Here is a Way to Time a Piece of Code

#include <ctime> // or include <time.h>
....
int main( )
{
        clock_t startTime, endTime;
        startTime = clock( );

******************************
        Program segment to be timed
****************************
        endTime = clock( );
        endTime-startTime is the time it took.
}

You should repeat this for every sorting algorithm and for each array size.