Thread: Struct prototype

Hey guys

I never use structs really but I was messing around with them and I discovered somthing that my book doesnt teach. The below code will not compile as I havent declared a prototype for the "printNumber" function, but that made me think, what parameter do I place in the prototype to suggest I will be passing a struct to it? I havent covered passing objects to functions yet, so I thought id try with structs before I attempted classes.

And, is it safer to pass it by reference or pointer reference?

Code:

#include <iostream>

struct Number
{
   int m_Num;
};

int main()
{
    Number n;
    
    n.m_Num = 10;
    
    printNumber ( n );
    
    std::cin.get();
    
    return 0;
}

void printNumber ( Number passStruct )
{
     std::cout << "Number was: " << passStruct.m_Num;
}

Any help appriciated