Using C++ create a program that is composed of five files to calculate the determinant of a user-entered square matrix. The program will have two functions, each with its own header file and source code (.hpp and .cpp) and a main file to run everything.

The matrix will be square and the size will be 2x2 or 3x3. The first function is readMatrix(). It will have two parameters: a pointer to a 2D array and an integer as the size of the matrix. It will prompt the user to fill a square matrix and store the input into the 2D array. The second function is determinant(). It will have 2 parameters: a 2D array and an integer, which is the size of the square. It will return an integer value with is the determinant of the matrix stored in the 2D array.

In the main file, you will create a program that ask users to choose the size of the matrix (2x2 or 3x3), then uses readMatrix() to prompt the user to enter 4 or 9 values to fill the array, calculate the determinant using determinant(), and display both the array and the determinant to the user. The array should not be displayed in a single line but in a square format.