nCr

#include<stdio.h>

long int fact(int p);
main()
{
    int n,r;
    float ncr;
    printf("enter n and r\n");
    scanf("%d%d",&n,&r);
    ncr=(float)(fact(n))/(fact(r)*fact(n-r));
    printf("ncr=%f",ncr);
}
long int fact(int p)
{
    long int f=1;
    int i;
    for(i=1; i<=p; i++)
    {
        f=f*i;
    }
    return f;
}

     

           

Note: Need to be arranged in compiler after copied

   

 OutPut:

enter n and r 5 3 ncr=10.000000