socket

//#include "pch.h"
#include
#include

#include 
#include 
#include 
#include  
using namespace std;

#pragma comment(lib,"ws2_32.lib")
using namespace std;
void initialization();
int main() {
	//定义长度变量
	int send_len = 0;
	int recv_len = 0;
	//定义发送缓冲区和接受缓冲区
	char send_buf[100];
	char recv_buf[100];
	//定义服务端套接字，接受请求套接字
	SOCKET s_server;
	//服务端地址客户端地址
	SOCKADDR_IN server_addr;
	initialization();
	//填充服务端信息
	server_addr.sin_family = AF_INET;
	server_addr.sin_addr.S_un.S_addr = inet_addr("192.168.0.5");
	server_addr.sin_port = htons(8080);//根据自己的端口改变
	//创建套接字
	s_server = socket(AF_INET, SOCK_STREAM, 0);
	if (connect(s_server, (SOCKADDR *)&server_addr, sizeof(SOCKADDR)) == SOCKET_ERROR) {
		cout << "服务器连接失败！" << endl;
		WSACleanup();
	}
	else {
		cout << "服务器连接成功！" << endl;
	}

	//发送,接收数据
	while (1) {
		cout << "请输入发送信息:";

		//读json文件//
		//std::ifstream t("text.json");
		//std::stringstream buffer;
		//buffer << t.rdbuf();
		//std::string contents(buffer.str());

		//int len = contents.length();
		//std::cout << len << std::endl;
		//std::string base;
		//base.assign((char*)&len, sizeof(int));//memcpy
		//base += contents;
		///

		//传byte
		std::string contents1;
		std::string contents2;
		std::string contents3;


		contents1.assign(50, 'c');
		contents2.assign(150, 'c');
		contents3.assign(550,'c');

		int len1 = contents1.length();
		int len2 = contents2.length();
		int len3 = contents3.length();

		std::string base0;
		base0.assign((char*)&len1, sizeof(int));//memcpy
		base0 += contents1;
		base0.append((char*)&len2, sizeof(int));//memcpy
		base0 += contents2;
		base0.append((char*)&len3, sizeof(int));//memcpy
		base0 += contents3;
		std::cout << base0.length() << std::endl;

		




		send_len = send(s_server, (const char*)base0.c_str(), base0.length(), 0);
		if (send_len < 0) {
			cout << "发送失败！" << endl;
			break;
		}
		recv_len = recv(s_server, recv_buf, 100, 0);
		if (recv_len < 0) {
			cout << "接受失败！" << endl;
			break;
		}
		else {
			cout << "服务端信息:" << recv_buf << endl;
		}

	}
	//关闭套接字
	closesocket(s_server);
	//释放DLL资源
	WSACleanup();
	return 0;
}
void initialization() {
	//初始化套接字库
	WORD w_req = MAKEWORD(2, 2);//版本号
	WSADATA wsadata;
	int err;
	err = WSAStartup(w_req, &wsadata);
	if (err != 0) {
		cout << "初始化套接字库失败！" << endl;
	}
	else {
		cout << "初始化套接字库成功！" << endl;
	}
	//检测版本号
	if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wHighVersion) != 2) {
		cout << "套接字库版本号不符！" << endl;
		WSACleanup();
	}
	else {
		cout << "套接字库版本正确！" << endl;
	}
	//填充服务端地址信息

}```