Free 4.0里跑过，可以正常运行
你可以试着跑一下，如果有什么问题可以和我联系

❸ 学生信息管理系统源代码

void Sort(student *&head, char type,char maxOrMin)
{
/*参数说明:
type=='1' 按 语文 排列
type=='2' 按 数学 排列
type=='3' 按 英语 排列
type=='4' 按 总分 排列
type=='5' 按 平均分 排列
type=='6' 按 座号 排列
*/
student *pHead,*pH;
pHead=pH=head;
int len=GetLength(head);
float *array=new float[len];
int i;
int x=0;

float num=0;

while(head)
{
Count(head);
if(type=='1')
{
num=head->chinaNum;
}
else if(type=='2')
{
num=head->mathNum;
}
else if(type=='3')
{
num=head->englishNum;
}
else if(type=='4')
{
num=head->result;
}
else if(type=='5')
{

num=head->average;
}
else if(type=='6')
{
num=head->num;
}
array[x]=num;
x++;
head=head->next;
}

head=pHead;
if(maxOrMin=='1')
{
for( i=1; i<len; i++)
{
for(int j=0; j<len-i; j++)
{
if(array[j]<array[j+1])
{
float num;
num=array[j];
array[j]=array[j+1];
array[j+1]=num;
}
}
}
}
else
{
for( i=1; i<len; i++)
{
for(int j=0; j<len-i; j++)
{
if(array[j]>array[j+1])
{
float num;
num=array[j];
array[j]=array[j+1];
array[j+1]=num;
}
}
}
}

int pos=1;

for(i=0; i<len; i++)
{
head=pHead;
while(head)
{
if(type=='1')
{
num=head->chinaNum;
}
else if(type=='2')
{
num=head->mathNum;
}
else if(type=='3')
{
num=head->englishNum;
}
else if(type=='4')
{
num=int(head->result);
}
else if(type=='5')
{
num=int(head->average);
}
else if(type=='6')
{
num=int(head->num);
}

int n=0;
if(int(array[i])==int(num))
{

if(int(array[i])!=int(array[i+1]))
{
if(n==0)
{
n=pos;
}
head->pos=pos;
pos++;
}
else
{

head->pos=n;
}
}
head=head->next;
}
}
head=pH;
delete []array;
}

void Count(student *&head)
{
head->result=head->chinaNum+head->englishNum+head->mathNum;
head->average=head->result/3;
}

void DeleteAll(student* &head)
{
student *cp,*np;

cp=head;
while(cp)
{
np=cp->next;
delete cp;
cp=np;
}
head=NULL;
}

void ChaXun(string str,student *head)
{
Sort(head,'4','1');
cout<<"欢迎使用查询功能"<<endl<<endl;
cout<<"请输入你要按什么查询 1->一般查询 2->查找最多 3->查找最少"<<endl;
string s;
cin>>s;
while(s[0]!='1'&&s[0]!='2'&&s[0]!='3')
{
cout<<"你输入错误,请重新输入."<<endl;
cin>>s;
}

if(s[0]=='1')
{
cout<<"按什么查询?"<<endl;
cout<<"1->姓名 2->座号 3->语文成绩 4->数学成绩 "
<<"5->英语成绩 6->总分 7->平均分 8->排名"<<endl;
cin>>str;

while(str[0]!='1' && str[0]!='2' &&
str[0]!='3' && str[0]!='4' &&
str[0]!='5' && str[0]!='6' &&
str[0]!='7' && str[0]!='8' )
{
cout<<"你输入错误,请重新输入."<<endl;
cin>>str;
}
char findStr[30];
cout<<"请输入要查找的关键字或关键数:"<<endl;
cin>>findStr;
switch(str[0])
{

