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    <p>C++ is not a typical object oriented language. </p> <p>Don't believe me? look at the STL, way more templates than objects.</p> <p>It's almost impossible to use Java/C# ways of writing object oriented code; it simply doesn't work.</p> <ul> <li>In Java/C# programming, there's alot of <code>new</code>ing, lots of utility objects that implement some single cohesive functionality.</li> <li>In C++, any object <code>new</code>ed must be deleted, but there's always the problem of who owns the object</li> <li>As a result, objects tend to be created on the stack</li> <li>But when you do that, you have to copy them around all the time if you're going to pass them around to other functions/objects, thus wasting a lot of performance that is said to be achieved with the unmanaged environment of C++</li> <li>Upon realizing that, you have to think about other ways of organizing your code</li> <li>You might end up doing things the procedural way, or using metaprogramming idioms like smart pointers</li> <li>At this point, you've realized that OO in C++ cannot be used the same way as it is used in Java/C#</li> </ul> <p><a href="http://en.wikipedia.org/wiki/Q.E.D." rel="nofollow noreferrer">Q.E.D.</a></p> <p>If you insist on doing oop with pointers, you'll usually have large (gigantic!) classes, with clearly defined ownership relationships between objects to avoid memory leaks. And then even if you do that, you're already too far from the Java/C# idiom of oop. </p> <blockquote> <p><em>Actually I made up the term "object-oriented", and I can tell you I did not have C++ in mind.</em><br> -- <a href="http://video.google.com/videoplay?docid=-2950949730059754521" rel="nofollow noreferrer">Alan Kay</a> (click the link, it's a video, the quote is at 10:33)</p> </blockquote> <p><em>Although from a purist point of view (e.g. Alan Kay), even Java and C# fall short of true oop</em></p>
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    1. POWhat are the often misunderstood concepts in C++?
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    1. COWhich is more expensive - copying memory, or constantly dereferencing references? I'm not sure if I would agree that copying the objects wastes alot of performance gains... If the object is large, though, then optimize it in the class! (Many std::strings use a reference, internally, afaik).
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    2. COit doesn't matter which choice you follow, either way, you're already too far from the Java/C# idiom of oop.
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    3. COArguably-what if you added a garbage collector, and only passed around smart pointers? Either way, it doesn't matter-you're abusing RAII, which is C++'s best feature, so you're right, even if someone somehow uses C# ways in C++, you've used the worst of both worlds.
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