simulate a bank account
using System; public class BankAccount { public static int nNextAccountNumber = 1000; public int nAccountNumber; public double dBalance; public void InitBankAccount() { nAccountNumber = ++nNextAccountNumber; dBalance = 0.0; } public void Deposit(double dAmount) { if (dAmount > 0.0) { dBalance += dAmount; } } public double Withdraw(double dWithdrawal) { if (dBalance <= dWithdrawal) { dWithdrawal = dBalance; } dBalance -= dWithdrawal; return dWithdrawal; } }