// Example 7.4. Program to print factorials for integers 0-16

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
   double factorial(int n);

   const int MAX_INDEX = 16;

   cout << " Table of Factorials" << endl;
   cout << "Number\t\tFactorial" << endl;
   cout << "------\t\t---------" << endl << endl;

   for (int n = 0; n <=	 MAX_INDEX; ++n)
	cout << setw(4) << n << setprecision(0)
	     << setw(19) << factorial(n) << endl;

   return 0;
}

//
// Function to return the factorial of a parameter as a double
// Pre:  n is a nonnegative integer.
// Post: n! was returned as a double.
//

double factorial(int n)
{
   double fact; 	 // n!

   fact = 1;             // 0! = 1! = 1
   for (int i = n; i > 1; --i)
	fact *= i;

   return fact;
}