计算机网络课程设计（农大）socket实现FTP客户端 C++实现

#include <stdio.h> main() { int i,r,p1,p2,fd[2]; char buf[50],s[50]; pipe(fd); while((p1=fork())==-1); if(p1==0) { lockf(fd[1],1,0); sprintf(buf,"child process P1 is sending messages!\n"); printf("child processP1!\n"); write(fd[1],buf,50); sleep(5); lockf(fd[1],0,0); exit(0); } else { while((p2=fork())==-1); if(p2==0) { lockf(fd[1],1,0); sprintf(buf,"child process P2 is sending messages!\n"); printf("child processP2!\n"); write(fd[1],buf,50); sleep(5); lockf(fd[1],0,0); exit(0); } wait(0); if(r=read(fd[0],s,50)==-1) { printf(:can't read pipe\n"); } else { printf(:%s\n",s); } wait(0); if(r=read(fd[0],s,50)==-1) { printf(:can't read pipe\n"); } else { printf(:%s\n",s); } exit(0); } }