socket为什么第二次发送没反应

#include<iostream>

#include<stdio.h>   

#include<Winsock2.h>   

#include<string.h>   

#pragma   comment(lib,   "WS2_32.LIB")

using   namespace   std;

void main()   

{   

	

	char   buffsend[100]; 

	char buffrecv[100];

	SOCKET   clientsocket;   

	SOCKADDR_IN   serveraddr;   

	WSADATA   wsaData;   

	WSAStartup(MAKEWORD(2,2),&wsaData);   

	clientsocket=socket(AF_INET,SOCK_STREAM,0);   

	Sleep(2000);   

	if(clientsocket==INVALID_SOCKET)   

	{   

	printf("create   clientsocket   failed\n");   

	exit(0);   

	}   

	serveraddr.sin_family   =   AF_INET;

	int port = 12345;

	serveraddr.sin_port   =   htons(port);           

	serveraddr.sin_addr.s_addr   =   inet_addr("127.0.0.1");   

	int   result=connect(clientsocket,(SOCKADDR   *)&serveraddr,sizeof(serveraddr));   

	Sleep(2000);   

	if(result==-1)   

	{   

	printf("connect   server   failed\n");   

	exit(0);   

	} 

	while(true)

	{

		

		cout<<"连接状态::"<<result<<endl;

		

		cout<<"输入数据:"<<endl;

		cin>>buffsend;

		result=send(clientsocket,buffsend,100,0);

		if(result == -1)

		{

			cout<<"发送失败"<<endl;

		}



		Sleep(1000);

		recv(clientsocket,buffrecv,sizeof(buffrecv)/sizeof(char),0);

		cout<<"收到服务器回复:"<<buffrecv<<endl;

		

	}

	Sleep(2000);

	system("pause");

}