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POManaging without Objects in C - And, why can I declare variables anywhere in a function in C?
 

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  1. POManaging without Objects in C - And, why can I declare variables anywhere in a function in C?
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    <p>everyone. I actually have two questions, somewhat related.</p> <p>Question #1: Why is gcc letting me declare variables after action statements? I thought the C89 standard did not allow this. (GCC Version: 4.4.3) It even happens when I explicitly use <code>--std=c89</code> on the compile line. I know that most compilers implement things that are non-standard, i.e. C compilers allowing <code>//</code> comments, when the standard does not specify that. I'd like to learn just the standard, so that if I ever need to use <em>just</em> the standard, I don't snag on things like this.</p> <p>Question #2: How do you cope without objects in C? I program as a hobby, and I have not yet used a language that does not have Objects (a.k.a. OO concepts?) -- I already know some C++, and I'd like to learn how to use C on it's own. Supposedly, one way is to make a POD struct and make functions similar to <code>StructName_constructor()</code>, <code>StructName_doSomething()</code>, etc. and pass the struct instance to each function - is this the 'proper' way, or am I totally off?</p> <p>EDIT: Due to some minor confusion, I am defining what my second question is more clearly: I am not asking <code>How do I use Objects in C?</code> I am asking <code>How do you manage without objects in C?</code>, a.k.a. how do you accomplish things without objects, where you'd normally use objects?</p> <p>In advance, thanks a lot. I've never used a language without OOP! :) </p> <p>EDIT: As per request, here is an example of the variable declaration issue:</p> <pre><code>/* includes, or whatever */ int main(int argc, char *argv[]) { int myInt = 5; printf("myInt is %d\n", myInt); int test = 4; /* This does not result in a compile error */ printf("Test is %d\n", test); return 0; } </code></pre>
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    1. CO1. Can you provide an example the declaration issue? 2. C can easily be used for object-oriented programming. Just use structs.
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    2. CO@Rafe - I don't agree. You cannot have member functions in C structs (instead, some function pointers are used to emulate polymorphism and things like this).
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    3. CO@Kiril yes you can, using function pointers. But even then, how's that different from passing the struct around to functions?
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