case '1':
Find(head,findStr,'1');
break;
case '2':
Find(head,findStr,'2');
break;
case '3':
Find(head,findStr,'3');
break;
case '4':
Find(head,findStr,'4');
break;
case '5':
Find(head,findStr,'5');
break;
case '6':
Find(head,findStr,'6');
break;
case '7':
Find(head,findStr,'7');
break;
case '8':
Find(head,findStr,'8');
break;
}
}
else if(s[0]=='2')
{
cout<<"请输入要按什么查询?"<<endl;
cout<<"1->语文成绩 2->数学成绩 "
<<"3->英语成绩 4->总分 5->平均分 6->排名"<<endl;
string s;
cin>>s;
switch(s[0])
{
case '1':
FindMaxOrMin(head,'1','1');
break;
case '2':
FindMaxOrMin(head,'2','1');
break;
case '3':
FindMaxOrMin(head,'3','1');
break;
case '6':
FindMaxOrMin(head,'6','1');
break;
case '5':
FindMaxOrMin(head,'5','1');
break;
default:
FindMaxOrMin(head,'4','1');
break;
}
}
else if(s[0]=='3')
{
cout<<"请输入要按什么查询?"<<endl;
cout<<"1->语文成绩 2->数学成绩 "
<<"3->英语成绩 4->总分 5->平均分 6->排名"<<endl;
string s;
cin>>s;
switch(s[0])
{
case '1':
FindMaxOrMin(head,'1','2');
break;
case '2':
FindMaxOrMin(head,'2','2');
break;
case '3':
FindMaxOrMin(head,'3','2');
break;
case '6':
FindMaxOrMin(head,'6','2');
break;
case '5':
FindMaxOrMin(head,'5','2');
break;
default:
FindMaxOrMin(head,'4','2');
break;
}
}
}

void ZengJia(string str, student* &head)
{
student *pNew=new student;
cout<<"欢迎使用增加功能"<<endl<<endl;
cout<<"请输入新学生的名字 :"<<endl;
cin>>pNew->name;
cout<<"请输入新学生的座号 :"<<endl;
cin>>pNew->num;
cout<<"请输入他的语文分数 :"<<endl;
cin>>pNew->chinaNum;
cout<<"请输入他的数学分数"<<endl;
cin>>pNew->mathNum;
cout<<"请输入他的英语分数"<<endl;
cin>>pNew->englishNum;

cout<<"插入记录的 (1->最前面 2->最后面)"<<endl;
cin>>str;
while(str[0]!='1' && str[0]!='2')
{
cout<<"你输入错误,请重新输入."<<endl;
cout<<"插入记录的 (1->最前面 2->最后面)"<<endl;
cin>>str;
}
if(str[0]=='1')
{
InsertFront(head,pNew);
}
else if(str[0]=='2')
{
InsertRear(head,pNew);
}
cout<<"新学生增加成功."<<endl;

}

void ShanChu(string str, student *&head)
{
char delStr[30];
cout<<"欢迎使用删除功能"<<endl<<endl;
cout<<"1->查询删除 2->全部删除"<<endl;
cin>>str;
while(str[0]!='1' && str[0]!='2')
{
cout<<"输入错误,请重新输入."<<endl;
cin>>str;
}
if(str[0]=='1')
{
cout<<"请输入要删除的关键字"<<endl;
cin>>delStr;
cout<<"1->删除第一条找到的记录 2->删除所有找到的记录"<<endl;
cin>>str;
while(str[0]!='1'&&str[0]!='2')
{
cout<<"你输入错误,请重新输入."<<endl;
cin>>str;
}
cout<<"你真的要删除吗? 1->删除 2->取消"<<endl;
string s;
cin>>s;
if(str[0]=='1')
{
if(str[0]=='1')
{
Delete(head,delStr,1);

}
else
{
Delete(head,delStr,2);
}
}
else
{
cout<<"你已经取消删除了."<<endl;
}
}
else
{
cout<<"你真的要删除全部数据吗?这样会使你的数据全部丢失哦."<<endl;
cout<<"1->全部删除 2->取消删除"<<endl;
cin>>str;
if(str[0]=='1')
{
DeleteAll(head);
}
else
{
cout<<"你已经取消删除了."<<endl;
}
}

}

void PaiMing(string str, student* head)
{
string s;
cout<<"欢迎使用排名功能"<<endl<<endl;
cout<<"排名选择: 1->升序 2->降序"<<endl;
cin>>s;
cout<<"请输入要按什么排名?"<<endl;
cout<<"1->语文成绩 2->数学成绩 3->英语成绩 "
<<"4->总分 5->平均分 6->座号"<<endl;

cin>>str;

while(str[0]!='1' && str[0]!='2' &&
str[0]!='3' && str[0]!='4' &&
str[0]!='5' && str[0]!='6' )
{
cout<<"你输入错误,请重新输入."<<endl;
cin>>str;
}
cout<<"姓名:"<<setw(8)<<"座号:"<<setw(10)
<<"语文分数:"<<setw(10) <<"数学分数:"
<<setw(10)<<"英语分数:"<<setw(8)<<"总分数:"
<<setw(8)<<"平均分:"<<setw(6)<<"名次:"<<endl<<endl;
if(s[0]=='2')
{
switch(str[0])
{

