parallel_client.c

网络编程的服务端和客户端.包括用fork和select分别实现多进程编程和多线程编程.程序已经通过测试的.

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>


#include "err_exit.h"
#include "socketfun.h"

int main(int argc,char ** argv)
{
	int connfd;
	int n;
	int result;
	char buf[MAXBUFFSIZE];
			
	/* 与服务建立连接 */
	connfd=socket_connect(NULL,STRPARALLELPORT);
	if(argc==1){
		strcpy(buf,"Hello World!");
		write(connfd,buf,strlen(buf));
	}else{
		write(connfd,argv[1],strlen(argv[1]));
	}
	n=read(connfd,buf,sizeof(buf));
	buf[n]=0;		/* 终止符 */
	printf("string from server=%s\n",buf);
	close(connfd);
	exit(0);
}