用C++查看system()调用的输出

Question

如何查看系统命令的输出.例如:

int _tmain(int argc, _TCHAR* argv[]) {

   system("set PATH=%PATH%;C:/Program Files (x86)/myFolder/bin");
   system("cd C:/thisfolder/");

   std::cin.get();
   return 0;

}

当我在Visual Studio中运行程序时,它给我一个黑屏,我看不到正在运行的命令.我需要它,所以我可以查看它是否有效.谢谢!

Answer 1

用popen而不是system.请参阅此处的示例https://msdn.microsoft.com/en-us/library/96ayss4b.aspx

char   psBuffer[128];
FILE   *pPipe;

if( (pPipe = _popen( "set PATH=%PATH%;C:/Program Files (x86)/myFolder/bin", "rt" )) == NULL )
    exit( 1 );

然后

while(fgets(psBuffer, 128, pPipe)) {
    printf(psBuffer);
}

if (feof( pPipe))
    printf( "\nProcess returned %d\n", _pclose( pPipe ) );