Thread: Factorial program

Hi Guys I am trying to make a program that reads in 10 values, calculates
the factorial values ie: !5 = 5 * 4 * 3 * 2 * 1 then prints them out in a tabular format. I have got the basis of it down but its giving me the incorrect output.

The program does compile. I think my mistake, is variable 'b' which holds the calculated value should really be an array as well? Or am I thinking the logic totally wrong?

Here is what I have come up with:

Code:

#include <iostream>
#include <iomanip>

// main function - begins program execution ////////////////////////////////////
//
int main ( void )
{
   const int ARRAY_SIZE = 10;
   
   int fact[ ARRAY_SIZE ] = { 0 };
   int b = 1;
   
   std::cout << "Enter a number: ";
   
   for ( int i = 0; i < ARRAY_SIZE; i++ )
   {
      std::cin >> fact[ i ];
   
      for ( int x = 1; x <= fact[ i ]; x++ )
      {
         b = b * x;
      }
   }
   
   std::cout << "Number" << std::setw( 12 ) << "FACTORIAL\n\n";
   
   for ( int i = 0; i < ARRAY_SIZE; i++ )
   {
      std::cout << fact[ i ] << std::setw( 17 ) << b << std::endl;
   }
   
   std::cin.get(); // freeze console output window
   std::cin.ignore();
      
   return 0; // return value from int main
}

Yes, b needs to be stored in an array as well.