春夏秋冬

摘要： #pragma onceclass StopWatch{private: int _freq; LARGE_INTEGER _begin; LARGE_INTEGER _end;public: float costTime; //用时,*1000000 = 微秒, 1秒=1000000 StopWatch(void) { LARGE_INTEGER tmp; QueryPerformanceFrequency(&tmp); _freq = tmp.QuadPart; costTime = 0; } ~StopWatch(void) { } void Start(... 阅读全文