C$++5\mathrm{.}37$ LAB: Remove all non$-$alphabetic characters $-$ functions

Write a program that removes all non$-$alphabetic characters from the given input.

Ex$.$ If the input is:

$-$Hello, $1$ world$$!$

the output is:

Helloworld

Your program must define and call the following function that takes a string as a parameter and returns the string without any nonalphabetic characters.

string RemoveNonAlpha $($string userString$)$

$5405083763314$ qx$3$zqy$?$

LAB ACTIVITY

$5\mathrm{.}37\mathrm{.}1$: LAB: Remove all non$-$alphabetic characters $-$ functions C$++$

$\frac{0}{10}$