王杰国庆作业day3

父子进程对话

#include <stdio.h>
#include <string.h>
#include <stdlib.h>	
#include <my_head.h>
int main(int argc, const char *argv[])
{mkfifo("./fifo1",0664);mkfifo("./fifo2",0664);pid_t cpid = fork();if(0 < cpid){int wfd = open("./fifo1",O_WRONLY);int rfd = open("./fifo2",O_RDONLY);char buf[128] = "";while(1){bzero(buf,sizeof(buf));printf("父进程请输入>>>>>\n");scanf("%s",buf);write(wfd,buf,sizeof(buf));bzero(buf,sizeof(buf));read(rfd,buf,sizeof(buf));printf("父进程接收打印：%s\n",buf);}close(wfd);close(rfd);}if(0 == cpid){int rfd = open("./fifo1",O_RDONLY);int wfd = open("./fifo2",O_WRONLY);char buf[128] = "";while(1){	bzero(buf,sizeof(buf));read(rfd,buf,sizeof(buf));printf("子进程接收打印：%s\n",buf);bzero(buf,sizeof(buf));printf("子进程请输入>>>>>\n");scanf("%s",buf);write(wfd,buf,sizeof(buf));}close(wfd);close(rfd);}return 0;
}