银行账户管理系统(一)
根据所学知识代码持续完善中……#include <iostream>#include<cmath>using namespace std;class SavingAccount{private:int id;//账户double balance;//余额double rate;...
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一个活期储蓄帐户包括账号(id),余额(balance),年利率(rate)等信息,还包括显示账户信息(show),存款(desposit),取款(withdraw),结算利息(settle)等操作。为此设计一个savingaccount类,将id,balance,rate,作为其成员数据,将show,deposit,withdraw,settle,均作为其成员函数。无论是存款取款还是结算利息,都需要修改当前的余额并且将余额的变动输出,这些公共操作由私有成员函数record来执行。
根据所学知识代码持续完善中……
#include <iostream>
#include<cmath>
using namespace std;
class SavingAccount{
private:
int id; //账户
double balance; //余额
double rate; //年利率
int lastdate; //余额上一次变化的日期
double accumulation; //余额按日累加之和
int accumulate(int date); //获得到指定日期位置的存款累计值
double getbalance(){return balance;}
double getrate(){return rate;}
void record(int date,double amount); //记账
public:
SavingAccount(int date,int id,double rate); //构造函数
void deposit(int date,double amount); //存款
void withdrawl(int date,double amount); //取款
void show(); //显示余额
void settle(int date); //结算利息,每年一月一日调用此函数
};
//类的成员函数的实现
SavingAccount::SavingAccount(int date,int id,double rate):id(id),balance(0),rate(rate),lastdate(date),accumulation(0){
cout<<"#"<<id<<"is created"<<endl;
}
int SavingAccount::accumulate(int date){
return accumulation+balance*(date-lastdate);
}
void SavingAccount::record(int date,double amount){
lastdate=date;
amount=floor(100*amount+0.5)/100; //floor为向下取整函数,此处可以做到保留两位小数
balance+=amount;
cout<<date<<"\t#"<<id<<"\t"<<amount<<"\t"<<balance<<endl;
}
void SavingAccount::deposit(int date,double amount){
record(date,amount);
}
void SavingAccount::withdrawl(int date, double amount){
if(amount>balance)
cout<<"not enough money"<<endl;
else
record(date,-amount);
}
void SavingAccount::show(){
cout<<"#"<<id<<"\tBalance"<<balance<<endl;
}
void SavingAccount::settle(int date){
double interest=accumulate(date)*rate/365; //计算年息
if(interest!=0)
record(date,interest);
accumulation=0;
}
int main()
{
SavingAccount s1(0,11111,0.015);
SavingAccount s2(1,22222,0.015);
s1.deposit(5,5000);
s2.deposit(25,10000);
s1.deposit(45,5500);
s2.withdrawl(60,11000);
s1.settle(90);
s2.settle(90);
s1.show();
s2.show();
return 0;
}
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