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CPP

c++ inheritance constructor

class A
{
    public: 
      explicit A(int x) {}
};

class B: public A
{
      public:

     B(int a):A(a){
          }
};

main()
{
    B *b = new B(5);
     delete b;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment

c++ constructor inheritance

#include <iostream>
 
// Base class
class Animal {
private:
  std::string gender;
  int age;
 
public:
  Animal(std::string new_gender, int new_age)
    : gender(new_gender), age(new_age) {}
};
 
// Derived class
class Dog: public Animal  {
private:
  std::string breed;
 
public:
  // Call base class constructor
  Dog(std::string new_gender, int new_age, std::string new_breed)
    : Animal(new_gender, new_age), breed(new_breed) {}
 
  void sound() {
    std::cout << "Woof
";
  }
};
 
int main() {
  // Calls Dog(string, int, string) constructor
  Dog buddy("male", 8, "Husky");
 
  // Output: Woof
  buddy.sound();
 
  return 0;
}
Comment
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