post-incremented when?

Code:

#include <iostream>
using namespace std;

int main()
{

 unsigned long factorial = 1,
               number = 0;

  cout <<" Enter number " ; // entered 12 as number
  cin >> number;

  for ( int counter = number; counter >= 1; counter -- )     // post increment counter
      factorial *= counter;    // value of counter is 12 * 12 ?

      cout << " " << factorial;   // answer



      return 0;
}

Hi i was wondering in the for structure where i have counter--.
And i have then counter * counter ,
does it multiply 12 * 12 ? or 12 * 11 and when does it get post decremented?

Thanks alot.

Add some cout lines and see for yourself

Code:

for ( int counter = number; counter >= 1; counter -- )
{
  cout << "counter : " << counter endl 
       << "factorial before: " << factorial <<endl;
  factorial *= counter;
  cout << "factorial after: " << factorial <<endl;
}

Also, this: -- is decrement. This: ++ is increment.

Hi hammer thanks alot i wrote wrong word.
I will try what you said

Ok here is output.

Enter number 12
1st 12
2nd 12
3rd 12
1st 11
2nd 132
3rd 11
1st 10
2nd 1320
3rd 10
1st 9
2nd 11880
3rd 9
1st 8
2nd 95040
3rd 8
1st 7
2nd 665280
3rd 7
1st 6
2nd 3991680
3rd 6
1st 5
2nd 19958400
3rd 5
1st 4
2nd 79833600
3rd 4
1st 3
2nd 239500800
3rd 3
1st 2
2nd 479001600
3rd 2
1st 1
2nd 479001600
3rd 1

Program exited normally.
(gdb)

Looks good .

Thanks alot for idea.