Write a function that accepts a pointer to a C$-$string as its argument. The function should count the number of vowels appearing in the string and return that number.

Write another function that accepts a pointer to a C$-$string as its argument. This function should count the number of consonants appearing in the string and return that number.

Demonstrate these two functions in a program that performs the following steps:

$1.$ The user is asked to enter a string.

$2.$ The program displays the following menu:

A$)$ Count the number of vowels in the string

B$)$ Count the number of consonants in the string

C$)$ Enter another string

D$)$ Exit the program

$3.$ The program performs the operation selected by the user and repeats until the user selects D to exit the program.