C program to find ncr and npr

C program to find nCr and nPr: This code calculate nCr which is n!/(r!*(n-r)!) and nPr = n!/(n-r)!

C program to find nCr using function

long factorial(int);
long find_ncr(int, int);
long find_npr(int, int);
   int n, r;
   long ncr, npr;
   printf("Enter the value of n and r\n");
   ncr = find_ncr(n, r);
   npr = find_npr(n, r);
   printf("%dC%d = %ld\n", n, r, ncr);
   printf("%dP%d = %ld\n", n, r, npr);
   return 0;
long find_ncr(int n, int r)
   long result;
   result = factorial(n)/(factorial(r)*factorial(n-r));
   return result;
long find_npr(int n, int r)
   long result;
   result = factorial(n)/factorial(n-r);
   return result;
long factorial(int n)
   int c;
   long result = 1;
   for( c = 1 ; c <= n ; c++ )
      result = result*c;
   return ( result );

Download NCR and NPR program.

Output of program:
NCR and NPR c program