tf通信测试软件源码

A. 安卓手机如何测试手机tf卡读写速度

TF卡上有速度等级标志（字母C内有一个数字），一般手机用C4（Class4）就可以了。C6以上的在手机和平板电脑上体现不出来。

B. C++通讯录的源代码

分是万能的吗？
请客气些。

C. 求TF-IDF算法的C++或java源码。

之前写过的，请加分。

#include<map>
#include<set>
#include<string>
#include<iostream>
#include<fstream>
#include<vector>
#include<cmath>
#include<algorithm>
usingnamespacestd;
map<string,float>IDFTable;
structWords{
	stringwd;
	floatfreq;
	floatweight;
};
boolcmp(Words&w1,Words&w2)
{
	returnw1.weight>w2.weight;
}
map<string,int>WordTable;
vector<Words>WordList;
charComment[]=",.!"?;:()";
inttotalText=0;
boolIsAllNumber(stringcs)
{
	for(inti=0;i<cs.length();i++)
	{
		if(cs[i]<'0'||cs[i]>'9')
			returnfalse;
	}
	returntrue;
}
boolIsblank(stringcs)
{
	for(inti=0;i<cs.length();i++)
	{
		if(cs[i]!=''&&cs[i]!='	')
			returnfalse;
	}
	returntrue;
}
string&ToLower(string&cs)
{
	for(inti=0;i<cs.length();i++)
	{
		if(cs[i]>='A'&&cs[i]<='Z')
			cs[i]+=('a'-'A');
	}
	returncs;
}
voidreadFile(stringfname,set<string>&wds)
{
	ifstreamfin(fname.c_str());
	stringword;
	wds.clear();
	while(!fin.eof())
	{
		fin>>word;
		for(inti=0;Comment[i]!=0;i++)
		{
			intpos;
			while((pos=word.find(Comment[i]))!=-1)
			{
				word.replace(pos,1,"");
			}
		}
		//theworld;
		if(!IsAllNumber(word)&&!Isblank(word))
		{
			wds.insert(ToLower(word));
		}
		/*totalwords++;
		*/
	}
	fin.close();
}
voidGenerateIDF()
{
	totalText=0;
	stringfiles[7]={"curious.txt",
		"erotic.txt",
		"fall.txt",
		"hands.txt",
		"water.txt",
		"wifi.txt",
		"young.txt"};
	intx;
	set<string>wds;
	for(inti=0;i<7;i++)
	{
		readFile(files[i],wds);
		for(set<string>::iteratorit=wds.begin();it!=wds.end();++it)
		{
			map<string,float>::iteratoriter;
			stringword=*it;
			if((iter=IDFTable.find(word))!=IDFTable.end())
			{
				iter->second+=1;
			}
			else
			{
				IDFTable[word]=1;
			}
		}
		totalText++;
	}
	//
	intcnt=0;
	for(map<string,float>::iteratoriter=IDFTable.begin();iter!=IDFTable.end();++iter)
	{
		iter->second=log((float)totalText/(iter->second+1.0));
		/*cout<<iter->first<<''<<iter->second<<endl;
		cnt++;
		if(cnt%100==0)
		{
			cin>>x;
		}*/
	}
}
intGenerateTF(){
	ifstreamfin("Test.txt");
	stringword;
	inttextwords=0;
	while(!fin.eof())
	{
		fin>>word;
		for(inti=0;Comment[i]!=0;i++)
		{
			intpos;
			while((pos=word.find(Comment[i]))!=-1)
			{
				word.replace(pos,1,"");
			}
		}
		if(!IsAllNumber(word)&&!Isblank(word))
		{
			//wds.insert(ToLower(word));
			textwords++;
			ToLower(word);
			map<string,int>::iteratorit;
			if((it=WordTable.find(word))!=WordTable.end())
			{
				it->second++;
			}
			else
			{
				WordTable[word]=1;
			}

		}
		
		
	}
	fin.close();
	//计算频率
	for(map<string,int>::iteratorit=WordTable.begin();it!=WordTable.end();++it)
	{
		Wordswd;
		wd.wd=it->first;
		wd.freq=(float)(it->second)/textwords;
		floatidf=0;
		map<string,float>::iteratoriter;
		if((iter=IDFTable.find(wd.wd))!=IDFTable.end())
		{
			idf=iter->second;
		}
		else
			idf=log((float)totalText);
		wd.weight=wd.freq*idf;
		WordList.push_back(wd);
	}

	returntextwords;
}
voidGenerateSort()
{
	sort(WordList.begin(),WordList.end(),cmp);
}
intmain(){
	GenerateIDF();
	inttxtwd=GenerateTF();
	GenerateSort();
	inttopnum=10;
	cout<<"TotalWords:"<<txtwd<<"Top"<<topnum<<":
";
	cout<<"Wrod		Weight
";
	for(inti=0;i<topnum;i++)
	{
		cout<<WordList[i].wd<<"		"<<WordList[i].weight<<endl;
	}
}