netsrv.cpp

本程序实现的是网络聊天功能 不知道对大家有没有用

#include <Winsock2.h>
#include <stdio.h>
void main()
{
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	wVersionRequested=MAKEWORD(1,1);
	err=WSAStartup(wVersionRequested,&wsaData);
	if(err!=0)
	{
		return;
	}
	if (LOBYTE(wsaData.wVersion)!=1||HIBYTE(wsaData.wVersion)!=1)
	{
		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[200];
	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!");
		gets(sendBuf);
		sendto(sockSrv,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrClient,len);
		
	}
	closesocket(sockSrv);
	WSACleanup();
}