In a file called Etox.cpp$,$ implement the following function:

double etox$\_5\_$terms$($double x$)$;

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It should return the value of e

x back to its caller. This value should be calculated as the sum of exactly

the first five terms in its expansion below:

e

x $=1+$ x $+$ x

$2/2!+$ x

$3/3!+...$

where n$!$ is the factorial of n$,$ which is the product of all positive integers at most equal to n$.$

You would therefore return the result of the calculation:

$1+$ x $+$ x

$2/2!+$ x

$3/3!+$ x

$4/4!$

Keep it simple and don't overcode. No need to write a function for calculating factorials. Simply use

numeric literals in their place.