case '1':
Sort(head,'1','1');
break;
case '2':
Sort(head,'2','1');
break;
case '3':
Sort(head,'3','1');
break;
case '4':
Sort(head,'4','1');
break;
case '5':
Sort(head,'5','1');
break;
case '6':
Sort(head,'6','1');
break;
}
}
else
{

switch(str[0])
{

case '1':
Sort(head,'1','2');
break;
case '2':
Sort(head,'2','2');
break;
case '3':
Sort(head,'3','2');
break;
case '4':
Sort(head,'4','2');
break;
case '5':
Sort(head,'5','2');
break;
case '6':
Sort(head,'6','2');
break;
}

}
ShowList(head);
return ;
}

void XianShi(string str, student *head)
{
Sort(head,'4','1');

string s;
cout<<"欢迎使用显示功能"<<endl;
cout<<"1->显示全部记录 2->显示记录数目"<<endl;
cin>>s;
if(s[0]=='2')
{
cout<<"记录的数目是:"<<GetLength(head)<<endl;
}
else
{
ShowList(head);
}
}

void XuiGai(string str, student *&head)
{
string s;
student *std;
cout<<"欢迎使用修改功能"<<endl;

cout<<"请输入你要按什么查询"<<endl;
cout<<"1->姓名 2->座号 3->语文成绩 4->数学成绩 "
<<"5->英语成绩 "<<endl;
cin>>str;

while(str[0]!='1' && str[0]!='2' &&
str[0]!='3' && str[0]!='4' &&
str[0]!='5' )
{
cout<<"你输入错误,请重新输入."<<endl;
cin>>str;
}
char findStr[30];
cout<<"请输入要查找的关键字或关键数:"<<endl;
cin>>findStr;
switch(str[0])
{

case '1':
std=Find(head,findStr,'1');
Reword(std);
break;
case '2':
std=Find(head,findStr,'2');
Reword(std);
break;
case '3':
std=Find(head,findStr,'3');
Reword(std);
break;
case '4':
std=Find(head,findStr,'4');
Reword(std);
break;
case '5':
std=Find(head,findStr,'5');
Reword(std);
break;
}
Write(head);
if(std!=NULL)
{
cout<<"修改成功."<<endl;
}
}

int Run()
{

bool isLoad=false;
student* head=NULL;
student *pNew=new student;
head=Read();
SetTitle(false);
if(head!=NULL)
{ Sort(head,'5','1');
Count(head);

}
string str;
SetTitle(false);

cout<<" 欢迎使用学生管理系统 "<<endl<<endl;

cout<<" 1->用户登陆 2->退出程序 "<<endl;
cin>>str;
if(str[0]=='2')
{
AboutMe();
return 0;
}
else
{
isLoad=Enter('1');
system("cls");

if(isLoad==true)
{
SetTitle(true);
cout<<" 恭喜,您输入的密码正确.可以对本系统的进行任何操作."<<endl;
}
else
{
cout<<" Sorry,您输入的密码错误.你不能修改本系统的任何内容."<<endl;
}
}
begin:
cout<<endl<<endl;
cout<<" 欢迎使用学生管理系统 "<<endl<<endl;
cout<<" 1->增加功能 2-查询功能"<<endl;
cout<<" 3->删除功能 4-排名功能"<<endl;
cout<<" 5->显示功能 6-修改功能"<<endl;
cout<<" 7->用户设置 8-退出程序"<<endl;
cout<<"请输入您的选择: "<<endl;
cin>>str;

while(str[0]!='8')
{
if(isLoad==true && head!=NULL)
{
cout<<endl<<endl;
if(str[0]=='1')
{
ZengJia(str, head);
Sort(head,'4','1');
Write(head);
}
else if(str[0]=='2')
{
ChaXun(str,head);
}
else if(str[0]=='3')
{
ShanChu(str,head);
Sort(head,'4','1');
Write(head);
}
else if(str[0]=='4')
{
PaiMing(str,head);
}
else if(str[0]=='5')
{
XianShi(str,head);
}
else if(str[0]=='6')
{
XuiGai(str,head);
Write(head);
}
else if(str[0]=='7')
{
cout<<"欢迎使用用户修改功能"<<endl;
isLoad=Enter('2');
}
else if(str[0]=='8')
{
AboutMe();
return 0;
}
else
{
cout<<"你输入错误,请重新输入."<<endl;
goto begin;
}
}
else if(isLoad==false && head!=NULL)
{
if(str[0]=='2')
{
ChaXun(str,head);
}
else if(str[0]=='4')
{
PaiMing(str,head);
}
else if(str[0]=='5')
{
XianShi(str,head);
}

