saving.cpp

一、教学目的： 能理解C++中运算符重载的需要性

#include<iostream.h>
#include"saving.h"

Savings* Savings::pFirst=0;//链表为空
int Savings::count=0;      //帐户个数为0

Savings::Savings(unsigned accNo,float balan)
{
	acntNumber=accNo;
	balance=balan;

	count++;
	if(pFirst==0)
		pFirst=this;//空链表中插入一个
	else
	{
		Savings* pS=pFirst;
		for(;pS->pNext;pS=pS->pNext);
		(pS->pNext)=this;//插入本结点
	}
	pNext=0;//本结点为最后一个结点
}
unsigned Savings::AccountNo()
{
	return acntNumber;
}
float Savings::AcntBalan()
{
	return balance;
}
Savings* Savings::First()
{
	return pFirst;
}
Savings* Savings::Next()
{
	return pNext;
}
int Savings::NoAccounts()
{
	return count;
}
void Savings::Display()
{
	cout<<"Savings account number:"<<acntNumber<<"="<<balance<<endl;
}
void Savings::Deposit(float amount)
{
	balance+=amount;
}
void Savings::Withdrawal(float amount)
{
	if(balance<amount)
		cout<<"Insufficient funds:balance"<<balance<<",Withdrawal"<<amount<<endl;
	else
		balance-=amount;
}