C++ "Class Enum" Novice Problems - c++

Question

I'm starting learning to code in C++ (coming from VB.net) and i need some help in enum class usage.
I've done this simple code from a lerning exercise (originally divided in header.h and Exercise.cpp, but i putted it all together here):
#include <iostream>
#include <string>
#define BEGIN_WITH(x) { \
auto &_ = x;
#define END_WITH() }
using namespace std;
enum class Gender { Male, Female };
struct PersonStruct {
string _Name;
string _SurName;
int _Age;
double _Heigth;
Gender _Gender; };
class Person { public:
string _Name{};
string _SurName{};
int _Age{};
double _Heigth{};
Gender _Gender{}; };
int ModifyPerson(Person& PassPersona, PersonStruct Attribute) {
PassPersona._Name = Attribute._Name;
PassPersona._SurName = Attribute._SurName;
PassPersona._Heigth = Attribute._Heigth;
PassPersona._Age = Attribute._Age;
PassPersona._Gender = Attribute._Gender;
return(0); }
int main() { Person TestingPerson;
BEGIN_WITH(TestingPerson)
_._Age = 23;
_._Gender = Gender::Male;
_._Heigth = 1.94;
_._Name = "John";
_._SurName = "Smith";
END_WITH()
cout << "Person attributes: " << endl;
cout << "Name: " << TestingPerson._Name << endl;
cout << "Surname: " << TestingPerson._SurName << endl;
cout << "Age: " << TestingPerson._Age << endl;
cout << "Gender: " << TestingPerson._Gender << endl;
cout << "Heigth: " << TestingPerson._Heigth << endl;
cout << endl;
ModifyPerson(TestingPerson, PersonStruct{ "Poca","Hontas",24,1.85,Gender::Female });
cout << "New Person attributes: " << endl;
cout << "Name: " << TestingPerson._Name << endl;
cout << "Surname: " << TestingPerson._SurName << endl;
cout << "Age: " << TestingPerson._Age << endl;
cout << "Gender: " << TestingPerson._Gender << endl;
cout << "Heigth: " << TestingPerson._Heigth << endl;
return(0); }
I've made the structure in order to group all Person class parameters. Doing this i've learned that using enum class is more secure than class. But when i switched to enum class a lot of errors prompted on my code. I've solved almost all of them, except this:
cout << "Gender: " << TestingPerson._Gender << endl;
Error code E0349 "no operator "<<" matches these operands"
I've searched around but i find no solution to this. Thanks in advance for your time! (any suggestion or recommendation on my code should be appreciated)

Answer 1

<< operator is not defined for class Gender because it's your own class. You'll need to overload it. More info here.
enum class Gender
{
male,
female
};
ostream& operator<< (ostream & os, const Gender & g)
{
switch(g)
{
case Gender::male: os << "Male"; return os;
case Gender::female: os << "Female"; return os;
}
return os;
};