C++银行账户管理系统代码 |21xrx.com

C++银行账户管理系统代码

2023-07-10 05:55:54 深夜i -- --

C++ 银行账户管理系统代码数据库

C++银行账户管理系统是一个功能丰富的应用程序，可以帮助用户管理其银行账户。本文将介绍该程序的代码以及其主要特点。

主要特点：

- 可以添加，删除，更新和查看账户信息

- 支持多个账户

- 采用文件存储数据，在程序关闭时保存数据

该程序的主要代码如下：


#include<iostream>
#include<fstream>
#include<cstring>
#include<iomanip>
using namespace std;
class Account
{
private:
  int accountNumber;
  char firstName[10];
  char lastName[10];
  float balance;
public:
  void createAccount();
  void showAccount();
  void modify();
  void deposit(float);
  void withdraw(float);
  void report();
  int getAccountNumber();
  float getBalance();
};
void Account::createAccount()
{
  cout<<"\nEnter the account number: ";
  cin>>accountNumber;
  cout<<"\nEnter the first name: ";
  cin>>firstName;
  cout<<"\nEnter the last name: ";
  cin>>lastName;
  cout<<"\nEnter the balance: ";
  cin>>balance;
  cout<<"\nAccount created...\n";
}
void Account::showAccount()
{
  cout<<"\nAccount Number: "<<accountNumber;
  cout<<"\nFirst Name: "<<firstName;
  cout<<"\nLast Name: "<<lastName;
  cout<<"\nBalance: "<<balance;
}
void Account::modify()
{
  cout<<"\nAccount Number: "<<accountNumber;
  cout<<"\nModify First Name: ";
  cin>>firstName;
  cout<<"\nModify Last Name: ";
  cin>>lastName;
  cout<<"\nModify Balance: ";
  cin>>balance;
  cout<<"\nAccount updated...";
}
void Account::deposit(float amount)
{
  balance+=amount;
}
void Account::withdraw(float amount)
{
  if(balance<amount)
    cout<<"\nInsufficient balance...";
  else
    balance-=amount;
}
void Account::report()
{
  cout<<accountNumber<<setw(10)<<" "<<firstName<<setw(10)<<" "<<lastName<<setw(10)<<balance<<endl;
}
int Account::getAccountNumber()
  return accountNumber;
float Account::getBalance()
  return balance;
void writeAccount();
void displayAll();
void displaySp(int);
void modifyAccount(int);
void deleteAccount(int);
void depositWithdraw(int, int);
int main()
{
  char welcome;
  cout<<"\n\n\n\t\t\t\t===========================================================";
  cout<<"\n\t\t\t\t\t Welcome to the Bank Account Management System";
  cout<<"\n\t\t\t\t===========================================================";
  cout<<"\n\n\n\t\t\t\tEnter any key to continue";
  cin>>welcome;
  int choice;
  int accountNumber;
  do
  {
    cout<<"\n\n\n\t\t\t\t===========================================================";
    cout<<"\n\t\t\t\t\tMain Menu";
    cout<<"\n\t\t\t\t===========================================================";
    cout<<"\n\n\t\t\t\t1. New Account";
    cout<<"\n\t\t\t\t2. Deposit Amount";
    cout<<"\n\t\t\t\t3. Withdraw Amount";
    cout<<"\n\t\t\t\t4. Balance Enquiry";
    cout<<"\n\t\t\t\t5. Show All Accounts";
    cout<<"\n\t\t\t\t6. Close An Account";
    cout<<"\n\t\t\t\t7. Modify An Account";
    cout<<"\n\t\t\t\t8. Exit";
    cout<<"\n\n\t\t\t\tEnter your choice: ";
    cin>>choice;
    switch(choice)
    {
    case 1:
      writeAccount();
      break;
    case 2:
      cout<<"\n\n\tEnter the account number: ";
      cin>>accountNumber;
      depositWithdraw(accountNumber, 1);
      break;
    case 3:
      cout<<"\n\n\tEnter the account number: ";
      cin>>accountNumber;
      depositWithdraw(accountNumber, 2);
      break;
    case 4:
      cout<<"\n\n\tEnter the account number: ";
      cin>>accountNumber;
      displaySp(accountNumber);
      break;
    case 5:
      displayAll();
      break;
    case 6:
      cout<<"\n\n\tEnter the account number: ";
      cin>>accountNumber;
      deleteAccount(accountNumber);
      break;
    case 7:
      cout<<"\n\n\tEnter the account number: ";
      cin>>accountNumber;
      modifyAccount(accountNumber);
      break;
    case 8:
      cout<<"\n\n\tThanks for using bank management system!!";
      break;
    default:cout<<"\n\n\tInvalid choice!!";
    }
    cin.ignore();
    cin.get();
  }while(choice!=8);
  return 0;
}
void writeAccount()
{
  Account ac;
  ofstream outFile;
  outFile.open("account.txt",ios::binary|ios::app);
  ac.createAccount();
  outFile.write(reinterpret_cast<char *> (&ac), sizeof(Account));
  outFile.close();
}
void displayAll()
{
  Account ac;
  ifstream inFile;
  inFile.open("account.txt",ios::binary);
  if(!inFile)
  
