WAP to find the sum of following series using function.

1 + 2^2/2! + 3^3/3! + - - - - - -  - - - + n^2/n!

CODE ::

#include <stdio.h>
long int fact(int n);
long int p(int n);
int main ()
{
    double sum=0;
    int i,n;
    printf("Enter term N = ");
    scanf("%d",&n);

    for(i=1;i<=n;i++)
        sum = sum + (double)p(i)/(double)fact(i);

    printf("%lf\n",sum);
    return 0;
}
long int fact (int n)
{
    int i,res=1;
    for(i=n;i>=1;i--)
        res = res*i;

    return res;
}
long int p (int n)
{
    return n*n;
}