What is a destructor?

A destructor is a special function member of a class that is automatically called when an object about to be deleted by delete operator. It always has the same name as the class preceded by a ‘tilt’ ~ symbol and has no return type. It is used to free allocated memory used by an object. It takes no arguments.

Example:

#include<string.h>
#include<iostream.h>
class student
{
private:
  char *name;
  
public:
  student()
  {
    name = (char *)new char[20];
    if(name)
    {
      strcpy(name, "");
    }
    else
    {
      name = NULL;
    }
  }
  char* get_name()
  {
    return name;
  }
  void set_name(char *student_name)
  {
    if(name && student_name)
    {
      strcpy(name, student_name);
    }
    return;
  }
};
int main(int argc, char* argv[])
{
  student * s_ptr;
  s_ptr = new student();
  if(s_ptr)
  {
    s_ptr->set_name("ABC");
    cout << "Student Name : " << s_ptr->get_name();
    delete s_ptr;
  }
  else
  {
    cout << "Memory allocation error";
  }
  return 0;
}

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