Displaying global data in C++

To avoid ambiguity, variables declared at file scope can be referenced using the global scope operator ::. For example:

int x;
class A {
   int x;
⋮
   }
}

If you are within a member function of A and want to display the value of x at file scope, enter LIST ::x. If you do not use ::, entering LIST x will display the value of x for the current object (i.e., this–>x).