socket客戶端代碼

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <arpa/inet.h>
#define port 8081
#define maxn 100
int main(int argc,char *argv[])
{
	int s;
	struct sockaddr_in server;
	
	s=socket(AF_INET, SOCK_STREAM, 0);
	if(s < 0){
		printf("socket error\n");
		return -1;
	}
	else printf("yes\n");
	
	bzero(&server,sizeof (server));
	server.sin_family=AF_INET;
	server.sin_addr.s_addr = inet_addr("125.216.250.4");
	server.sin_port=htons(port);
	
	int err=connect(s, (struct sockaddr*)&server, sizeof (struct sockaddr));
	if(err<0)
	printf("connect fail\n");
	else puts("success");
	char buf1[19]="nihao";
	char buf2[1024];
	ssize_t size=0;
	//for(;;){
	write(s,buf1,19);
	size=read(s,buf2,1024);
	if(size>0)
	{
	printf("read success\n");
	puts(buf2);
	}
	//}
}