text: Magic Square | Even Order | C # program to print Magic square of Doubly even order ; Function for calculating Magic square ; filling matrix with its count value starting from 1 ; ; change value of Array elements at fix location as per rule ( n * n + 1 ) - arr [ i ] [ j ] Top Left corner of Matrix ( order ( n / 4 ) * ( n / 4 ) ) ; Top Right corner of Matrix ( order ( n / 4 ) * ( n / 4 ) ) ; Bottom Left corner of Matrix ( order ( n / 4 ) * ( n / 4 ) ) ; Bottom Right corner of Matrix ( order ( n / 4 ) * ( n / 4 ) ) ; Centre of Matrix ( order ( n / 2 ) * ( n / 2 ) ) ; Printing the magic - square ; Driver Code ; Function call
code: using System ; class GFG { public static void doublyEven ( int n ) { int [ , ] arr = new int [ n , n ] ; int i , j ; for ( i = 0 ; i < n ; i ++ ) { for ( j = 0 ; j < n ; j ++ ) { arr [ i , j ] = ( n * i ) + j + 1 ; } } for ( i = 0 ; i < n / 4 ; i ++ ) { for ( j = 0 ; j < n / 4 ; j ++ ) { arr [ i , j ] = ( n * n + 1 ) - arr [ i , j ] ; } } for ( i = 0 ; i < n / 4 ; i ++ ) { for ( j = 3 * ( n / 4 ) ; j < n ; j ++ ) { arr [ i , j ] = ( n * n + 1 ) - arr [ i , j ] ; } } for ( i = 3 * n / 4 ; i < n ; i ++ ) { for ( j = 0 ; j < n / 4 ; j ++ ) { arr [ i , j ] = ( n * n + 1 ) - arr [ i , j ] ; } } for ( i = 3 * n / 4 ; i < n ; i ++ ) { for ( j = 3 * n / 4 ; j < n ; j ++ ) { arr [ i , j ] = ( n * n + 1 ) - arr [ i , j ] ; } } for ( i = n / 4 ; i < 3 * n / 4 ; i ++ ) { for ( j = n / 4 ; j < 3 * n / 4 ; j ++ ) { arr [ i , j ] = ( n * n + 1 ) - arr [ i , j ] ; } } for ( i = 0 ; i < n ; i ++ ) { for ( j = 0 ; j < n ; j ++ ) { Console . Write ( arr [ i , j ] + " ▁ " + " ▁ " ) ; } Console . WriteLine ( ) ; } } public static void Main ( string [ ] args ) { int n = 8 ; doublyEven ( n ) ; } }