Question

Alright, so i had the bright idea of using namespaces and an if statement to change the outcome of variables, in PHP i imagine i could’ve used concatenation however c++ doesnt seem to have concatenation as far as i can see so far.

so is there a way to get this code to work?

namespace Blue
{

int seven = 7;
int eight = 8;


}

namespace Red
{

int seven = 1;
int eight = 2;

}

and here is the main cpp file

int choice;

cin >> choice;

if(choice == 1)
{
    char A[] = "Blue";

}else if(choice == 2){

    char A[] = "Red";

}

cout << A::seven << endl;

cout << A::eight << endl;

Answer 1

I don’t think there is a way to do this, and if there were, it’s probably a bad idea. You would normally accomplish this behavior in C++ using polymorphism, e.g.:

class Color {
  virtual int seven() = 0;
  virtual int eight() = 0;
};
class Blue : public Color {
  int seven() { return 7; }
  int eight() { return 8; }
};
class Red : public Color {
  int seven() { return 1; }
  int eight() { return 2; }
};

and then:

int choice;
Color* color;

cin << choice;
if (choice == 1)
  color = new Blue;
else
  color = new Red;

cout << color->seven() << endl;
cout << color->eight() << endl;

delete color;