Passing variables through functions and structures?

Okay I had asked this question basically in an earlier thread but i do not think i was straght to the point. Anyways my second go at it.

QUESTION:
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Is it possible to have a structure call a variable from it in a function edit it than call that variable into the main from the structure updated from the function?

And if you can point me to a tutorial , lesson or quick example.

Thank in advance.

how can you call a variable? don't you mean make reference to a variable or along them lines? There are many ways that you can update variables in a structure going through a function. If the structure you are passing is very large, i would personally pass it through a pointer, thereby reducing the amount of data being put on the stack. However, if it's small you can pass it by reference.

void whatevername(MyStrctureType *Structure);
void whatevername(MyStrctureType &Structure);

if your passing a single structure through a pointer user -> to access the members. An array you would use[]. By reference would be normal...

Struct1.Num = 7; etc.

thanx that helped!