High Precision Timer for Windows

HPTimer.hpp

#include <windows.h>

class HPTimer
{
public:
    HPTimer( std::string name ) : total(0.0), name_(name)
    {
    }

    void reset()
    {
        total = 0.0;
    }

    void start()
    {
        QueryPerformanceCounter(&start_);
    }

    void stop()
    {
        QueryPerformanceCounter( &end_ );
        QueryPerformanceFrequency( &frequency );
        total += (double)( end_.QuadPart - start_.QuadPart ) / frequency.QuadPart;
    }

    void show()
    {
        char text[200];
        sprintf( text, "%f", get_total() );
        MessageBox( 0, text, name_.c_str(), MB_OK );
    }

    double get_total()
    {
        return total;
    }

private:
    LARGE_INTEGER frequency;
    LARGE_INTEGER start_;
    LARGE_INTEGER end_;
    double        total;
    std::string   name_;
};

profile.cpp

func()
{
    // Your code is here
    
    HPTimer timer( "Cumulative time" );
    
    timer.start();
    // Your code is here too
    timer.stop();

    timer.start();
    // Your code is here too
    timer.stop();
    
    // and here
    
    timer.show();
}