Constraint for two dimensional array

SystemVerilog
, , ,
16 

class matrix#(parameter size=3);
  
  rand int arr[size][size];
  //helper variable to fix daigonal element
  rand int x;
  constraint c0 {x inside {[1:100]};}
  //if diagonal element then it should be x
  constraint c1 {foreach(arr[i,j]) if(i+j==size-1)  arr[i][j]==x;}
  //if not a diagonal element 
  constraint c2 {foreach(arr[i,j]) if(i+j!=size-1) arr[i][j]==x+((i+j)-size+1);}
  
endclass

module top();
  
  matrix#(5) m1;
  
  initial begin
    m1=new();
    repeat(5) begin
    	m1.randomize();
    	foreach(m1.arr[i])
      		$display("%p",m1.arr[i]);
      $display("///////////////////");
    end
  end
  
endmodule