struct S {
    int n;
    S(int); // constructor declaration
    S() : n(7) {} // constructor definition.
                  // ": n(7)" is the initializer list
                  // ": n(7) {}" is the function body
};
S::S(int x) : n{x} {} // constructor definition. ": n{x}" is the initializer list
int main()
{
    S s; // calls S::S()
    S s2(10); // calls S::S(int)
}

Popularity 10/10 Helpfulness 2/10 Language cpp

Source: en.cppreference.com

Tags: c++

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Contributed on Aug 17 2021

Disgusted Dogfish

0 Answers Avg Quality 2/10

c++ constructor

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// C++ program to demonstrate the use of default constructor

#include <iostream>
using namespace std;

// declare a class
class  Wall {
  private:
    double length;

  public:
    // default constructor to initialize variable
    Wall() {
      length = 5.5;
      cout << "Creating a wall." << endl;
      cout << "Length = " << length << endl;
    }
};

int main() {
  Wall wall1;
  return 0;
}

Popularity 10/10 Helpfulness 2/10 Language cpp

Source: www.programiz.com

Tags: c++

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Contributed on Feb 16 2022

Repulsive Raven

0 Answers Avg Quality 2/10

C++ Constructors

Comment

class  Wall {
  public:
    // create a constructor
    Wall() {
      // code
    }
};

Popularity 10/10 Helpfulness 1/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Jun 13 2022

SAMER SAEID

0 Answers Avg Quality 2/10

Constructors in C++

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