C++ examples for Class:Destructor
Linked list includes destructor
#include <iostream> using namespace std; struct link //one element of list { int data; //data item link* next; //pointer to next link }; class linklist //a list of links { private:// w w w. j a v a2 s . co m link* first; //pointer to first link public: linklist() //no-argument constructor { first = NULL; } //no first link ~linklist(); //destructor void additem(int d); //add data item (one link) void display(); //display all links }; void linklist::additem(int d) //add data item { link* newlink = new link; //make a new link newlink->data = d; //give it data newlink->next = first; //it points to next link first = newlink; //now first points to this } void linklist::display() //display all links { link* current = first; //set ptr to first link while( current != NULL ) //quit on last link { cout << endl << current->data; //print data current = current->next; //move to next link } } linklist::~linklist() //destructor { link* current = first; //set ptr to first link while( current != NULL ) //quit on last link { link* temp = current; //save ptr to this link current = current->next; //get ptr to next link delete temp; //delete this link } } int main() { linklist li; //make linked list li.additem(25); //add four items to list li.additem(36); li.additem(49); li.additem(64); li.display(); //display entire list cout << endl; return 0; }