Error C2166: l-value specifies const object

Code:

---

65 int BasicMonster::calculatePower() const
 
66 {
67 if (weight > stamina)
68 power -= (weight - stamina) * 2;
69
70 if (health <= 0)
71 power = 0;
72 else if (health > 100)
73 power += (health - 100) * 3;
74 else if (health < 10)
75 power *= health / 10.0;
76
77 return power;
78 }

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Error 1 error C2166: l-value specifies const object 68
Error 2 error C2166: l-value specifies const object 71
Error 3 error C2166: l-value specifies const object 73
Error 5 error C2166: l-value specifies const object 75


Please, could you tell me what I have to write to not have errors?

"const" means "constant" which means "does not change". So since you have this function marked as const (on line 65), that means you cannot change any members of the class. (In other words, if this is supposed to change some member of the class, then it cannot be a const function.)

Thank you!!!:)

if you need to change those members from inside const functions, you can mark them as mutable.

That is dangerous. You should really think it through if it makes sense to do that. For most things, it simply doesn't make sense. The only exception I can think of is thread safety.

Elysia, I agree, but I was throwing it out there as another option that the language allows. I have never had a need to use mutable in any of my code, but I can see how it might be useful in applications like reference counting.

Not disagreeing with your reply. Just putting in a note of caution that I felt was missing.