CSocket之UDP編程

#include <Winsock2.h>

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

void main()

{

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 sersocket=socket(AF_INET,SOCK_DGRAM,0);

SOCKADDR_IN seraddr;

seraddr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);

seraddr.sin_family=AF_INET;

seraddr.sin_port=htons(5000);

bind(sersocket,(SOCKADDR*)&seraddr,sizeof(SOCKADDR));

SOCKADDR clientaddr;

int len=sizeof(SOCKADDR);

char revbuf[100];

char sendbuf[100];

recvfrom(sersocket,revbuf,100,0,(SOCKADDR*)&clientaddr,&len);

printf("%s\n",revbuf);

scanf("%s",&sendbuf);

sendto(sersocket,sendbuf,strlen(sendbuf)+1,0,(SOCKADDR*)&clientaddr,len);

closesocket(sersocket);

WSACleanup();

}

#include <stdio.h>

#include <Winsock2.h>

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

void main()

{

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 sockclient=socket(AF_INET,SOCK_DGRAM,0);

SOCKADDR_IN clientaddr;

clientaddr.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");

clientaddr.sin_family=AF_INET;

clientaddr.sin_port=htons(5000);

int len=sizeof(SOCKADDR);

char revbuf[100];

char sendbuf[100];

printf("請輸入內容：\n");

while(1)

{

scanf("%s",&sendbuf);

sendto(sockclient,sendbuf,strlen(sendbuf)+1,0,(SOCKADDR*)&clientaddr,len);

recvfrom(sockclient,revbuf,100,0,(SOCKADDR*)&clientaddr,&len);

printf("%s\n",revbuf);

}

closesocket(sockclient);

WSACleanup();

}

大同小異，CSocket只是進行了封裝而已，原理是壹樣的，編程要思路靈活才行。