This program is for the conversion of Roman Numerals.

You will need to create a menu driven program such as:

Convert a Roman Numeral to an Integer

Convert an Integer to a Roman Numeral

Exit the Program

Menu Choice $1$

You will need to write a function that will take as input from the user a c $-$string that is a roman numeral. The program should then have a function that validates that the user entered valid characters either upper or lower case. $($If the user does not enter a valid roman numeral you will need to display an error message and prompt for them to re$-$enter the roman numeral.$)$ Then you will need a function that will convert the valid input to uppercase prior to being passed to a function that converts it to an integer and displays the answer.

Menu Choice $2$

You will need a function that takes from the user an integer. You will need to validate the users input to make sure it has a value greater than zero and a value smaller than the largest roman numeral that can, be created based upon the rules. $($If the user does not enter a valid roman numeral you will need to display an error message and prompt for them to re$-$enter the integer.$)$ Then you will need a function that converts the integer to a proper roman numeral storing the result in a cstring.

Remember though this is trickier because IV is $4$ not IIII.

Menu Choice $3$

Lets the program end.