Why compiler is giving error in the second code and not in first one ?

Question

//First code
class A {
public:
int A;
};
int main() {
A o;
o.A=5;
cout<<o.A;
return 0;
}

//Second code
class A {
public:
int A;
A(){}
};
int main() {
A o;
o.A=5;
cout<<o.A;
return 0;
}

/*
Note : the variable and class has same name in the both cases but compiler is giving error only when we putting a constructor in the class A
*/

Answer 1

The constructor has the same name as the class which is A. But you can't have two members with the same name so the integer called A conflicts with the constructor called A as well. Solution: rename the integer

Answer 2

Oh so the problem is with constructor and variable ok i got it....