accountlist.cpp

来自「it is a usefull thing」· C++ 代码 · 共 45 行

//=====================================
// accountlist.cpp
//=====================================
#include<iostream>
using std::cout;
#include"accountlist.h"
//-------------------------------------
void AccountList::add(Account& a){
  Node* pN = new Node(a);
  if(first){
    pN->next = first;
    first->prev = pN;
  }
  first = pN;  size++;
}//------------------------------------
void AccountList::remove(string acntNo){
  Account a(acntNo);
  for(Node* p=first; p; p=p->next)
    if(*p==Node(a)){
      if(p->prev) p->prev->next = p->next;
      if(p->next) p->next->prev = p->prev;
      if(p==first) first = p->next;
      delete p;
      size--;
      break;
    }
}//------------------------------------
Account* AccountList::find(string acntNo)const{
  Account a(acntNo);
  for(Node* p=first; p; p=p->next)
    if(*p==Node(a))
      return &(p->acnt);
  return 0;
}//------------------------------------
void AccountList::display()const{
  std::cout<<"There are "<<size<<" accounts.\n";
  for(Node* p=first; p; p=p->next)
    (p->acnt).display();
}//------------------------------------
AccountList::~AccountList(){
  for(Node* p=first; p=first; delete p)
    first = first->next;
}//------------------------------------