Recursive Factorial Example Program

#include <iostream.h>

int factorial(int);
int  main() {
 int number=5;
 
 
 if (number < 0)
  cout << "That is not a positive integer.\n";
 else
  cout << number << " factorial is: " << factorial(number) << endl;
}

int factorial(int number) {
 int temp;

 if(number <= 1) return 1;

 temp = number * factorial(number - 1);
 return temp;
}