pipe.c

进程间通信的实验代码

#include<stdio.h>
main()
{
	int pid1,pid2,fd[2];
	char buf[50],s[50];
	pipe(fd);
	while ((pid1=fork())==-1);
	if (pid1==0)
	{
		sprintf(buf,"Child1 is sending message!");
		write(fd[1],buf,50);
		exit(0);
	}
	else
	{
		while ((pid2=fork())==-1);
		if (pid2==0)
		{
			sleep(1);
			sprintf(buf,"Child2 is sending message!");
			write(fd[1],buf,50);
			exit(0);
		}
		else
		{ 
		wait(0);
		read(fd[0],s,50);
		printf("%s\n",s);

		wait(0);
		read(fd[0],s,50);
		printf("%s\n",s);
		exit(0);
		}
	}
}