Write A Program for calculating NCR value

# include<stdio.h>

#include<conio.h>

void main ( )          

{

int n, r, ncr, a, b, c, i;

clrscr ( ) ;

a = b = c = 1;

printf ( “enter n, r values”);

scanf ("%d%d”, & n , & r);

for ( i = 1; i <= n; i++)

a = a*i;

for ( i = 1; i <= r; i++)

b = b *i;

for ( i = 1; i < = ( n-r); i++)

c= c*i;

ncr = a/b*c;

printf (“\n NCR value is % d”, ncr);

getch ( );

}