Question

I am new to C++, and let’s say I have two classes: Creature and Human:

/* creature.h */
class Creature {
private:
public:
    struct emotion {
        /* All emotions are percentages */
        char joy;
        char trust;
        char fear;
        char surprise;
        char sadness;
        char disgust;
        char anger;
        char anticipation;
        char love;
    };
};

/* human.h */
class Human : Creature {

};

And I have this in my main function in main.cpp:

Human foo;

My question is: how can I set foo’s emotions? I tried this:

foo->emotion.fear = 5;

But GCC gives me this compile error:

error: base operand of ‘->’ has non-pointer type ‘Human’

This:

foo.emotion.fear = 5;

Gives:

error: ‘struct Creature::emotion’ is inaccessible
error: within this context
error: invalid use of ‘struct Creature::emotion’

Can anyone help me? Thanks

---

P.S. No I did not forget the #includes

Answer 1

There is no variable of the type emotion. If you add a emotion emo; in your class definition you will be able to access foo.emo.fear as you want to.