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();
}

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