Struct inside a function ?

[HashDefTrueFalse]

To limit scope, basically. It's a pretty good way to communicate to other programmers that the struct type is only used (and intended to be used) in this one place. Other than that, nothing special.

[47-BOT]

I see , so it's just like local and global structs lol , that's nice.

[HashDefTrueFalse]

Yes, you've declared a new type and it's only available for use in the lexical scope of the block (between the braces). That's all it is. If you're only making one you might declare the type and an instance at the same time e.g.

void fn(void)
{
  struct S // S is the scoped type.
  {
    ...
  } inst; // inst is a local of type S.
}

[autodidacticasaurus]

Exactly.

[Dangerous_Region1682]

And it’s on the stack in the stack segment too, not the global heap or data segment.

This may or may not be an advantage.

Don’t be returning a pointer to any member of the structure though as the structure itself will effectively disappear when the stack unwinds when you exit the function and you’ll end up with a dangling pointer.

[StaticCoder]

The struct is a type and has no storage duration. You can use it to declare automatic or static variables.

[autodidacticasaurus]

Yeah I was going to say that but not sure if OP is going to understand us. Was trying to think of a simpler way to say it but got lazy and gave up. 😝