struct hi(){ <-- take out the () next to struct names
histructure *stuff; <-- histructure isn't a type - I think you mean to say stuff is a pointer to a hi struct? Then stuff will point to the address of histructure?
histructure *stuff; <-- histructure isn't a type - I think you mean to say stuff is a pointer to a hi struct? Then stuff will point to the address of histructure?
and then stuff->other();
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void hello::hellothere(){
hi *stuff;
stuff = &histructure;
stuff->other();
}