Problem in writing this program

Question

Please can anyone help me in writing this program, i am a student 
Write a C++ program that reads a real variable x, integer variable N, and computes its exponential e^x using the formula:
 Ex =  1 + x +
x^2/2! + x^3/31 + x^4/4! + x^5/5 +...+ x^N/N!  (for N ≤ 10).
Your program should define a function that computes factorial, which is called in the main function.
Thanks

Answer 1

Hi Kanayo
The following program does
      total = x*0 +  x*1 + x*2 + x*3 + x*4 ...+x*N
You may modify it for your formula. Use a recursive function or 'for' loop to compute a factorial.
Regards
Chong
#include "stdafx.h"
#include <iostream>
using namespace std;
int N;
double x;
float Fn( int n)
 double total=0.0;
 if (n<N)total= Fn(n+1);
 return(total+=x*n);
int main()
 //double x;
 //int N;
 cout<<"Enter x: "; cin >>x;
 cout<<"Enter N: "; cin >>N;
 double total=Fn(0);
 cout<<total<<"\n";