VC++之网络编程五 聊天编程实例(UDP)

转自http://blog.csdn.net/thinkscape/article/details/4037483

Server:

#include <Winsock2.h>
#include <stdio.h>
void main(){
	//mide delete word
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	wVersionRequested=MAKEWORD(2,2);
	err=WSAStartup(wVersionRequested,&wsaData);
	if(err!=0){
		return;
	}
	if(LOBYTE(wsaData.wVersion)!=2 || HIBYTE(wsaData.wHighVersion)!=2)
	{
		WSACleanup();
		return ;
	}
	
	SOCKET sockSrv=socket(AF_INET,SOCK_DGRAM,0);
	
	SOCKADDR_IN addrSrv;
	addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
	addrSrv.sin_family=AF_INET;
	addrSrv.sin_port=htons(6000);
	
	bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
	
	char recvBuf[100];
	char sendBuf[100];
	char tempBuf[100];
	
	SOCKADDR_IN addrClient;
	int len=sizeof(SOCKADDR);
	
	while(1)
	{
		recvfrom(sockSrv,recvBuf,100,0,(SOCKADDR*)&addrClient,&len);
		if('q'==recvBuf[0])
		{
			sendto(sockSrv,"q",strlen("q")+1,0,(SOCKADDR*)&addrClient,len);
			printf("chat end!/n");
			break;
		}
		
		sprintf(tempBuf,"%s say: %s",inet_ntoa(addrClient.sin_addr),recvBuf);
		printf("%s/n",tempBuf);
		printf("Please input data:/n");
		gets(sendBuf);
		sendto(sockSrv,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrClient,len);
		
		
	}
	closesocket(sockSrv);
	WSACleanup();
}

client:

#include <Winsock2.h>
#include <stdio.h>
void main(){
	//mide delete word
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	wVersionRequested=MAKEWORD(2,2);
	err=WSAStartup(wVersionRequested,&wsaData);
	if(err!=0){
		return;
	}
	if(LOBYTE(wsaData.wVersion)!=2 || HIBYTE(wsaData.wHighVersion)!=2)
	{
		WSACleanup();
		return ;
	}
	
	SOCKET sockClient=socket(AF_INET,SOCK_DGRAM,0);
	
	SOCKADDR_IN addrSrv;
	addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
	addrSrv.sin_family=AF_INET;
	addrSrv.sin_port=htons(6000);
	sendto(sockClient,"Hello",strlen("Hello")+1,0,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
	
	closesocket(sockClient);
	WSACleanup();
}

注意：

server 和 client 都要"项目属性"--->"配置属性"----> "链接"----> "输入" --->"附加依赖项"中添加"ws2_32.lib"