select标准输入句柄出错

[luhaoting110]

为什么select标准输入句柄出错啊 ，日了够了

[LubinLew]

#include <windows.h>
#include <iostream>
#include “winsock2.h”
#pragma comment(lib, "ws2_32.lib")


int main(void)
{
	char buf[10] = "";
	fd_set rdfds;
	struct timeval tv;
	int ret = 0;

	WSADATA wsa;
	WSAStartup(MAKEWORD(2, 2), &wsa);

	FD_ZERO(&rdfds);
	FD_SET(0, &rdfds);
	tv.tv_sec = 3;
	tv.tv_usec = 500;

	//A successful WSAStartup call must occur before using this function.
	ret = select(1, &rdfds, NULL, NULL, &tv);
	if (SOCKET_ERROR == ret)
	{// error occurred
		std::cout << "Error Code = "<< WSAGetLastError() << std::endl;
	}
	else if (0 == ret)
	{// the time limit expired

	}
	else //success
	{//ret = the total number of socket handles that are ready and contained in the fd_set structures
	}

	return 0;
}

运行结果： Error Code = 10038 //An operation was attempted on something that is not a socket. 说明windows下的select函数只能操作socket的文件描述符