else
{
cout<<"你不是管理员,不能进行此项功能."<<endl;
cout<<"你只能进行 查询功能 显示功能 排名功能"<<endl;

}
}
else if( head==NULL && isLoad==true)
{
cout<<"系统检查到你没有任何记录,不能进行任何操作,只能增加记录."<<endl;
ZengJia(str, head);
Write(head);
head=Read();

}
else if( head==NULL && isLoad==false)
{
cout<<"因为你没有登陆,系统又检查到你没有任何记录,你不能进行任何操作."<<endl;
}

cout<<endl<<endl;
cout<<"按任何键继续进行操作."<<endl;
getchar();
getchar();
system("cls");
goto begin;
}

AboutMe();

return 0;
}

void SetTitle(bool isLoad)
{

HWND hwnd=GetForegroundWindow();

if(isLoad==false)
{
SetWindowText(hwnd," 学生管理系统(没有登陆)");

}
else
{
SetWindowText(hwnd," 学生管理系统(已经登陆)");
}

system("color a");
}

void AboutMe()
{

char*pStr= " ┃ \n"
" ┃ \n"
" ┏━━━━┻━━━━┓ \n"
" ┃ 关于作者 ┃ \n"
" ┏━━━━┻━━━━━━━━━┻━━━━┓\n"
" ┃ ┃\n"
" ┃ Aauthor:********** ┃\n"
" ┃ QQ: ********* ┃\n"
" ┃ E-mail:********@**.com ┃\n"
" ┃ ┃\n"
" ┗━━━━━━━━━━━━━━━━━━━┛\n";
system("cls");

srand(time(0));
for(int i=0; i<strlen(pStr); i++)
{
if(pStr[i]!=' ')
{
Sleep(20);
}
cout<<pStr[i];
}
cout<<"Good-bye ."<<endl;
cout<<endl<<endl<<endl<<endl;
}
int main()
{
Run();
return 0;
}

❹ 学生基本信息管理系统C++源代码

#include<iostream>
#include<iomanip>
#include<string>

usingnamespacestd;

typedefstructstudent{
	unsignedm_id;
	stringm_name;
	unsignedm_age;
	stringm_sex;
	stringm_address;
	stringm_contact;
	stringm_dormitory;
	structstudent*m_next;
}student;

classCStudent{
private:
	student*head;
public:
	CStudent(){
		head=newstudent;
		head->m_id=0;
		head->m_name="noname";
		head->m_next=NULL;
	}
	~CStudent(){
		student*p=head,*q;
		while(p){
			q=p;
			p=q->m_next;
			deleteq;
		}
	}
	studentreaddata(intmodel);//model=1:不读取学号，2:不读取姓名，其他，读取所有信息
	voidentering();
	boolinsert(conststudent&astu);
	student*findid(unsignedid)const;
	student*findname(conststring&name)const;
	student*findsex(conststring&sex)const;
	student*finddormitory(conststring&dormitory)const;
	unsignedboys()const;
	unsignedgirls()const;
	unsignedheadcount()const;
	booleraseid();
	boolerasename();
	boolmodifyid();
	boolmodifyname();
	voidShow()const;
	voidquery()const;
	voidfriendstatistics(constCStudent&aclss);
	voidfrienderase(CStudent&aclss);
	voidfriendmodify(CStudent&aclss);
};

stringreadstring(){
	stringstr;
	while(cin.get()!='
');
	cin>>str;
	returnstr;
}

studentCStudent::readdata(intmodel){
	studenttmp;
	if(model!=1){cout<<"学号:";cin>>tmp.m_id;}
	if(model!=2){cout<<"姓名:";tmp.m_name=readstring();}
	cin>>tmp.m_age;
	cout<<"性别:";
	tmp.m_sex=readstring();
	cout<<"住址:";
	tmp.m_address=readstring();
	cout<<"联系方式:";
	tmp.m_contact=readstring();
	cout<<"寝室:";
	tmp.m_dormitory=readstring();
	returntmp;
}

