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OOP/Java/Lab/Week4/MagicSquareCheck.java

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+import java.util.Scanner;
+
+class MagicSquareCheck {
+
+    public static void main(String args[]) {
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter the dimension of the square matrix: ");
+        int n = sc.nextInt();
+        int a[][] = new int[n][n];
+        for (int i = 0; i < n; i++) {
+            for (int j = 0; j < n; j++) {
+                System.out.print(
+                    "Enter the element at (" + i + "," + j + "): "
+                );
+                a[i][j] = sc.nextInt();
+            }
+        }
+
+        // sum of the first row (to have a baseline sum)
+        int sum = 0;
+        for (int j = 0; j < n; j++) {
+            sum += a[0][j];
+        }
+
+        // rows, columns, and diagonals
+        boolean isMagicSquare = true;
+        int diag1 = 0, diag2 = 0;
+
+        for (int i = 0; i < n; i++) {
+            int rowSum = 0, colSum = 0;
+            diag1 += a[i][i];
+            diag2 += a[i][n - 1 - i];
+
+            for (int j = 0; j < n; j++) {
+                rowSum += a[i][j];
+                colSum += a[j][i];
+            }
+
+            if (rowSum != sum || colSum != sum) {
+                isMagicSquare = false;
+                break;
+            }
+        }
+
+        if (diag1 != sum || diag2 != sum) {
+            isMagicSquare = false;
+        }
+
+        if (isMagicSquare) {
+            System.out.println("The matrix is a magic square.");
+        } else {
+            System.out.println("The matrix is not a magic square.");
+        }
+    }
+}