Distinguished between the delete and delete [ ] : C++

[Gaauge]

Hi, I am the student of the Bsc-IT. I had learn the C++ language but I do not have the knowledge of the all of the operators. I want to free the block of memory using the operator. So, I would like to Distinguished between the delete operator and delete [] operator. I would also like to know about how can I am able to implement the delete and delete [] operator. Thus, if anyone is there who has the solution for me, reply me as early as you could.

[Modifier]

Hello, In C++ language, Whenever the object can not be required any more, delete operator can be used to free the block of memory. It could be beneficial for you to use the delete operator to release the acquired block of memory when the new operator can be used to acquired the certain block of memory for execution. It could be enough for you to learn the delete operator.

[Praetor]

According to my knowledge about the delete [] operator, delete [] operator can be used for deleting the array of memory that can be pointed by the variable of single pointer. For example : int *s=new(int b[20]). In this example, you can see that the memory can be allocated by the pointer s having the array of size 20. So, you can free this memory location that can be pointed by the pointer s, deleted by using the delete []s.

[Katty]

The following can be the example of the delete operator :

#include <iostream>
#include <new>
using namespace std;
struct mc 
{
  mc() 
{
cout <<"mc constructed\n";
}
  ~mc() 
{
cout <<"mc destroyed\n";
}
};
int main () 
{
  mc * rt;
  rt = new mc;
  delete rt;
  return 0;
}

The Output of the program as follows :

mc constructed
mc destroyed

[kelfro]

The following code of lines help you to learn the delete [] operator :

#include <iostream>
#include <new>
using namespace std;
struct mcls 
{
  mcls() 
{
cout <<"mcls constructed\n";
}
  ~mcls() 
{cout <<"mcls destroyed\n";
}
};
int main () 
{
  mcls * st;
  st = new mcls[4];
  delete[] st;
  return 0;
}

Output of the above code as follows :

mcls constructed
mcls constructed
mcls constructed
mcls destroyed
mcls destroyed
mcls destroyed