Basic Programming Questions

Started by fisheyel83l July 22, 2002 06:23 PM

5 comments, last by fisheyel83l 22 years, 5 months ago

Author

100

July 22, 2002 06:23 PM

How do I manage inheritance in C++? I''m pretty proficient at programming in Java, so I understand the concepts, but I don''t understand the syntax. It''s something like: class One { ... } Class Two::One { ... } Is that correct for making Two extend One? Also, I''ve noticed people set variables to values such as 1.0f. What''s the significance of the "f"?

Tolerance is a drug. Sycophancy is a disease.

Shannon Barber

1,684

July 22, 2002 06:30 PM

//.h
class Base_Interface
{
//virtual destructor is important for OOP
virtual ~Base_Interface(){}

//Pure abstract methods
virtual Method1()=0;
};

class Derived : Base_Interface
{
virtual Method1();
};

//.cpp
Derived::Method1()
{
//do_something();
}

Magmai Kai Holmlor

"Oh, like you''ve never written buggy code" - Lee

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Alimonster

185

July 22, 2002 06:30 PM

class One
{
};

class Two: public One
{
};

The 'f' signfies "float", which has a lower precision than double. It's a real number. Any real number is usually interpreted as a double, so if you've got functions accepting floats then you need to bung that 'f' in there, ugly as it is.

EDIT: Whoops! First class thing was in Java

[edited by - Alimonster on July 22, 2002 7:31:15 PM]

fallenang3l

144

July 22, 2002 07:53 PM

quote: Original post by fisheyel83l
How do I manage inheritance in C++? I'm pretty proficient at programming in Java, so I understand the concepts, but I don't understand the syntax.

It's something like:
class One
{
...
}

Class Two::One
{
...
}

Is that correct for making Two extend One?

Also, I've noticed people set variables to values such as 1.0f. What's the significance of the "f"?

For you Java programmers

    #define extends : public// this comment here just to preserve formatting in this source boxclass One{};class Two extends One{};

[edited by - fallenang3l on July 22, 2002 8:55:39 PM]

SnprBoB86

277

July 22, 2002 08:05 PM

lol fallenang3l... I got yelled at when I suggested to some former VB person:

      #define and &&#define or ||

:-)

-SniperBoB-

[edited by - snprbob86 on July 22, 2002 9:05:36 PM]

[edited by - snprbob86 on July 22, 2002 9:05:53 PM]

Brandon Bloomhttp://brandonbloom.name

Shannon Barber

1,684

July 22, 2002 09:33 PM

quote:
Also, I''ve noticed people set variables to values such as 1.0f. What''s the significance of the "f"?

- The trade-off between price and quality does not exist in Japan. Rather, the idea that high quality brings on cost reduction is widely accepted.-- Tajima & Matsubara