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constructor syntax in c++

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Disgusted Dogfish answered on January 5, 2021 Popularity 10/10 Helpfulness 2/10

answer constructor syntax in c++

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constructor syntax in c++

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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++ constructor syntax

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Contributed on Aug 17 2021

Disgusted Dogfish

0 Answers Avg Quality 2/10

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class MyClass {     // The class
  public:           // Access specifier
    MyClass() {     // Constructor
      cout << "Hello World!";
    }
};

Popularity 10/10 Helpfulness 3/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Jan 05 2021

The Rambling Lank

0 Answers Avg Quality 2/10

classes constructor in c++

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//constructor
//carrys the same name of the class
//it is neither void nor return
//is called during the declaration of object

class Triangle {
private:
	float base;
	float height;
public:
	//constructor
	//Type 1(empty constructor,without parameters nor arguments)
	Triangle() {
		cout << "First constructor\n";
		height = base = 0;					//gives initial value to the class members
	}

	//Type 2(parameterized constructor)
	Triangle(float b, float h) {
		cout << "parameterized constructor\n";
		base = b;
		height = h;
	}
  
  	//default constructor
	Student(float b, float h = 5) {
		cout << "Default parameterized constructor\n";
		base = b;
		height = h;
    }

  //print function
  void print() {
		cout << "Base= " << getBase() << endl;
		cout << "Height= " << getHeight() << endl;
	}
};

int main() {
  // triangle will call empty Constructor
	Triangle triangle;
  	triangle.print();
  
  // triangle2 will call parameterized Constructor
	Triangle triangle2;
  	triangle2.print();
  
   // triangle3 will call default parameterized Constructor
	Triangle triangle3(2);
  	triangle3.print();


}

Popularity 10/10 Helpfulness 3/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Jun 26 2022

S.Y

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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-1

https://youtu.be/Jf8RN5c78jE

Popularity 9/10 Helpfulness 1/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Feb 18 2023

Excited Earthworm

0 Answers Avg Quality 2/10

constructor syntax in c++

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