What is a copy constructor?

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Umasankar Natarajan

Software Professional Trainer with 26+ years of Experience in Software Design and Development

C++: Copy constructor is a special constructor which create a new copy of an existing object. example // Copy constructor declaration //Typical declaration ClassName ( const ClassName & ); // Mandate compiler to generate copy constructor ClassName ( const ClassName & ) = default; //Avoiding...
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C++: Copy constructor is a special constructor which create a new copy of an existing object. example // Copy constructor declaration //Typical declaration ClassName ( const ClassName & ); // Mandate compiler to generate copy constructor ClassName ( const ClassName & ) = default; //Avoiding implicit default constructor ClassName ( const ClassName & ) = delete; // Copy constructor ClassName (const ClassName &obj) { x = obj1.x; y = obj2.y; } ClassName obj1 ClassName obj2 = obj1; // call copy constructor read less
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Copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor is used to: - Initialize one object from another of the same type. - Copy an object to pass it as an argument to a function. -...
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Copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor is used to: - Initialize one object from another of the same type. - Copy an object to pass it as an argument to a function. - Copy an object to return it from a function. If a copy constructor is not defined in a class, the compiler itself defines one. If the class has pointer variables and has some dynamic memory allocations, then it is a must to have a copy constructor. read less
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IT Professional Trainer with 15 years of experience in IT Industry

A copy constructor is a special constructor in the C++ programming language for creating a new object as a copy of an existing object.
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The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor is used to: Initialize one object from another of the same type. Copy an object to pass it as an argument to a function. Copy...
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The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor is used to: Initialize one object from another of the same type. Copy an object to pass it as an argument to a function. Copy an object to return it from a function. If a copy constructor is not defined in a class, the compiler itself defines one.If the class has pointer variables and has some dynamic memory allocations, then it is a must to have a copy constructor. The most common form of copy constructor is shown here: classname (const classname &obj) { // body of constructor } Here, obj is a reference to an object that is being used to initialize another object. read less
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The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor can be used to: 1) Initialize one object from another of the same type 2) Copy an object to pass it as an argument to a function 3)...
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The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor can be used to: 1) Initialize one object from another of the same type 2) Copy an object to pass it as an argument to a function 3) Copy an object to return it from a function read less
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IT Professional Trainer working with a reputed Institute. Headquarters: Hyderabad

A copy constructor is a special constructor in the Object Oriented Programming language for creating a new object as a copy of an existing object.
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The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor is used to: 1.Initialize one object from another of the same type. 2.Copy an object to pass it as an argument to a function. 3.Copy...
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The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor is used to: 1.Initialize one object from another of the same type. 2.Copy an object to pass it as an argument to a function. 3.Copy an object to return it from a function. read less
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