Question $2$

$(16$ marks $)$

Write a $C++$ program that uses nested for$-$loops to display a square of stars. The program should ask the user to enter an integer number $n$ representing the number of rows$/$columns in the square. The number $n$ should be between $1$ and $100$ inclusive. Appropriate error message should be displayed if the user input for $n$ is invalid then exit program.

The program should display a square of size $n$ filled with the character $\text{'}{?}^{**}\text{'}.$ The first row and first column of the square are exceptional and will equal the value of $n.$

Example

If the number $n$ is $5$ then the square should be:

$55555$

$5********$

$5********$

$5********$

$5********$