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C++ Dynamic Memory



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If you want to become an advance C++ programmer, then you must have to achieve good understanding on how to allocates memory at the program runtime. C++ memory is divided into the following two parts:

The new operators

Here is the general form to use the new operator to allocate the memory dynamically for any data-type

new data-type;

Here, data-type could be any built-in data type.

C++ Dynamic Memory Example

/* C++ Dynamic Memory - Example Program */

#include<iostream.h>
#include<conio.h>
void main()
{
   clrscr();
   int *pval=NULL;     // pointer initialized with NULL
   pval=new int;       // request memory for the variable
   *pval=10;
   cout<<"Value is "<<*pval;
   delete pval;
   getch();
}

Here is the sample run of the above C++ program:

c++ dynamic memory

Let's take one more example program:

/* C++ Dynamic Memory - Example Program */

#include<iostream.h>
#include<conio.h>
class A
{
   public:
      A()
      {
         cout<<"Constructor called\n";
      }
      ~A()
      {
         cout<<"Destructor called\n";
      }
};
void main()
{
   clrscr();
   A *aob=new A[4];
   delete []aob;
   getch();
}

Below is the sample output of the above C++ program:

dynamic memory in c++ example

For more details and more programs on dynamic memory allocation, follow C++ Dynamic Memory Allocation

C++ Online Test


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