How to calculate the value of e^x using series (C++)

Value of e^x

vofex() returns the value of e^x without using built-in function and it takes 1 parameter as x.

Code

#include "stdafx.h"

#include "iostream"

#include "conio.h"

#include "iomanip"

#include "math.h"

using namespace std;

double factorial(long number)

{

double factorial=1;

 for(int i=number;i>0;i--)

  factorial=factorial*i;

return factorial;

}

double vofex(double x)

{

       double sum=1;

  

       for(int i=1;i<11;i++)

              sum=sum+(pow(x,i)/factorial(i));

return sum;

}

int main()

{

       cout << vofex ( 2.0 ) << endl ;

       _getche();

       return 0;

}

Output

7.38899