#include  <iostream>
#include  <math.h>
#include  <time.h>
#include  <Windows.h>

using namespace std;

//based on:
//  http://stackoverflow.com/questions/19378805/measure-cpu-time-on-windows-using-getprocesstimes
static double cpuTime ( void ) {
    FILETIME  createTime, exitTime, kernelTime, userTime;

    if (GetProcessTimes( GetCurrentProcess(), &createTime, &exitTime,
                                      &kernelTime, &userTime ) != -1) {
        SYSTEMTIME  userSystemTime;
        if (FileTimeToSystemTime( &userTime, &userSystemTime ) != -1)
            return (double) userSystemTime.wHour   * 3600.0 +
                   (double) userSystemTime.wMinute    *     60.0 +
                   (double) userSystemTime.wSecond +
                   (double) userSystemTime.wMilliseconds / 1000.0;
    }
    return -1;
}