实验二 UDP通信实验 试验报告(3)

（2）UDPClient

#include<iostream.h>

#include <winsock2.h>

#include <stdio.h>

#pragma comment(lib,"WS2_32")

class CInitSock

{

public:

CInitSock(BYTE minorVer=2,BYTE majorVer=2)

{

WSADATA wsaData;

WORD sockVersion=MAKEWORD(minorVer,majorVer);

if(::WSAStartup(sockVersion,&wsaData)!=0)

{

exit(0);

}

}

~CInitSock()

{

::WSACleanup();

}

};

CInitSock initSock; // 初始化Winsock库

int main()

{

// 创建套节字

SOCKET s = ::socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

if(s == INVALID_SOCKET)

{

printf("Failed socket() %d \n", ::WSAGetLastError());

return 0;

}

// 也可以在这里调用bind函数绑定一个本地地址

// 否则系统将会自动安排

// 填写远程地址信息