代码运行时间

c++

1)GetTickCount()

#inlcude <windows.h>
int main()
{
  DWORD start_time = GetTickCount();
  {
    //code
  }
  DWORD end_time = GetTickCount();
  cout << "running times:" << end_time-start_time << "ms" << endl;
  return 0;
}

　　

2)clocl()

#include <time.h>
int main()
{
  clock_t start_time = clock();
  {
   //code
  }
  clock_t end_time = clock();
  cout << "running time:" << static_cast<double>(end_time-start_time)/CLOCK_PER_SEC*1000 << "ms" << endl;
  return 0;
}