/*
   testrep5.cpp
   CIS 150
   6/10/2008
   David Klick
  
   Demonstration of accumulator (for product).
*/

#include <iostream>
using std::cout;
using std::cin;

void cont();

int main() {
   int ctr;   // loop counter
   int fact;  // accumulator for factorial
   int num;   // number user enters
   
   // ask user for number to get factorial of
   cout << "Enter an integer (1 through 10): ";
   cin >> num;
   if (num<1 || num>10) {
      cout << "Error: Input out of range\n";
   } else {
      // calculate factorial
      fact = 1;
      for (ctr=2; ctr<=num; ctr++) {
         fact *= ctr;
      }
      cout << "The factorial of " << num
           << " is " << fact << '\n';
   }

   cont();
   return 0;
}

void cont() {
   if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
   cout << "Press enter to continue...";
   cin.get();
}

/*
   Sample output:

   Enter an integer (1 through 10): 7
   The factorial of 7 is 5040   
*/