c++:如何获取余额(在银行系统中)
我正在做这个项目银行系统 该系统跟踪客户在银行的账户。每个帐户都有一个号码、名称和余额。系统提供以下功能:创建新账户、提现、存款、关闭账户。
系统有如下界面:
选择:
1- 添加新帐户
2- 提款
3- 存款
4-取得平衡
5-退出
当用户选择 1 时,系统会生成一个新 ID,然后要求用户输入该帐户的名称。初始余额设置为零。
当用户选择 2 时,系统会要求用户输入帐户 ID 和要提取的金额。如果该金额大于余额,则会显示一条消息,提示余额不足,交易失败。如果余额足够,则会减少提取的金额。
当用户选择 3 时。系统要求用户输入帐户 ID 和要存入的金额。系统将余额增加此金额。
当用户选择 4 时,系统会要求用户输入帐户 ID,然后打印帐户名称和余额。
每次任务完成后,系统都会返回上面的主菜单,直到用户选择 5。
# include <iostream>
#include <string>
using namespace std;
# include<iomanip>
class Bank
{
private:
char name;
int acno;
float balance;
public:
void newAccount();
void withdraw();
void deposit();
void getbalance();
void disp_det();
};
//member functions of bank class
void Bank::newAccount()
{
cout<<"New Account";
cout<<"Enter the Name of the depositor : ";
cin>>name;
cout<<"Enter the Account Number : ";
cin>>acno;
cout<<"Enter the Amount to Deposit : ";
cin >>balance;
}
void Bank::deposit()
{
float more;
cout <<"Depositing";
cout<<"Enter the amount to deposit : ";
cin>>more;
balance+=more;
}
void Bank::withdraw()
{
float amt;
cout<<"Withdrwal";
cout<<"Enter the amount to withdraw : ";
cin>>amt;
balance-=amt;
}
void Bank::disp_det()
{
cout<<"Account Details";
cout<<"Name of the depositor : "<<name<<endl;
cout<<"Account Number : "<<acno<<endl;
cout<<"Balance : $"<<balance<<endl;
}
// main function , exectution starts here
void main(void)
{
Bank obj;
int choice =1;
while (choice != 5 )
{
cout<<"Enter \n 1- to create new account \n 2- Withdraw\n 3- Deposit \n 4- get balance\n 5 Exit"<<endl;
cin>>choice;
switch(choice)
{
case '1' :obj.newAccount();
break;
case '2' :obj.withdraw();
break;
case 3: obj.deposit();
break;
case 4: getbalance();
break;
case 5:
break;
default: cout<<"Illegal Option"<<endl;
}
}
}
i'm doing this project Banking System
This system tracks customers’ accounts in a bank. Each account has a number, name, and balance. The system provides the following functionalities: create new account, withdraw, deposit, and close account.
The system has the following interface:
Choose:
1- Add new account
2- Withdraw
3- Deposit
4- Get Balance
5- Exit
When the user chooses 1, the system generates a new ID, and then asks the user to enter a name for that account. The initial balance is set to zero.
When the user chooses 2, the system asks the user to enter account ID and amount to be withdrawn. If this amount is greater than the balance, a message is displayed that this transaction failed because insufficient balance. If balance is enough, it decreases by amount to be withdrawn.
When the user chooses 3. The system asks the user to enter account ID and amount to be deposited. System increases balance by this amount.
When the user chooses 4, the system asks the user to enter account ID then prints account’s name and balance.
Each time a task is completed the system gets back to the main menu above until the user chooses 5.
# include <iostream>
#include <string>
using namespace std;
# include<iomanip>
class Bank
{
private:
char name;
int acno;
float balance;
public:
void newAccount();
void withdraw();
void deposit();
void getbalance();
void disp_det();
};
//member functions of bank class
void Bank::newAccount()
{
cout<<"New Account";
cout<<"Enter the Name of the depositor : ";
cin>>name;
cout<<"Enter the Account Number : ";
cin>>acno;
cout<<"Enter the Amount to Deposit : ";
cin >>balance;
}
void Bank::deposit()
{
float more;
cout <<"Depositing";
cout<<"Enter the amount to deposit : ";
cin>>more;
balance+=more;
}
void Bank::withdraw()
{
float amt;
cout<<"Withdrwal";
cout<<"Enter the amount to withdraw : ";
cin>>amt;
balance-=amt;
}
void Bank::disp_det()
{
cout<<"Account Details";
cout<<"Name of the depositor : "<<name<<endl;
cout<<"Account Number : "<<acno<<endl;
cout<<"Balance : $"<<balance<<endl;
}
// main function , exectution starts here
void main(void)
{
Bank obj;
int choice =1;
while (choice != 5 )
{
cout<<"Enter \n 1- to create new account \n 2- Withdraw\n 3- Deposit \n 4- get balance\n 5 Exit"<<endl;
cin>>choice;
switch(choice)
{
case '1' :obj.newAccount();
break;
case '2' :obj.withdraw();
break;
case 3: obj.deposit();
break;
case 4: getbalance();
break;
case 5:
break;
default: cout<<"Illegal Option"<<endl;
}
}
}
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问题 1:
您在方法中犯了一个拼写错误,该方法使您获得平衡&将您要调用的银行重命名为
Bank::disp_det()
为Bank::getbalance()
问题 2:
您没有通过
Bank
的对象调用Bank::getbalance
,因为它是一个成员函数,您应该按如下方式调用它:Problem 1:
You have made a typo in method which gets you the balance & the one which you are calling, rename
Bank::disp_det()
toBank::getbalance()
Problem 2:
You are not calling
Bank::getbalance
through an object ofBank
, Since it is a member function you should call it as follows:在情况 4 中,您应该调用 obj.getbalance()。而且它还没有写:看来你已经写了一个显示余额的
disp_det()
。尝试重命名。In case 4, you should call
obj.getbalance()
. And it's not written yet: it seems you have written adisp_det()
instead that shows the balance. Try renaming.这并不完全符合您的要求,因为案例标签具有不同的类型:
要选择选项
'1'
或'2'
,用户必须输入 31当选择为int
时为 32。This isn't doing exactly what you want, as the case labels have different types:
To select options
'1'
or'2'
, the user will have to type 31 and 32 when choice is anint
.