stack4.cpp

来自「C++编程思想第二版第一册答案」· C++ 代码 · 共 26 行

//: C13:Stack4.cpp {O}
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// New version of Stack
#include "Stack4.h"

void* Stack::pop() {
  if(head == 0) return 0;
  void* result = head->data;
  Link* oldHead = head;
  head = head->next;
  delete oldHead;
  return result;
}

Stack::~Stack() {
  Link* cursor = head;
  while(head) {
    cursor = cursor->next;
    delete head;
    head = cursor;
  }
} ///:~