voidCStudent::entering(){
	studenttmp;
	cout<<"学号(0toreturn):";
	cin>>tmp.m_id;
	while(tmp.m_id){
		if(findid(tmp.m_id)==NULL){
			cout<<"姓名:";
			tmp.m_name=readstring();
			cout<<"年龄:";
			cin>>tmp.m_age;
			cout<<"性别:";
			tmp.m_sex=readstring();
			cout<<"住址:";
			tmp.m_address=readstring();
			cout<<"联系方式:";
			tmp.m_contact=readstring();
			cout<<"寝室:";
			tmp.m_dormitory=readstring();
			insert(tmp);
		}
		elsecout<<"重复的学号:"<<tmp.m_id<<endl;
		cout<<"学号(0toreturn):";
		cin>>tmp.m_id;
	}
}

student*CStudent::findid(unsignedid)const{
	student*p;
	for(p=head;p->m_next;p=p->m_next)
		if(p->m_next->m_id==id)returnp;
	returnNULL;
}

student*CStudent::findname(conststring&name)const{
	student*p;
	for(p=head;p->m_next;p=p->m_next)
		if(p->m_next->m_name==name)returnp;
	returnNULL;
}


student*CStudent::findsex(conststring&sex)const{
	student*p;
	for(p=head;p->m_next;p=p->m_next)
		if(p->m_next->m_sex==sex)returnp;
	returnNULL;
}

student*CStudent::finddormitory(conststring&dormitory)const{
	student*p;
	for(p=head;p->m_next;p=p->m_next)
		if(p->m_next->m_dormitory==dormitory)returnp;
	returnNULL;
}

boolCStudent::insert(conststudent&astu){
	student*newnode,*p=head;
	if(p->m_next==NULL){
		p->m_next=newstudent(astu);
		p->m_next->m_next=NULL;
		returntrue;
	}
	while(p->m_next){
		if(p->m_next->m_id==astu.m_id){
			cout<<"重复的学号，插入失败!
";
			returnfalse;
		}
		if(p->m_next->m_id>astu.m_id){
			newnode=newstudent(astu);
			newnode->m_next=p->m_next;
			p->m_next=newnode;
			returntrue;
		}
		p=p->m_next;
	}
	p->m_next=newstudent(astu);
	p->m_next->m_next=NULL;
	returntrue;
}

unsignedCStudent::boys()const{
	unsignedcnt=0;
	student*p;
	for(p=head->m_next;p;p=p->m_next)
		if(p->m_sex=="男")++cnt;
	returncnt;
}

unsignedCStudent::girls()const{
	unsignedcnt=0;
	student*p;
	for(p=head->m_next;p;p=p->m_next)
		if(p->m_sex=="女")++cnt;
	returncnt;
}

unsignedCStudent::headcount()const{
	unsignedcnt=0;
	student*p;
	for(p=head->m_next;p;p=p->m_next,++cnt);
	returncnt;
}

boolCStudent::eraseid(){
	student*q,*p;
	unsignedid;
	cout<<"输入要删除的学号:";
	cin>>id;
	p=findid(id);
	if(p==NULL){
		cout<<"没有找到学号是""<<id<<""的学生，删除失败!
";
		returnfalse;
	}
	q=p->m_next;
	p->m_next=q->m_next;
	deleteq;
	returntrue;
}
boolCStudent::erasename(){
	student*q,*p;
	stringname;
	cout<<"输入要删除人的姓名:";
	name=readstring();
	p=findname(name);
	if(p==NULL){
		cout<<"没有找到姓名是""<<name<<""的学生，删除失败!
";
		returnfalse;
	}
	q=p->m_next;
	p->m_next=q->m_next;
	deleteq;
	returntrue;
}

boolCStudent::modifyid(){
	studenttmp,*p;
	unsignedid;
	cout<<"输入要修改的学号:";
	cin>>id;
	p=findid(id);
	if(p==NULL){
		cout<<"没有找到学号是""<<id<<""的学生，修改失败!
";
		returnfalse;
	}
	tmp=readdata(1);
	tmp.m_id=id;
	*p=tmp;
	returntrue;
}

