2021-7: Can You Feel the Magic?

Wikipedia states that, in recreational mathematics, a square array of numbers, usually positive integers, is called a magic square if the sums of the numbers in each row, each column, and both main diagonals are the same.

Write code to test whether an array is a magic square. The code must:

- have an argument that is a square matrix of integers (not necessarily all positive integers)

- return 1 if the array represents a magic square, otherwise return 0