    cout<<"File could not be open !! Press any Key...";
    return;
  
  cout<<"\n\n\t\tDISPLAYING ALL ACCOUNTS\n\n";
  cout<<"====================================================\n";
  cout<<"A/c no.   NAME      Type  Balance\n";
  cout<<"====================================================\n";
  while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(Account)))
  {
    ac.report();
  }
  inFile.close();
}
void displaySp(int n)
{
  Account ac;
  bool flag=false;
  ifstream inFile;
  inFile.open("account.txt",ios::binary);
  if(!inFile)
  
    cout<<"File could not be open !! Press any Key...";
    return;
  
  cout<<"\nBALANCE DETAILS\n";
  while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(Account)))
  {
    if(ac.getAccountNumber()==n)
    {
      ac.showAccount();
      flag=true;
    }
  }
  inFile.close();
  if(flag==false)
    cout<<"\n\nAccount number does not exist";
}
void modifyAccount(int n)
{
  bool found=false;
  Account ac;
  ifstream inFile;
  ofstream outFile;
  inFile.open("account.txt",ios::binary);
  if(!inFile)
  
    cout<<"File could not be open !! Press any Key...";
    return;
  
  outFile.open("Temp.txt",ios::binary);
  while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(Account)))
  {
    if(ac.getAccountNumber()==n)
    {
      ac.modify();
      found=true;
    }
    outFile.write(reinterpret_cast<char *> (&ac), sizeof(Account));
  }
  inFile.close();
  outFile.close();
  if(found==false)
    cout<<"\n\nAccount number does not exist";
  else
  {
    remove("account.txt");
    rename("Temp.txt","account.txt");
    cout<<"\n\n\tRecord Updated!";
  }
}
void deleteAccount(int n)
{
  Account ac;
  ifstream inFile;
  ofstream outFile;
  inFile.open("account.txt",ios::binary);
  if(!inFile)
  
    cout<<"File could not be open !! Press any Key...";
    return;
  
  outFile.open("Temp.txt",ios::binary);
  while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(Account)))
  {
    if(ac.getAccountNumber()!=n)
    {
      outFile.write(reinterpret_cast<char *> (&ac), sizeof(Account));
    }
  }
  inFile.close();
  outFile.close();
  remove("account.txt");
  rename("Temp.txt","account.txt");
  cout<<"\n\n\tRecord Deleted..";
}
void depositWithdraw(int n, int option)
{
  float amount;
  bool found=false;
  Account ac;
  fstream File;
  File.open("account.txt", ios::binary|ios::in|ios::out);
  if(!File)
  
    cout<<"File could not be open !! Press any Key...";
    return;
  
  while(File.read(reinterpret_cast<char *> (&ac), sizeof(Account)) && found==false)
  {
    if(ac.getAccountNumber()==n)
    {
      ac.showAccount();
      if(option==1)
      {
        cout<<"\n\n\tTO DEPOSIT AMOUNT ";
        cout<<"\n\nEnter the amount to be deposited: ";
        cin>>amount;
        ac.deposit(amount);
      }
      if(option==2)
      {
        cout<<"\n\n\tTO WITHDRAW AMOUNT ";
        cout<<"\n\nEnter the amount to be withdrawn: ";
        cin>>amount;
        float bal=ac.getBalance()-amount;
        if((bal<500 && ac.getAccountNumber()<285) || (bal<1000 && ac.getAccountNumber()>284))
          cout<<"Insufficient balance";
        else
          ac.withdraw(amount);
      }
      int pos=(-1)*static_cast<int>(sizeof(Account));
      File.seekp(pos,ios::cur);
      File.write(reinterpret_cast<char *> (&ac), sizeof(Account));
      cout<<"\n\n\tRecord Updated!";
      found=true;
    }
  }
  File.close();
  if(found==false)
    cout<<"\n\nRecord Not Found!!";
}

该程序包含一个类 Account，其中定义了所有银行账户的属性和方法。方法包括 createAccount()，showAccount()，modify()，deposit()，withdraw()，report()，getAccountNumber()和getBalance()。main()函数根据用户的选择调用相应的方法。

该程序采用文件来存储数据并在程序关闭时自动保存。在每次修改数据时，程序会读取整个文件，将修改后的数据写回文件。该程序的优点是可以很方便地管理多个账户，同时保护用户的隐私和数据安全。

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