// This code illustrates when member functions should be const.
// It won’t compile, as written.

#include <iostream>

using namespace std;

class Ratio {
  public:
    Ratio(int a, int b) : top(a), bottom(b) { }

    int get_top() { return top; }		// Make this const to compile
    int get_bottom() { return bottom; }		// Make this const to compile

  private:
    int top, bottom;
};

int main() {
    const Ratio f(11,22);
    cout << f.get_top() << '\n';
    return 0;
}