#include <iostream>
#include <string>
class MyClass{
public:
    MyClass(){
        std::cout << "Called Constructer A n";
    }
    MyClass(int n){
        std::cout << "Called Constructer B n";
    }
};
int main(){
    MyClass a(); //It's not works as expect
    MyClass b(0); //But this works
    MyClass c;
    MyClass d = MyClass();
    MyClass e = MyClass(0);

}