OVERLOADING NEW AND DELETE OPERATOR

OVERLOADING NEW AND DELETE OPERATOR

AIM:

To write a C++ program to implement the overloading of new and delete operators to provide dynamic allocation of memory

ALGORITHM:

Step 1: Start the program.

Step 2: Create a class ‘op’;

Step 3: Declare the overloaded member functions new & delete.

Step 4: Invoke the base class constructor and passing arguments for the new function.

Step 5: The inbuilt identifiers __FILE__ and __LINE__ will get the current file which under processing and the line which currently executing the __LINE__ will be passed.

Step 6: Using malloc the memory will be allocated for the current processing file.

Step 7: Invoke the overloaded operated function delete and pass the pointer variable free the memory which is already allocated.

Step 8: Stop the program.

PROGRAM:

#include<iostream.h>

#include<conio.h>

#include<stdlib.h>

class op

{

public:

            void *operator new(size_t size, char const *file,int line);

            void operator delete(void *p);

};

void *op::operator new(size_t size, char const *file,int line)

{

 void *p = malloc(size);

 cout<<"\n New called the file:"<<file<<"\n line:"<<line<<"\n size:"<<size<<"\n p:"<<p<<endl;

 return p;

 }

void op::operator delete(void *p)

{

 cout<<"\n Delete called p:"<<p<<endl;

 free(p);

 }

void main()

{

clrscr();

op *X = new(__FILE__,__LINE__)op;

delete X;

getch();

}

OUTPUT:

 New called the file:NEWDEL1.CPP

 line:24

 size:1

 p:0x8fba0df6

 Delete called p:0x8fba0df6

RESULT:

Thus the C++ program to implement the overloading of new and delete operators to provide dynamic allocation of memory was executed.