Computing CPU time in C++ on Windows

Question

Is there any way in C++ to calculate how long does it take to run a given program or routine in CPU time?

I work with Visual Studio 2008 running on Wind

Answer 1

Here's one way. It measures routine exeution time in milliseconds.

clock_t begin=clock(); starts before the route is executed and clock_t end=clock(); starts right after the routine exits.

The two time sets are then subtracted from each other and the result is a millisecod value.

#include 
#include 
#include 
using namespace std;

double get_CPU_time_usage(clock_t clock1,clock_t clock2)
{
    double diffticks=clock1-clock2;
    double diffms=(diffticks*1000)/CLOCKS_PER_SEC;
    return diffms;
} 

void test_CPU_usage()
{
  cout << "Standby.. measuring exeution time:  ";

  for (int i=0; i<10000;i++)
  {
        cout << "\b\\" << std::flush;
        cout << "\b|" << std::flush;
        cout << "\b/" << std::flush;
        cout << "\b-" << std::flush;
  }

  cout << " \n\n";
}

int main (void)
{

    clock_t begin=clock();

    test_CPU_usage();

    clock_t end=clock();

    cout << "Time elapsed: " << double(get_CPU_time_usage(end,begin)) << " ms ("<