GetStdHandle用法

#include <windows.h>
#include<stdio.h>
int main() {
    
    
	HANDLE hStdIn = GetStdHandle(STD_INPUT_HANDLE);
	HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
	DWORD nIn, nOut;
	BYTE buffer[2048];
	while (ReadFile(hStdIn, buffer, 2048, &nIn, NULL)
		&& (nIn != 0) &&
		WriteFile(hStdOut, buffer, nIn, &nOut, NULL)
		);
}