做个闹钟吧

#include <windows.h>
using namespace std;
int main() {
	MessageBox(NULL, "工作40分钟", "提示", MB_OK);
	Sleep(2400000);
	if(MessageBox(NULL, "少爷，该休息啦", "提示", MB_YESNO|MB_ICONINFORMATION) == IDYES)
		MessageBox(NULL, "那就赶紧休息去！", "提示", MB_OK|MB_ICONINFORMATION);
	else {
		if (MessageBox(NULL, "认错不？", "抉择", MB_YESNO|MB_ICONINFORMATION) == IDYES)
			MessageBox(NULL, "算你识趣！", "危机解除", MB_OK);
		else {
			MessageBox(NULL, "没法子,只能关机了", "强制关机", MB_OK|MB_ICONINFORMATION);
			system("shutdown -s -t 0");
		}
	}
	return 0;
}