Dynamic Constructor In C++

Dynamic constructor is used to allocate the memory to the objects at the run time. Memory is allocated at run time with the help of 'new' operator.

By using this constructor, we can dynamically initialize the objects.

Example:

Class A

{

public:

int *pt;

A()                //Default dynamic constructor

{

pt=new int;

*pt=50;

}

A(int x)        //Parameterized dynamic constructor

{

pt=new int

*pt=x;

}

int show ()

{

return(*pt);

}

};

void main()

{

clrscr();

A obj1;

A obj2(40);

cout<<”The value of 1^st object is:”<<”\n”;

obj1.show();

cout<<”The value of 2nd object is:”<<”\n”;

obj2.show();

}

Output:

The value of 1^st object is:50
The value of 2nd object is:40