C Program to Find ncR nPr

/* C Program - Find ncR and nPr */

#include<stdio.h>
#include<conio.h>
long int fact(int);   //function declaration
void main()
{
clrscr();
int n, r;
long int ncr, npr;
printf("Enter the value of n : ");
scanf("%d",&n);
printf("Enter the value of r : ");
scanf("%d",&r);
npr=fact(n)/fact(n-r);    // calling the function or function calling
ncr=npr/fact(r);          //function calling
printf("NPR value = %ld\n",npr);
printf("NCR value = %ld\n",ncr);
getch();
}
long int fact(int x)          //defining the function or function definition
{
int i, f=1;
for(i=2; i<=x; i++)
{
f=f*i;
}
return f;
}