stdiotest.c

#include <windows.h>

int main(int argc, char *argv[])
{
	HANDLE hstdin = GetStdHandle(STD_INPUT_HANDLE);
	HANDLE hstdout = GetStdHandle(STD_OUTPUT_HANDLE);
	char buf[256];
	DWORD cb;

	ReadFile(hstdin, buf, sizeof(buf), &cb, NULL);
	WriteFile(hstdout, buf, cb, &cb, NULL);
}