repl_oops/basic_constructor.cpp at master · bislara/repl_oops · GitHub

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#include <iostream>
#include <bits/stdc++.h>
using namespace std;

class Human {
  private:
    string name;
    int age;
    // wrong and gives error
    // Human()
    // {
    //     name = "noname";
    //     age = 0;
    // }
  public:
    Human()
    {
        name = "noname";
        age = 0;
    }
    void introduce()
    {
      cout<<name<<" "<<age<<endl;
    }
};

int main() {
  Human man;
  man.introduce();
  cout << "Hello World!\n";
}


// Making private constructor
#include <iostream>
using namespace std;

// class A
class A{
private:
    A(){
       cout << "constructor of A\n";
    }
    friend class B;
};

// class B, friend of class A
class B{
public:
    B(){
        A a1;
        cout << "constructor of B\n";
    }
};

// Driver program
int main(){
    B b1;
    return 0;
}