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std::system

STD：系统

Defined in header ​​
int system( const char* command ​​

调用主机环境%27s命令处理器%28/bin/sh，，，cmd.exe，，，command.com%29，参数为command返回实现定义的值%28，通常是被调用的程序返回%29的值。

如果command是一个空指针，检查主机环境是否有命令处理器，并且只有当命令处理器存在时才返回非零值。

参数

command-character string identifying the command to be run in the command processor. If a null pointer is given, command processor is checked for existence

返回值

实现-定义的值。如果command为空指针，只有在命令处理器存在时才返回非零值。

注记

在POSIX系统上，返回值可以用WEXITSTATUS和WSTOPSIG...

相关POSIX函数波芬生成的输出command打电话的人可以用。

例

二次

#include <cstdlib>
#include <fstream>
#include <iostream>
 
int main()
{
    std::system("ls -l >test.txt" // execute the UNIX command "ls -l >test.txt"
    std::cout << std::ifstream("test.txt").rdbuf(
}

二次

可能的产出：

二次

total 16
-rwxr-xr-x 1 2001 2000 8859 Sep 30 20:52 a.out
-rw-rw-rw- 1 2001 2000  161 Sep 30 20:52 main.cpp
-rw-r--r-- 1 2001 2000    0 Sep 30 20:52 test.txt

二次

另见

C系统文件

*。

 © cppreference.com

在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

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