Shahin's Problem

#include <stdio.h>
#include<math.h>
/*
input , n = 3
output
1^2 / 1! + 2^2 / 2! + 3^2 / 3! = 4.5 ;

*/
int main(){
    int f = 1,n,i,j;
    float sum = 0.0;
    printf("enter the number : ");
    scanf("%d",&n);

    for(j=1;j<=n;j++){
    // 1. calculate factorial of j;
    f *= j;
    // 2. add the new term to the previous term;
        sum = sum + (pow(j, 2) / (float)f);
    }
    printf("Sum = %f\n",sum);

    return 0;
}