用来限制 fps

#pragma once

#include <windows.h>

struct fps_limit {

	int previous_time;
	int tpf_limit;
	int tpf;

	fps_limit(int fps = 60) : previous_time(GetTickCount()), tpf(0) {
		limit_fps(fps);
	}
	void reset() {
		previous_time = GetTickCount(),
		tpf = 0;
		tpf_limit = 60;
	}
	void limit_fps(int fps) {
		tpf_limit = (int)(1000.0f / (float)fps);
	}
	void delay() {
		tpf = GetTickCount() - previous_time;

		if(tpf < tpf_limit)
			Sleep(tpf_limit - tpf - 1);

		previous_time = GetTickCount();
	}
};

test:

#include <iostream>
using namespace std;

#include "fps_limit.h"
int main() {
	fps_limit fps(60);
	int i = 0;
	while(1) {
		cout << i++ << " ";
		fps.do_limit();
	}
}