C++实现回声客户端_#e. 回声c++-优快云博客

本文链接：https://blog.youkuaiyun.com/chuuya1/article/details/120910957

这个示例展示了如何使用C++编程语言实现一个简单的TCP/IP服务器和客户端。服务器监听127.0.0.1的1503端口，接收客户端连接并回传接收到的消息。客户端则连接到服务器，发送用户输入的消息并打印服务器的响应。

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服务器

#include <stdio.h>
#include <winsock2.h>
#pragma comment (lib, "ws2_32.lib")  //加载 ws2_32.dll

int main() {
	WSADATA wsaData;
	WSAStartup(MAKEWORD(2, 2), &wsaData);
	SOCKET sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

	sockaddr_in addr;
	memset(&addr, 0, sizeof(addr));
	addr.sin_family = AF_INET;
	addr.sin_port = htons(1503);
	addr.sin_addr.s_addr = inet_addr("127.0.0.1");
	bind(sock,(struct sockaddr*)&addr, sizeof(addr));
	listen(sock, 20);

	SOCKADDR client_addr;
	int size = sizeof(client_addr);
	while (1)
	{
		SOCKET client = accept(sock, (SOCKADDR*)&client_addr, &size);
		char buffer[200];
		int len = recv(client, buffer, sizeof(buffer), 0);
		send(client, buffer, len, 0);
		memset(buffer, 0, sizeof(buffer));
		closesocket(client);
	}


	closesocket(sock);

	WSACleanup();
	//return 0;
}

客户端

#include <stdio.h>
#include <stdlib.h>
#include <WinSock2.h>
#include<iostream>
#include <string>
#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll
using namespace std;

int main() {
	WSADATA wsaData;
	WSAStartup(MAKEWORD(2, 2), &wsaData);

	sockaddr_in addr;
	memset(&addr, 0, sizeof(addr));
	addr.sin_family = AF_INET;
	addr.sin_port = htons(1503);
	addr.sin_addr.s_addr = inet_addr("127.0.0.1");

	char buffersend[200];
	char bufferrecv[200];
	while (1)
	{
		SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
		connect(sock, (SOCKADDR*)&addr, sizeof(addr));
		cout << "请输入消息：";
		gets_s(buffersend);
		send(sock, buffersend, sizeof(buffersend), 0);
		recv(sock, bufferrecv, sizeof(bufferrecv), 0);
		cout << "收到消息：" << bufferrecv << endl;

		memset(buffersend, 0, sizeof(buffersend));
		memset(bufferrecv, 0, sizeof(bufferrecv));
		closesocket(sock);
	}
	WSACleanup();
	//system("pause");
	//return 0;
}