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passing objects as function parameters

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Join Date: Jul 2008

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sarvari

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passing objects as function parameters

Jul 20th, 2008

hhey sir i need some information about his topic urgently

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Ancient Dragon Ancient Dragon is offline

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Re: passing objects as function parameters

Jul 20th, 2008

what do you want to know about it? c++ objects are normally passed by reference to avoid expensive duplication and to let other functions use the same object as the calling function.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
class MyClass
{
  // blabla
};
 
void foo(MyClass& obj)
{
    // class passed by reference
}
 
int main()
{
    MyClass myclass; // create an instance of the class
    foo(myclass); // pass it to another function
}
class MyClass
{
  // blabla
};

void foo(MyClass& obj)
{
    // class passed by reference
}

int main()
{
    MyClass myclass; // create an instance of the class
    foo(myclass); // pass it to another function
}

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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CoolGamer48 CoolGamer48 is offline

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Re: passing objects as function parameters

Jul 20th, 2008

They can also be passed as pointers, if you want to use them. Thought I believe it's considered better to use references over pointers when possible.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
class MyClass
{
  // blabla
};
 
void foo(MyClass* obj)
{
    // class passed by reference
}
 
int main()
{
    MyClass myclass; // create an instance of the class
    foo(&myclass); // pass it to another function
 
    //or....
   MyClass* myclass = new MyClass;//create a pointer to the class and allocate an object at its location
   foo(myclass);//call the function
   delete myclass;//deallocate the object
}
class MyClass
{
  // blabla
};

void foo(MyClass* obj)
{
    // class passed by reference
}

int main()
{
    MyClass myclass; // create an instance of the class
    foo(&myclass); // pass it to another function

    //or....
   MyClass* myclass = new MyClass;//create a pointer to the class and allocate an object at its location
   foo(myclass);//call the function
   delete myclass;//deallocate the object
}