VC++ 用Socket持续接收数据的程序举例如下：
while(1) { //client receiving code
if ((numbytes = recv(sockfd, buf, MAXDATASIZE, 0)) == -1)
perror("recv");
}
buf[numbytes] = '\0';
printf("numbytes is %d\n", numbytes);
printf("client: received '%s'\n", buf);
}
以下是输出：
numbytes is 0
client: received '12345'
numbytes is 0
client: received '6'
numbytes is 0
client: received ''
numbytes is 0
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