CPP Dynamic Constructor

Dynamic Constructor

  • 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:

#include <iostream.h>
#include <conio.h>
class dyncons
{
 int * p;
 public:
 dyncons()
 {
  p=new int;
  *p=10;
 }
 dyncons(int v)
 {
  p=new int;
  *p=v;
 }
 int dis()
 { return(*p);
 }
};
 
void main()
{
clrscr();
dyncons o, o1(9);
cout<<"The value of object o's p is:";
cout<<o.dis();
cout<<"\nThe value of object 01's p is:"<<o1.dis();
getch();
}

Output:

The value of object o's p is:10
The value of object 01's p is:9


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Constructor and Destructor