C++ Pass a argument through a class with array index? - c++

Question

class cat
{public:
void dog(int ID, char *value) // int ID I'd like to be the index array it was called from?
{
debug(ID, value);
}
}
cat cats[18];
cats[1].dog("value second arg, first arg auto filled from index array");
I want something similar to this.
include <vector>
class CatArray;
class Cat {
// This line means that the CatArray class can
// access the private members of this class.
friend class CatArray;
private:
static int ID;
public:
void dog(const char* value) {
// Use ID here any way you want.
}
};
int Cat::ID = 0;
class CatArray {
private:
std::vector<Cat> cats;
public:
explicit CatArray(unsigned int size) : cats(size) {}
Cat& operator [](unsigned int index) {
Cat::ID = index;
return cats[index];
}
};
But a little different. There are 18 Clients in a game and i need to basically do this. for eg, "Client 4 Chooses an option and the option gets called through the array index and than that way client 4 will call the function with the function holding the index 4"

Answer 1

Then cats[1] is not really a Cat object but a CatWithIndex object:
class Cat {
public:
void dog(size_t index,const char* value);
};
class CatWithIndex {
size_t index_;
const Cat &cat_;
public:
CatWithIndex(size_t index, const Cat &cat): index_(index), cat_(cat) {}
void dog(const char* value) {
cat_.dog(index_,value);
}
};
class CatArray {
private:
std::vector<Cat> cats;
public:
Cat& operator [](unsigned int index) {
Cat::ID = index;
return CatWithIndex(index,cats[index]);
}
};