Find factorial of n!(n-r)! and n!(n-r)!r! where r and given by user

#include<stdio.h>

double factorial(int num)

{

       unsigned i;

       double fact=1;

       for(i=num;i>1;i--)

       fact=fact*i;

       return fact;

}

//double factorial(int num);

main()

{

      int n,r;

      double val1,val2;

      printf("Enter 2 integers numbers (n and r) :");

      scanf("%d%d",&n,&r);

      val1=factorial(n)/(factorial(n-r));

      val2=factorial(n)/(factorial(n-r)*factorial(r));

      printf("%d!/(%d-%d)! = %f\n",n,n,r,val1);

      printf("%d!/(%d-%d)!%d! = %f\n",n,n,r,r,val2);

      getch();

}