boolCStudent::modifyname(){
	student*p,tmp;
	stringname;
	cout<<"输入要修改人的姓名:";
	name=readstring();
	p=findname(name);
	if(p==NULL){
		cout<<"没有找到姓名是""<<name<<""的学生，修改失败!
";
		returnfalse;
	}
	tmp=readdata(2);
	tmp.m_name=name;
	*p=tmp;
	returntrue;
}

intmenu(){
	intchoice;
	do{
		system("cls");
		cout<<"	****************************
";
		cout<<"	*学生基本信息管理系统*
";
		cout<<"	*==========================*
";
		cout<<"	*1、录入学生信息*
";
		cout<<"	*2、显示学生信息*
";
		cout<<"	*3、查询学生信息*
";
		cout<<"	*4、添加学生信息*
";
		cout<<"	*5、统计学生信息*
";
		cout<<"	*6、删除学生信息*
";
		cout<<"	*7、修改学生信息*
";
		cout<<"	*0、退出管理系统*
";
		cout<<"	****************************
";
		cout<<"
	请选择:";
		cin>>choice;
	}while(choice<0||choice>7);
	returnchoice;
}

voidshow(student*p){
	cout<<p->m_id<<""<<p->m_name<<""<<p->m_age<<"";
	cout<<p->m_sex<<""<<p->m_address<<"";
	cout<<p->m_contact<<""<<p->m_dormitory<<endl;
}

voidCStudent::Show()const{
	student*p;
	cout<<"----------------------------------------------------------
";
	for(p=head->m_next;p;p=p->m_next)show(p);
	cout<<"----------------------------------------------------------
";
	system("pause");
}

voidCStudent::query()const{
	intselect;
	unsignedid;
	stringname;
	student*p;
	cout<<"1、按学号查询
2、按姓名查询
0、返回
";
	cin>>select;
	switch(select){
		case1:cout<<"请输入学号:";cin>>id;
			if(p=findid(id))show(p->m_next);
			break;
		case2:cout<<"请输入姓名:";name=readstring();
			if(p=findname(name))show(p->m_next);
			break;
		case0:return;
		default:cout<<"选择错误。
";
	}
	system("pause");
}

voidstatistics(constCStudent&a){
	unsignedtotal=a.headcount();
	unsignedboys=a.boys();
	unsignedgirls=a.girls();
	cout<<"学生总数:"<<total<<"人。
";
	cout<<"其中，男生:"<<boys<<"名。";
	cout<<"女生:"<<girls<<"名。
";
	system("pause");
}

voiderase(CStudent&a){
	intselect;
	unsignedid;
	stringname;
	student*p,*q;
	cout<<"1、按学号删除
2、按姓名删除
0、返回
";
	cin>>select;
	switch(select){
		case1:cout<<"请输入学号:";cin>>id;
			if(p=a.findid(id)){
				q=p->m_next;
				p->m_next=q->m_next;
				deleteq;
				cout<<"成功删除"<<id<<"的信息。
";
			}
			break;
		case2:cout<<"请输入姓名:";name=readstring();
			if(p=a.findname(name)){
				q=p->m_next;
				p->m_next=q->m_next;
				deleteq;
				cout<<"成功删除"<<name<<"的信息。
";
			}
			break;
		case0:return;
		default:cout<<"选择错误。
";
	}
	system("pause");
}

voidmodify(CStudent&a){
	intselect;
	cout<<"1、按学号修改
2、按姓名修改
0、返回
";
	cin>>select;
	switch(select){
		case1:if(a.modifyid())cout<<"修改成功。
";break;
		case2:if(a.modifyname())cout<<"修改成功。
";break;
		case0:return;
		default:cout<<"选择错误。
";
	}
	system("pause");
}

intmain(){
	CStudenta;
	intan;
	do{
		an=menu();
		switch(an){
			case1:a.entering();break;
			case2:a.Show();break;
			case3:a.query();break;
			case4:a.entering();break;
			case5:statistics(a);break;
			case6:erase(a);break;
			case7:modify(a);break;
			case0:break;
			default:cout<<"选择错误。
";break;
		}
	}while(an);
	return0;
}

