wait.cc

来自「达内IT培训Unix C++第二天源码 是入门Unix 下C++编程的好东西」· CC 代码 · 共 29 行

#include <iostream>
using namespace std;
#include <unistd.h>
#include <sys/wait.h>

int main()
{
	int ret = fork();
	if(ret<0){
		cout << "error in fork!" << endl;
		return -1;
	}
	if(ret==0){
		for(int i=0; i<5; i++){
			cout << "pid=" << getpid() << ", my parent:" << getppid() << endl;
			sleep(1);
		}
	}
	else{
		int pid=wait(NULL);
		cout << "wait return:" << pid<<endl;
		for(int i=0; i<10; i++){
			cout << "PID=" << getpid() << endl;
			sleep(1);
		}
	}
}