C++网络编程，能发送消息，接收不到消息

#include   <Winsock2.h>

#include   <stdio.h>

#include <string.h>

#include <windows.h>



int main() {

	WORD wVersionRequested;

	WSADATA wsaData;

	int err;



	wVersionRequested = MAKEWORD( 1, 1 );



	err = WSAStartup(wVersionRequested, &wsaData);

	if (err != 0) {

		return -1;

	}



	if (LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1) {

		WSACleanup();

		return -1;

	}

	SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);



	SOCKADDR_IN addrSrv;

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

	addrSrv.sin_family = AF_INET;

	addrSrv.sin_port = htons(6000);



	bind(sockSrv, (SOCKADDR*) &addrSrv, sizeof(SOCKADDR));



	listen(sockSrv, 5);



	SOCKADDR_IN addrClient;

	int len = sizeof(SOCKADDR);



	while (1) {

		SOCKET sockConn = accept(sockSrv, (SOCKADDR*) &addrClient, &len);

		printf("有客户连接过来了\n");



		send(sockConn, "SUCCESS", strlen("SUCCESS") + 1, 0);



		char recvBuf[100];

		recv(sockConn, recvBuf, 100, 0);

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



		memset(recvBuf, 0x0, 100 * sizeof(char));

		closesocket(sockConn);

	}

	return 0;

}