虽然C#里已经很方便了,但是直接封装成静态类,更为方便,

//C++

#include <ctime>
class Timer
{
public:
	Timer();
	double elasped_time();
	void reset();
private:
	clock_t start_time;
};
#include	"Timer.h"

Timer::Timer()
{
	start_time = clock();
}

double Timer::elasped_time()
{
	clock_t end_time = clock();
	return ((double)(end_time - start_time))/((double)CLK_TCK);
	//return end_time - start_time;
}

void Timer::reset()
{
	start_time = clock();
}
//C#
public class RoeClock
 {
  static long start_time;
  static long end_time;
  const int TicksPerSencond = 10000000;//每刻度为10微秒
  private RoeClock()
  {

  }
  public static void Start()
  {
   Console.WriteLine();
   Console.WriteLine("计时开始!");
   start_time = DateTime.Now.Ticks;
   
  }
  public static void Reset()
  {
   start_time = DateTime.Now.Ticks;
  }
  public static void Print()
  {
   double time;
   end_time = DateTime.Now.Ticks;
   time = (double)(end_time - start_time)/(double)TicksPerSencond;
   Console.WriteLine();
   Console.WriteLine("耗时 "+time+" 秒.");
  }
 }