anyone can help me with this code. at line 29 getting error why?
class call_by_reference_1;
int a=30;
function abc(int x,int y);
x=10;
y=20;
$display("inside class1 : x = %0d , y = %0d",x,y);
endfunction
endclass
class call_by_reference_2;
int a=40;
function abc(int x,int y);
x=10;
y=20;
$display("inside class2 : x = %0d , y = %0d",x,y);
endfunction
endclass
module call_by_ref();
int a=4,b=6;
initial begin
call_by_reference_1 obj1,obj2 ;
// call_by_value_2 obj2;
obj1 = new();
obj2 = new();
obj1.a = 50;
$display("inside module(class 1) : a = %0d",obj1.a);
$display("inside module(class 2) : a = %0d",obj2.a);
obj1 = ref obj2;
$display("inside module(class 1) : a = %0d",obj1.a);
$display("inside module(class 2) : a = %0d",obj2.a);
// $display("inside module(before call) : a = %0d , b = %0d",a,b);
// obj1.abc(a,b);
// $display("inside module(before after) : a = %0d , b = %0d",a,b);
end
endmodule