Is it safe to return a struct in C or C++?

Question

What I understand is that this shouldn\'t be done, but I believe I\'ve seen examples that do something like this (note code is not necessarily syntactically correct but the

Answer 1

A structure type can be the type for the value returned by a function. It is safe because the compiler is going to create a copy of struct and return the copy not the local struct in the function.

typedef struct{
    int a,b;
}mystruct;

mystruct func(int c, int d){
    mystruct retval;
    cout << "func:" <<&retval<< endl;
    retval.a = c;
    retval.b = d;
    return retval;
}

int main()
{
    cout << "main:" <<&(func(1,2))<< endl;


    system("pause");
}