❺ 学生信息管理系统最简单源代码。

方法一：

1、创建一个c语言项目。然后右键头文件，创建一个Stu的头文件。

❻ 学生管理系统源代码c++

#include <iostream.h>
#include <string.h>
#include "h1.h"
void menu();
void clear()
{
cin.clear();
cin.ignore();
}
void stu::init_name_grade() //输入学生姓名、班级
{
cout<<"请输入学生姓名:";
cin>>name;
clear();
cout<<"请输入学生班级号:";
cin>>grade;
clear();
}

void stu::init_first() //输入学生第一学期成绩
{
cout<<"学生"<<name<<"第一学期成绩"<<endl;
cout<<"请输入英语成绩:";
cin>>first.english;
clear();
cout<<"请输入数学成绩:";
cin>>first.math;
clear();
first.total=first.english+first.math;
first.aver=first.total/2;
}

void stu::init_second() //输入学生第二学期成绩
{
cout<<"学生"<<name<<"第二学期成绩"<<endl;
cout<<"请输入英语成绩:";
cin>>second.english;
clear();
cout<<"请输入数学成绩:";
cin>>second.math;
clear();
second.total=second.english+second.math;
second.aver=second.total/2;
}

void stu::show_first() //显示学生第一学期成绩
{
cout<<"学生姓名："<<name<<endl;
cout<<"学生班级："<<grade<<endl;
cout<<"学生第一学期英语成绩："<<first.english<<endl;
cout<<"学生第一学期数学成绩："<<first.math<<endl;
cout<<"学生第一学期总成绩："<<first.total<<endl;
cout<<"学生第一学期平均成绩："<<first.aver<<endl;
}

void stu::show_second() //显示学生第二学期成绩
{
cout<<"学生姓名："<<name<<endl;
cout<<"学生班级："<<grade<<endl;
cout<<"学生第二学期英语成绩："<<second.english<<endl;
cout<<"学生第二学期数学成绩："<<second.math<<endl;
cout<<"学生第二学期总成绩："<<second.total<<endl;
cout<<"学生第二学期平均成绩："<<second.aver<<endl;
}

void stu::show_grade() //显示学生所有学期成绩
{
cout<<"学生姓名："<<name<<endl;
cout<<"学生班级："<<grade<<endl;
cout<<"学生第一学期英语成绩："<<first.english<<endl;
cout<<"学生第一学期数学成绩："<<first.math<<endl;
cout<<"学生第一学期总成绩："<<first.total<<endl;
cout<<"学生第一学期平均成绩："<<first.aver<<endl;
cout<<"学生第二学期英语成绩："<<second.english<<endl;
cout<<"学生第二学期数学成绩："<<second.math<<endl;
cout<<"学生第二学期总成绩："<<second.total<<endl;
cout<<"学生第二学期平均成绩："<<second.aver<<endl;
}

stu_info::stu_info() //stu_info的构造函数
{
num=0;
}

void stu_info::add_name_grade() //添加学生信息（班级、姓名）到数组中
{
int choose;
do
{
per[num].init_name_grade();
num++;
cout<<"继续输入学生信息吗?(0:退出,任意数字键继续...)";
cin>>choose;
clear();
}while(choose!=0);
}

void stu_info::add_first(int gra) //添加第一学期成绩
{
for(int i=0;i<num;i++)
{
if(per[i].grade==gra)
{
per[i].init_first();
}
}
}

void stu_info::add_second(int gra) //添加第二学期成绩
{
for(int i=0;i<num;i++)
{
if(per[i].grade==gra)
{
per[i].init_second();
}
}
}

void stu_info::query_aver(int gra,int term) //按班级、学期及平均分排序显示学生成绩
{
stu temp[100];
stu t;
int sum=0;
for(int i=0;i<num;i++)
{
if(per[i].grade==gra)
{
temp[sum]=per[i];
sum++;
}
}
for(int j=0;j<sum-1;j++)
{
for(int k=sum-1;k>j;k--)
{
if(term==1)
{
if(temp[k].first.aver>temp[k-1].first.aver)
{
t=temp[k];
temp[k]=temp[k-1];
temp[k-1]=t;
}
}
else if(term==2)
{
if(temp[k].second.aver>temp[k-1].second.aver)
{
t=temp[k];
temp[k]=temp[k-1];
temp[k-1]=t;
}
}
else
{
cout<<"该学期不存在！"<<endl;
return;
}
}
}
for( i=0;i<sum;i++)
{
if(term==1)
{
temp[i].show_first();
}
else
{
temp[i].show_second();
}
}
}

