Processing an array

[whodgson]

The following code is twice as fast using 'max' rather than just 11 in the three loops. Could someone explain why this is so?

int main()
{
    int const max=11;
    int count=0,num=0;
    int a[]={2,3,5,7,6,1,4,9,8,2,5};
    //print array
    cout<<"\n\n";
    cout<<"the array is: \n";
    for(int i=0;i<max;i++)
    cout<<a[i]<<" ";
    //now find which integers are repeated
    for(int i=0;i<max;i++)
     {
       for(int j=0;j<max;j++)
          {
          if(a[j]==i)
          count++;
          }
        if(count<1)continue;
        if(count>num)num=count;
        cout<<"\nthere was "<<count<<" "<<i;
        count=0;
 
    }
 cout<<"\nthe most repeats was "<<num<<endl;
 
}

thanks in advance

[Banfa]

How did you measure this? Because over an iteration of 11 items I would have thought the difference would either be not measurable or not significant.

[whodgson]

I have just acquired code::blocks (am not very familiar)and it routinely publishes the execution time for a program although I`m not sure if this includes the screen writing time (hope not). In this case it said either 0.125 s(with 11) or 0.063 s (with max).

[Banfa]

Well I can't explain it and there seems no reason why is should be different for me.

Compiling and running in Code:Blocks (which I just happen to have installed) gives run times of 0.003s for both cases.

[whodgson]

OK thanks Banfa. I will look into it further.