import Foundation

import Foundation
import Glibc

struct Array2D: CustomStringConvertible {
var numberRows: Int
var numberCols: Int
var matrix: [Int]
var description: String = ""

init(numberRows: Int, numberCols: Int) {
self.numberRows = numberRows
self.numberCols = numberCols
matrix = Array(repeating: 0, count: numberRows * numberCols)
for d in 1...numberRows {
description += "(matrix[(d - 1) * numberCols...(d * numberCols) - 1]) \n"
}
}

func index(row: Int, col: Int) -> Int {
return (numberCols * (row - 1) + (col - 1))
}

func indexIsValid(row: Int, col: Int) -> Bool {
if col > numberCols || row > numberRows {
return false
} else {
return true
}
}

/* set(row: Int, col: Int, newValue) {
{
if indexIsValid(row: row, col: col) {
matrix[(row * numberCols) + col] = newValue
} else {
print("index is out of bounds")
exit(0)
}
}
}

}
get(row: Int, col: Int) -> Int {
return data[(index(row: row, col: col))]
}
*/

subscript(row: Int, col: Int) -> Int {
get {
if indexIsValid(row: row, col: col) {
return matrix[index(row: row, col:col)]
} else {
print("inxex is out of bounds")
exit(0)
}
}
set(newValue) {
if indexIsValid(row: row, col: col) {
matrix[index(row: row, col: col)] = newValue
description = ""
for d in 1...numberRows {
description += "(matrix[(d - 1) * numberCols...(d * numberCols) - 1]) \n"
}

} else {
print("index is out of bounds")
exit(0)
}
}
}

}

Managed to solve the problem of the custom string convertible (in a very non efficient way I am sure).
So now the code is working and doing what it should. Still not sure how to implement the get and set not inside subscript.