Basic Copy Constructor and Using it – Computer Sir Ki Class

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Code Learning #CPP#7463    siteicon   siteicon  

Basic Copy Constructor and Using it

Understanding copy constructor concept as a need to copy objects by passing reference of another object of same class.

Learning Objectives

  • Understanding copy constructor for creating new objects of same class based on another object.

Source Code

TC++ #7463

 

Source Code

Run Output

Using Constructor, x=10
Using Copy Constructor, x=10
Using Copy Constructor, x=10

Code Understanding

class C {  //Declaring the class template with name C
int x;          //A private variable in the class
public:
C(){ x=10, cout<<“Using Constructor, x=”<<x<<endl; }
A default constructor that would set x as 0 and display message and value of x.

C(const C& CC) { x=CC.x; cout<<“Using Copy Constructor, x=”<<x<<endl; }
A copy constructor that would use reference tp parameter of class object CC and would set the value of x based on value of x set by constructor. Will display message and value of x.

};

int main(){
C c1;            //Declaring c1 object which will call default constructor.
C c2=c1;     //Declaring c2 object which will call copy constructor being derived from object c1
C c3(c1);    //Alternative way of declaring object which will call copy constructor being derived from object c1
return 0;
}

Notes

  • Copy constructor is called when object copy is being made in a specific way of using the reference of another object of same class.
  • The object reference called as parameter to copy constructor is generally defined as const so that the original references of the calling object are not disturbed by the copy constructor.


Suggested Filename(s): cc.cpp,copycons.cpp



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CSKC| Created: 26-Apr-2019 | Updated: 26-Apr-2019|






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