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I dont need a program....i just need to know the difference

 
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I dont need a program....i just need to know the difference, Classes,Structures, union
manurulzforever
13 Dec, 2007 - 10:26 PM
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Can anyone please help me understand what exactly are classes, unions and structures......
if not possible please provide suitable links to websites.
If possible could you please provide suitable examples to show how they are used.
I would be really grateful if you could
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Bench
RE: I Dont Need A Program....i Just Need To Know The Difference
14 Dec, 2007 - 04:33 AM
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Your C++ Book ought to explain these things in depth. If you haven't got a C++ book, have a look at Bruce Eckel's free e-book, Thinking in C++ Vol 1.
http://mindview.net/Books/TICPP/ThinkingInCPP2e.html


in the meantime, the first half of this page explains the struct keyword
http://www.cplusplus.com/doc/tutorial/structures.html
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Bench
RE: I Dont Need A Program....i Just Need To Know The Difference
14 Dec, 2007 - 04:41 AM
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ad. - the syntax and usage of class and struct are identical for all intents and purposes.

As you explore object-oriented programming, the terms 'public' and 'private' will creep in (Although, don't worry about them for now). Just for future reference, the only difference between a struct and a class in C++, is that a class defaults everything to private, wheras a struct defaults everything to public.
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mattman059
RE: I Dont Need A Program....i Just Need To Know The Difference
14 Dec, 2007 - 07:03 AM
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structs are usefull for programs in which you need a small set of similar data (say a student program, where you only need a name, gpa, and ID#) You COULD use a class to define it, but a struct would be simpler. A Class is used for larger programs where you would want to have data, and functions that work together.

Another type that you could look into are Enums (or enumerated data) they are usefull in creating dictionaries and things like that
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