trying to do simple math with float and int type

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Originally Posted by citizen

There is no reason to "beware of pointers;" they are not treated differently than any other variable if we are discussing implications of local scope. Copies of pointers are generated if they are arguments to functions, too.

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I was thinking of that pointers can actually store addresses of variables, and pointers can generally hold a heap allocation, thus breaking the whole local chain.
Even if you pass a pointer to some stuff, none is to say that this pointer is used elsewhere, too.
Pointers are flexible and powerful and therefore comes at a price.

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Absolutely C knows the types of variables passed to functions because that information is available from the parameter list. The only contexts in which it isn't available include variadic functions (such as printf) and macro functions. Just wanted to clear that up, since this piece of advice is more about printf than it is about C or variables in general.

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Oh yes, good point.

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Originally Posted by Elysia

I was thinking of that pointers can actually store addresses of variables, and pointers can generally hold a heap allocation, thus breaking the whole local chain.
Even if you pass a pointer to some stuff, none is to say that this pointer is used elsewhere, too.
Pointers are flexible and powerful and therefore comes at a price.

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The memory a pointer points to may be from the heap but that is practically irrelevant since the pointer itself can have a different, more defined scope. If it were not so, then you could not incur a memory leak because some pointer fell out of scope.