网络编程这结构体发送

client

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#include <winsock2.h>
#include <windows.h>
#include <stdio.h>
#include <memory>

#pragma pack(1)
#pragma comment(lib,"ws2_32.lib")

typedef struct MSG_def {
	int num;
	char buf[256];
	MSG_def() {
		num = 0;
		memset(buf, 0, 256);
	}
}MyMsg;


int main(int argc, char* argv[])
{
	WORD sockVersion = MAKEWORD(2, 2);
	WSADATA data;
	if (WSAStartup(sockVersion, &data) != 0)
	{
		return 0;
	}

	SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (sclient == INVALID_SOCKET)
	{
		printf("invalid socket !");
		return 0;
	}

	struct sockaddr_in serAddr;
	serAddr.sin_family = AF_INET;
	serAddr.sin_port = htons(8888);
	serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
	if (connect(sclient, (struct sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
	{
		printf("connect error !");
		closesocket(sclient);
		return 0;
	}
	MyMsg msg;
	msg.num = 25;
	sscanf("测式文本","%s",msg.buf);

	send(sclient, (char*)&msg, sizeof(MSG), 0);
	printf("%s","发送完成
");
	closesocket(sclient);
	WSACleanup();
	return 0;
}

server

#include <winsock2.h>
#include <stdio.h>
#include <memory>

#pragma pack(1)
#pragma comment(lib,"ws2_32.lib")

typedef struct MSG_def{
	int num;
	char buf[256];
	MSG_def(){
		num = 0;
		memset(buf, 0, 256);
	}
}MyMsg;

int main(int argc, char* argv[])
{
	//初始化WSA
	WORD sockVersion = MAKEWORD(2, 2);
	WSADATA wsaData;
	if (WSAStartup(sockVersion, &wsaData) != 0){
		return 0;
	}

	//创建套接字
	SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (slisten == INVALID_SOCKET){
		printf("socket error !");
		return 0;
	}

	//绑定IP和端口
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(8888);
	sin.sin_addr.S_un.S_addr = INADDR_ANY;
	if (bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR){
		printf("bind error !");
	}

	//开始监听
	if (listen(slisten, 5) == SOCKET_ERROR){
		printf("listen error !");
		return 0;
	}

	//循环接收数据
	SOCKET sClient;
	struct sockaddr_in remoteAddr;
	int nAddrlen = sizeof(remoteAddr);
	printf("等待连接...
");
	sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
	while (1){
		char revData[2048];
		if (sClient == INVALID_SOCKET){
			printf("accept error !");
			continue;
		}

		//接收数据
		printf("等待接收...
");
		int ret = recv(sClient, revData, 2048, 0);
		//printf(ret);
		if (ret > 0){
			MyMsg* pmsg = (MyMsg*)revData;
			printf("num -> %d
",pmsg->num);
			printf("buf -> %s
",pmsg->buf);

		}
		printf("数据接收完成...
");

		printf("等待连接...
");
		sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
	}
	closesocket(sClient);
	closesocket(slisten);
	WSACleanup();
	return 0;
}