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Array of Class Objects?

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Join Date: Jul 2005

Posts: 26

Reputation: Rearden is an unknown quantity at this point

Solved Threads: 0

Rearden

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Light Poster

Array of Class Objects?

Jul 20th, 2005

Hello. I'm learning C++ out of Sams Teach Yourself C++ in 24 Hours and Accelerated C++ Practical Programming by Example. I've heard these are both good references. Anyway, I just learned about classes and I was wondering how one makes an array of class objects. here is the Cat class I made (no, not exactly the same as the one from the book, but just about :mrgreen: . . .

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class Cat
{
private:
int itsage;
std::string itsname;
public:
void setage(int age);
int getage();
void meow();
void setname(std::string name);
std::string getname();
};
 
//setage sets the cat's age
void Cat::setage(int age)
{
itsage = age;
}
 
//returns the cat's age
int Cat::getage()
{
return itsage;
}
 
 
//meow has the cat meow
void Cat::meow()
{
std::cout << "Meow\n";
}
 
//setname sets the cat's name
void Cat::setname(std::string name)
{
itsname = name;
}
 
//getname returns the cat's name
std::string Cat::getname()
{
return itsname;
}
class Cat
{
private:
int itsage;
std::string itsname;
public:
void setage(int age);
int getage();
void meow();
void setname(std::string name);
std::string getname();
};

//setage sets the cat's age
void Cat::setage(int age)
{
itsage = age;
}

//returns the cat's age
int Cat::getage()
{
return itsage;
}


//meow has the cat meow
void Cat::meow()
{
std::cout << "Meow\n";
}

//setname sets the cat's name
void Cat::setname(std::string name)
{
itsname = name;
}

//getname returns the cat's name
std::string Cat::getname()
{
return itsname;
}

I think that I have the right method for initializing the array. I am doing Cat pack [8];

however. I think I'm doing it wrong when trying to call a Cat member function to a Cat object in the array. I tried pack.at(0).setage(4); which turned up a lot of errors.

Is this something that can only be accomplished using pointers? I haven't learned enough about pointers yet to do that. If it requires a pointer, I understand and will wait until I learn more, i'd just like to know. Thanks in advance.

-Matt

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Join Date: Apr 2005

Posts: 105

Reputation: jhdobbins is an unknown quantity at this point

Solved Threads: 3

jhdobbins

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Junior Poster

Re: Array of Class Objects?

Jul 20th, 2005

try this.... pack[0].setage(4);

arrays start out at 0 and go up... if you declared pack[8] the elements go from 0-7. and when you use arrays you have to include the [?] where you use it at with ? being the position you want to use.