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C++ Programming Developer

Copy Constructor C++



Initializes a new object from another, existing one
Signature:
Class::Class(Class &obj)
{
}
Date::Date(Date &date)
{
// no need to check passed date arg
  month = date.month;
  day   = date.day;
  year  = date.year;
}

//Example



#include <iostream>
using namespace std;

class a{
int x; //private
public:
int getX(){return x;}
void setX(int a){
x = a;
}

void copyConstructor(a &obj);
};

void a::copyConstructor(a &obj){
x  =  obj.x;
}

int main(){
a obj;
obj.setX(10);//Functions are called over objects.
cout << "x = " << obj.getX() << endl;
a obj1;
obj1.copyConstructor(obj);
cout << "obj1 = " << obj1.getX() << endl;
return 0;
}
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