client.cpp

socket通讯程序

#include"Winsock.h"
#include"Windows.h"
#include"stdio.h"
#pragma comment(lib,"wsock32.lib")
#define RECV_PORT 2000
#define SEND_PORT 3000

SOCKET sock;
SOCKADDR_IN ServerAddr;


DWORD StartSock()
{
   WSADATA WSAData;
   if(WSAStartup(MAKEWORD(2,2),&WSAData)!=0)  //初始化套接字
   {
	   printf("sock init fail!\n");
	   return(-1);
   }
   ServerAddr.sin_family=AF_INET;     //填充服务器地址及其端口号
   ServerAddr.sin_addr.s_addr=inet_addr("59.74.24.138");
   ServerAddr.sin_port=htons(RECV_PORT);
   return(1);
}

DWORD CreateSocket()
{
	sock=socket(AF_INET,SOCK_STREAM,0);  //创建套接字
	if(sock==SOCKET_ERROR)
	{
		printf("sock create fail!\n");
		WSACleanup();
		return(-1);
	}
	return(1);
}





DWORD CallServer()  //呼叫服务器，请求链接
{
	CreateSocket();
	if(connect(sock,(struct sockaddr*)&ServerAddr,sizeof(ServerAddr))==SOCKET_ERROR)
	{

		printf("Connect fail\n");
		closesocket(sock);
	}
	return(1);
}


DWORD TCPSend(char data[])   //向服务器发送数据
{
	int length;
	length=send(sock,data,strlen(data),0);
	if(length<=0)
	{
		printf("send data error!\n");
     	closesocket(sock);
		WSACleanup();
		return(-1);
	}
	return(1);
}



int main()
{
	char buff[80];
	int num,i;
	StartSock();
	while(CallServer()==-1);
	printf("connectok!\n");
    printf("press any key to send!\n");
	getchar();
	for(;;)
	{
		printf("Input the number of message to send:(0--exit)");
		memset(buff,0,80);
		scanf("%d",&num);
		if(num<=0)
		break;
		for(i=0;i<num;i++)
		{
			sprintf(buff,"data%d",i);
			printf(buff);
			printf("\n");
			TCPSend(buff);
			Sleep(100);
		}
	}
	return(0);
}