Condition issue with for loop

[Sanya]

Hi
I am a c++ beginer. I was testing some loops, when this problem occurred.
The code works perfectly fine while a<3
When a>=3 the two inner loop executes 1 more time, but it shouldnt.

cin>>a
for (int n=0 ; n<a; ++n)
{

    for(int sor=0; sor< pow(3,(n+1)); sor++)
    {

        for(int oszlop =0; oszlop<pow(3,(n+1)); oszlop++)
        {
            cout<<oszlop<< "/" << pow(3,(n+1))<<" ";
         }
        cout << endl;
    }
}

So i tested out like this:

cin>>a
for (int n=0 ; n<a; ++n)
{        q=pow(3,(n+1));
    for(int sor=0; sor< q; sor++)
    {
        w=pow(3,(n+1));
        for(int oszlop =0; oszlop<w; oszlop++)
        {
            cout<<oszlop<< "/" << pow(3,(n+1))<<" ";
        }
        cout << endl; }
}

And worked perfectly.
The question is: What was the problem with the firs solution?

[ats15]

It works fine for me. I just replaced 3 with 3.0. I wondering if it's a compiler problem. By the way, you should compute that value only once

cin>>a
for (int n=0 ; n<a; ++n)
{
    p=pow(3.0,n+1);
    for(int sor=0; sor< p; sor++)
    {

        for(int oszlop =0; oszlop<p; oszlop++)
        {
            cout<<oszlop<< "/" << p<<" ";
         }
        cout << endl;
    }
}