Linux下用C++调用Shell进行截屏

#include <stdio.h>
#include <cstdlib>

int main()
{
 printf("I am a picture capture\n");
//调用import命令截当前全屏
//文件名是“1.jpg”
 system("import -window root 1.jpg");
 printf("Done!\n");
 return 0;
}