Combination using Mathematical formula C(n , r)

/* Write a program to find Number of Combination using Mathematical formula  C(n , r) */

#include<stdio.h>
#include<conio.h>
void main()
{
int fact(int);
int ncr ;
long n , r ;
printf("\n Enter the value of  n & r ");
scanf("%d%d",&n,&r);
ncr = fact(n)/( fact(r)*fact(n-r)) ;
printf("\n The nCr = %d ",ncr);
getch();

}

int fact(int n)
{
  int i;
  long facto = 1;
  for(i=1; i <= n ;i++)
  {
     facto = facto*i ;
  }
  
  return(facto);
}

Tweet