void stu_info::modify(int gra,char name[10]) //按班级、姓名查询学生信息并修改学生信息
{
for(int i=0;i<num;i++)
{
if(per[i].grade==gra&&strcmp(per[i].name,name)==0)
{
per[i].init_name_grade();
per[i].init_first();
per[i].init_second();
return;
}
else
{
cout<<"该学生不存在！"<<endl;
}
}
}

void stu_info::query(int gra,char name[10]) //按班级、姓名查询学生信息并输出
{
for(int i=0;i<num;i++)
{
if(per[i].grade==gra&&strcmp(per[i].name,name)==0)
{
per[i].show_grade();
return;
}
else
{
cout<<"该学生不存在！"<<endl;
}
}
}

void stu_info::query_grade(int gra) //按班级输出该班全部学生成绩
{
cout<<gra<<"班级学生的成绩如下:"<<endl;
for(int i=0;i<num;i++)
{
if(per[i].grade==gra)
{
per[i].show_grade();
}
}
}

void stu_info::show_fail(int grade,int term,int course)
{
cout<<"不及格名单如下:"<<endl;
for(int i=0;i<num;i++)
{
if(per[i].grade==grade)
{
if(term==1)
{
if(course==1)
{
if(per[i].first.english<60)
{
cout<<per[i].name<<endl;
}
}else if(course==2)
{
if(per[i].first.math<60)
{
cout<<per[i].name<<endl;
}
}
}
else if(term==2)
{
if(course==1)
{
if(per[i].second.english<60)
{
cout<<per[i].name<<endl;
}
}else if(course==2)
{
if(per[i].second.math<60)
{
cout<<per[i].name<<endl;
}
}
}
else
{
cout<<"该学期不存在！"<<endl;
return;
}
}
}
}

void main()
{
stu_info people;
int grade;
int term;
int choose;
int course;
char name[10];
while(1)
{
menu();
cin>>choose;
clear();
switch(choose)
{
case 1:
people.add_name_grade();break;
case 2:
cout<<"请输入班级号:";
cin>>grade;
clear();
cout<<"请输入学期:";
cin>>term;
clear();
if(term==1)
people.add_first(grade);
else
people.add_second(grade);
break;
case 3:
cout<<"请输入班级号:";
cin>>grade;
clear();
cout<<"请输入学生姓名:";
cin>>name;
clear();
people.modify(grade,name);
break;
case 4:
cout<<"请输入班级号:";
cin>>grade;
clear();
cout<<"请输入学期:";
cin>>term;
clear();
people.query_aver(grade,term);
break;
case 5:
cout<<"请输入班级号:";
cin>>grade;
clear();
people.query_grade(grade);
break;
case 6:
cout<<"请输入班级号:";
cin>>grade;
clear();
cout<<"请输入学期:";
cin>>term;
clear();
cout<<"请输入课程号(1:english,2:math):";
cin>>course;
people.show_fail(grade,term,course);
break;
case 7:
cout<<"请输入班级号:";
cin>>grade;
clear();
cout<<"请输入学生姓名:";
cin>>name;
clear();
people.query(grade,name);
break;
case 8:return;
default:cout<<"选择错误，请重新选择！"<<endl;
}
}
}

void menu()
{
cout<<" 请选择操作"<<endl;
cout<<"-------------------------------------------------------------"<<endl;
cout<<" 1、输入学生姓名、班级"<<endl;
cout<<" 2、按学期、班级录入学生成绩"<<endl;
cout<<" 3、修改学生成绩"<<endl;
cout<<" 4、按班级平均分对学生成绩排序"<<endl;
cout<<" 5、按班级输出学生的成绩单"<<endl;
cout<<" 6、按科目输出不及格学生名单"<<endl;
cout<<" 7、查询学生成绩单"<<endl;
cout<<" 8、退出系统"<<endl;
}
这上面是实现功能，下面是类的定义和声明 希望对你有用

struct term
{
int english;
int math;
int aver;
int total;
};
class stu
{
char name[10];
int grade;
struct term first;
struct term second;
public:
friend class stu_info;
void init_name_grade();
void init_first();
void init_second();
void show_grade();
void show_first();
void show_second();
};
class stu_info
{
stu per[100];
int num;
public:
stu_info();
void add_name_grade();
void add_first(int gra);
void add_second(int gra);
void query_aver(int gra,int term);
void modify(int gra,char name[10]);
void query(int gra,char name[10]);
void query_grade(int gra);
void show_fail(int grade,int term,int course);
};