ryan

• Sep 5th, 2011

 

To free some memory allocation, usually used with pointers.

rdurgalakshmi

 Profile Answers by rdurgalakshmi Questions by rdurgalakshmi

• Sep 15th, 2011

 

Delete operator frees the memory allocated dynamically using new operator.

mehulgala177

 Profile Answers by mehulgala177 Questions by mehulgala177

• Sep 22nd, 2011

 

Delete = free + destructor

So, If u want to free dynamically allocated memory, u can simply use free.
But if u want to call destructor as well u will have to use delete.

Lets take an example :

Code
Case 1: A String


 


char * lstrString = (char *) malloc (6 * sizeof(char));


strcpy(lstrString, "mehul");


 


In this case, I have allocated 6 Bytes on heap for lstrString. 


Now, to free this memory, I can use 


 


free(lstrString);


lstrString = NULL;


 


Case 2: A class


 


class A


{


public:


           char * lstrString;


 


           A(char * pstrString)


           {


                   lstrString = (char *) malloc (strlen((pstrString)+1)  *  sizeof(char));


                   strcpy(lstrString,  pstrString);


           }


 


          ~A()


          {


                 free(lstrString);


                 lstrString = NULL;


          }


}


 


int main()


{


        A obj("mehul");


 


        delete (obj);


}

Now, In this case, i want to call destructor of A to free the memory.
So, I will have to use delete.

prititripathi

 Profile Answers by prititripathi 

• Oct 2nd, 2011

 

delete operator is used to delete the memory occupy by variables in run time

in other word free the dynamic memory

ProgrmmingBOT

 Profile Answers by ProgrmmingBOT 

• Nov 20th, 2011

 

is there any specific use for "delete" keyword? where to use it ?

Amit

• Jan 6th, 2012

 

Delete: is used to deallocate memory from the heap that is created by new.

When you call delete, it firstly call the destructor of that object and then deallocate memory from heap.

class A
{

};

int
main()
{
A *a = new A();
delete a;

A *arr = new A[10];
delete []arr;
}