Question $4$:

Define the following constants:

const int FLOOR$\_$ROUND $=1$;

const int CEILING$\_$ROUND $=2$;

const int ROUND $=3$;

Write a program that asks the user to enter a Real number, then it asks the user to enter the method by which they want to round that number $($floor$,$ ceiling or to the nearest integer$).$ The program will then print the rounded result.

Your program should interact with the user exactly as it shows in the following example: Please enter a Real number:

$4\mathrm{.}78$

Choose your rounding method:

Floor round

Ceiling round

Round to the nearest whole number

$2$

$5$

Implementation requirements:

Use a switch statement.

You are not allowed to include and use the math library.