解决：gzip -c test.txt > /root/test.gz，文件流重定向，解压也是，gunzip -c /root/test.gz > ./test.txt
经验：更常用的命令tar同样可以解压*.gz，参数为-c
附gzip帮助文件
GZIP(1) General Commands Manual GZIP(1)
NAME
gzip, gunzip, zcat - compress or expand files
SYNOPSIS
gzip [ -acdfhlLnNrtvV19 ] [-S suffix] [ name ... ]
gunzip [ -acfhlLnNrtvV ] [-S suffix] [ name ... ]
zcat [ -fhLV ] [ name ... ]
OPTIONS
-a --ascii
Ascii text mode: convert end-of-lines using local conventions.
This option is supported only on some non-Unix systems. For
MSDOS, CR LF is converted to LF when compressing, and LF is con‐
verted to CR LF when decompressing.
-c --stdout --to-stdout
Write output on standard output; keep original files unchanged.
If there are several input files, the output consists of a
sequence of independently compressed members. To obtain better
compression, concatenate all input files before compressing
them.
-d --decompress --uncompress
Decompress.
-f --force
Force compression or decompression even if the file has multiple
links or the corresponding file already exists, or if the com‐
pressed data is read from or written to a terminal. If the input
data is not in a format recognized by gzip, and if the option
--stdout is also given, the input data without change to
the standard output: let zcat behave as cat. If -f is not
given, and when not running in the background, gzip prompts to
verify whether an existing file should be overwritten.
-h --help
Display a help screen and quit.
-l --list
For each compressed file, list the following fields:
compressed size: size of the compressed file
uncompressed size: size of the uncompressed file
ratio: compression ratio (0.0% if unknown)
uncompressed_name: name of the uncompressed file
The uncompressed size is given as -1 for files not in gzip for‐
mat, such as compressed .Z files. To get the uncompressed size
for such a file, you can use:
zcat file.Z | wc -c
In combination with the --verbose option, the following fields
are also displayed:
method: compression method
crc: the 32-bit CRC of the uncompressed data
date & time: time stamp for the uncompressed file
The compression methods currently supported are deflate, com‐
press, lzh (SCO compress -H) and pack. The crc is given as
ffffffff for a file not in gzip format.
With --name, the uncompressed name, date and time are those
stored within the compress file if present.
With --verbose, the size totals and compression ratio for all
files is also displayed, unless some sizes are unknown. With
--quiet, the title and totals lines are not displayed.
-L --license
Display the gzip license and quit.
-n --no-name
When compressing, do not save the original file name and time
stamp by default. (The original name is always saved if the name
had to be truncated.) When decompressing, do not restore the
original file name if present (remove only the gzip suffix from
the compressed file name) and do not restore the original time
stamp if present ( it from the compressed file). This option
is the default when decompressing.
-N --name
When compressing, always save the original file name and time
stamp; this is the default. When decompressing, restore the
original file name and time stamp if present. This option is
useful on systems which have a limit on file name length or when
the time stamp has been lost after a file transfer.
-q --quiet
Suppress all warnings.
-r --recursive
Travel the directory structure recursively. If any of the file
names specified on the command line are directories, gzip will
descend into the directory and compress all the files it finds
there (or decompress them in the case of gunzip ).
-S .suf --suffix .suf
When compressing, use suffix .suf instead of .gz. Any non-empty
suffix can be given, but suffixes other than .z and .gz should
be avoided to avoid confusion when files are transferred to
other systems.
When decompressing, add .suf to the beginning of the list of
suffixes to try, when deriving an output file name from an input
file name.
pack(1).
-t --test
Test. Check the compressed file integrity.
-v --verbose
Verbose. Display the name and percentage rection for each file
compressed or decompressed.
-V --version
Version. Display the version number and compilation options then
quit.
-# --fast --best
Regulate the speed of compression using the specified digit #,
where -1 or --fast indicates the fastest compression method
(less compression) and -9 or --best indicates the slowest com‐
pression method (best compression). The default compression
level is -6 (that is, biased towards high compression at expense
of speed).
Ⅱ 想在linux上用C实现gzip压缩与解压缩，有没有相关库函数可以调用
命令： gzip语法：gzip ［选项］ 压缩（解压缩）的文件名
-c 将输出写到标准输出上，并保留原有文件。
-d 将压缩文件解压。
-l 对每个压缩文件，显示下列字段：
（1）压缩文件的大小
（2）未压缩文件的大小
（3）压缩比
未压缩文件的名字
-r 递归式地查找指定目录并压缩其中的所有文件或者是解压缩。
-t 测试，检查压缩文件是否完整。
-v 对每一个压缩和解压的文件，显示文件名和压缩比。
-num 用指定的数字num调整压缩的速度，-1或--fast表示最快压缩方法（低压缩比），-9或--best表示最慢压缩方法（高压缩比）。系统缺省值为6。
注：gzip不能压缩整个目录。可以使用tar先打包，再压缩
例如：
$ tar cf test.tar test/
$ gzip test.tar
或
$ tar czf test.tar.gz test/
Ⅲ 怎么用c语言将.zip文件解压成文件夹
简单一点的 直接调用系统命令
比如system("unzip ___filename___ -d target_path");
这样做 实际就相当于在命令行下敲了这样的一个命令
不过 这个要求系统内 必须安装了unzip这个软件 即支持这个命令
复杂一些的 你可以再网上找一个开源的gzip 很多很好找的 然后看懂代码 调用对应的接口函数
这样做的好处不需要依赖系统环境
Ⅳ 请问如何用C语言写一个输入路径，压缩和解压文件的代码 能分享一下源码吗 我想学习一下
这个如果是在linux下面的话可以调用系统自带的压缩工具
大致给你说一下步骤吧。具体还是靠你自己实现
输入路径。这个就不多说。scanf
分析输入的文件路径，或者后缀名。然后调用 tar gzip等压缩，解压缩命令。
压缩的算法如果有兴趣你也可以自己去实现一下。不过不容易实现。还是调用系统自带的压缩命令吧。