upd通信代码-windows版

1.服务端代码：

#include <WinSock2.h>
#include <iostream>
#pragma comment(lib,"ws2_32.lib")
using namespace std;

void main(){

    //初始化SOCKET
    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;
    }

    //设置SOCKET
    SOCKET server = socket(AF_INET,SOCK_DGRAM,0);
    SOCKADDR_IN addr;
    addr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    addr.sin_family = AF_INET;
    addr.sin_port = htons(6000);
    //绑定服务器
    bind(server,(SOCKADDR*)&addr, sizeof(SOCKADDR));

    char recvBuf[1024],sendBuf[1024],tempBuf[1024];

    SOCKADDR_IN addrClient;
    INT len = sizeof(SOCKADDR);

    sendto(server,"连接成功，请键入聊天消息",strlen("连接成功，请键入聊天消息")+1,0,(SOCKADDR*)&addrClient,len);

    while(1){

        //读取数据
        recvfrom(server,recvBuf,1000,0,(SOCKADDR*)&addrClient,&len);

        cout<<recvBuf<<endl;

        cout<<"夜末: ";
        cin>>sendBuf;
        sprintf(tempBuf,"夜末: %s",sendBuf);
        sendto(server,tempBuf,strlen(tempBuf)+1,0,(SOCKADDR*)&addrClient,len);

    }
    closesocket(server);
    WSACleanup();
}

#include <WinSock2.h>
#include <iostream>
#pragma comment(lib,"ws2_32.lib")
using namespace std;

void main(){

	//初始化SOCKET
	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;
	}

	//设置SOCKET
	SOCKET server = socket(AF_INET,SOCK_DGRAM,0);
	SOCKADDR_IN addr;
	addr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
	addr.sin_family = AF_INET;
	addr.sin_port = htons(6000);
	//绑定服务器
	bind(server,(SOCKADDR*)&addr, sizeof(SOCKADDR));

	char recvBuf[1024],sendBuf[1024],tempBuf[1024];

	SOCKADDR_IN addrClient;
	INT len = sizeof(SOCKADDR);

	sendto(server,"连接成功，请键入聊天消息",strlen("连接成功，请键入聊天消息")+1,0,(SOCKADDR*)&addrClient,len);

	while(1){

		//读取数据
		recvfrom(server,recvBuf,1000,0,(SOCKADDR*)&addrClient,&len);

		cout<<recvBuf<<endl;

		cout<<"夜末: ";
		cin>>sendBuf;
		sprintf(tempBuf,"夜末: %s",sendBuf);
		sendto(server,tempBuf,strlen(tempBuf)+1,0,(SOCKADDR*)&addrClient,len);

	}
	closesocket(server);
	WSACleanup();
}

2.客户端代码

#include <WinSock2.h>
#include <iostream>
#pragma comment(lib,"ws2_32.lib")
using namespace std;

void main(){

    char ip[20],name[100];

    cout<<"请输入服务器端IP地址:";
    cin>>ip;

    cout<<"请输入名的昵称:";
    cin>>name;

    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 client = socket(AF_INET,SOCK_DGRAM,0);
    SOCKADDR_IN addr;
    addr.sin_addr.S_un.S_addr = inet_addr(ip);
    addr.sin_family = AF_INET;
    addr.sin_port = htons(6000);

    char recvBuf[1024],sendBuf[1024],tempBuf[1024],nameBuf[1024];
    int len = sizeof(SOCKADDR);


    while(1){

        sprintf(nameBuf,"%s: ",name);
        cout<<nameBuf;

        //发送
        cin>>sendBuf;
        sprintf(tempBuf,"%s: %s",name,sendBuf);
        sendto(client,tempBuf,strlen(tempBuf)+1,0,(SOCKADDR*)&addr,len);

        //读取
        recvfrom(client,recvBuf,1000,0,(SOCKADDR*)&addr,&len);
        cout<<recvBuf<<endl;

    }
}