c# - 提款和余额出现问题，第二次尝试时计算无法正常工作

Question

问题:如果您存入 1000-->然后借入 40000-->然后提取 43000 并收到错误“余额不足”-->然后重试并存入 28000。这里的问题是余额为 -31000第二次你尝试而不是 12000 左右的东西。有人知道为什么吗？

我尝试将大写“语句”移至 else 语句中，但这只会让事情变得更糟。我还尝试将其移至帐户统计部分，但这也不起作用。我对此很陌生，而且我不太擅长解决问题，所以很抱歉，如果这是显而易见的事情:/

using System;

namespace atmtest
{
    class Program
    {

        public static void Main()
        {

            int balance = 0, deposit = 0, withdraw = 0, choice, loan = 0, kredit = 0, debt = 0, capital = 0;

            while (true)
            {
                Console.WriteLine("----------------------------");
                Console.WriteLine("Welcome");
                Console.WriteLine("----------------------------");
                Console.WriteLine("1) Deposit");
                Console.WriteLine("2) Withdraw");
                Console.WriteLine("3) Account stats");
                Console.WriteLine("4) Borrow money");
                Console.WriteLine("--------------------------------");
                Console.WriteLine("Enter one of the options ");
                choice = int.Parse(Console.ReadLine());



                switch (choice)
                {
                    case 1:
                        Console.Clear();

                        try
                        {
                            Console.WriteLine("Deposit, enter amount : ");
                            deposit = int.Parse(Console.ReadLine());
                            if (deposit > 500000)
                            {
                                Console.WriteLine("Error, max amount 500000");
                            }
                            else if (deposit < 0)
                            {
                                Console.WriteLine("Error, the amount has to be positive");
                            }
                            else
                            {
                                capital = balance + deposit;
                                Console.WriteLine("You have deposited " + deposit + " and your balance is now: " + capital);
                            }
                        }
                        catch
                        {
                            Console.WriteLine("Error, enter numbers only.");
                        }


                        break;

                    case 2:
                        Console.Clear();
                        Console.WriteLine("Withdraw, enter amount: ");
                        withdraw = int.Parse(Console.ReadLine());

                        capital = kredit + balance - withdraw;
                        balance = balance - withdraw;

                        if ((withdraw > balance) && (withdraw > kredit))
                        {
                            Console.WriteLine("Error, insufficent balance.");
                            capital = deposit;
                            Console.WriteLine("Try again");

                        }

                        else
                        {
                            debt = balance;
                            Console.WriteLine("You have withdrawn " + withdraw);
                            Console.WriteLine("Your current balance is " + capital);
                        }
                        break;

                    case 3:
                        Console.Clear();
                        Console.WriteLine("Account stats: ");
                        Console.WriteLine("Balance: " + capital);


                        Console.WriteLine("Amount of money borrowed ( loan ): " + kredit);


                        Console.WriteLine("Debt: " + debt);
                        Console.WriteLine("You have used " + debt );
                        break;


                    case 4:
                        Console.Clear();
                        Console.WriteLine("how much do you want to borrow? Max amount is 50000.");
                        Console.WriteLine("Enter amount: ");
                        loan = int.Parse(Console.ReadLine());
                        kredit = loan + kredit;
                        if (kredit > 50000)
                        {
                            Console.WriteLine("You cannot borrow this amount, max amount is 50000");
                            kredit = kredit - loan;
                        }
                        else if (kredit <= 50000)
                        {
                            Console.WriteLine("You have been granted " + loan);
                        }
                        break;


                  


                    }


                }
            }
        }
    

}

Answer 1

尝试这个小改变来跟踪您的变量值，实际上您收到的消息是正确的。这些仅基于您的值(value)观分配。

请更改代码片段并尝试运行:

 int balance = 0, deposit = 0, withdraw = 0, choice, loan = 0, kredit = 0, debt = 0, capital = 0;

            StringBuilder audit = new StringBuilder();
            while (true)
            {
                Console.WriteLine("----------------------------");
                Console.WriteLine("Welcome");
                Console.WriteLine("----------------------------");
                Console.WriteLine("Audit");
                audit.Append($" balance = {balance}, deposit = {deposit}, withdraw = {withdraw}, loan = {loan}, kredit = {kredit}, debt = {debt}, capital = {capital} \n");
                Console.WriteLine(audit.ToString());
                Console.WriteLine("----------------------------");
                Console.WriteLine("1) Deposit");
                Console.WriteLine("2) Withdraw");
                Console.WriteLine("3) Account stats");
                Console.WriteLine("4) Borrow money");
                Console.WriteLine("--------------------------------");
                Console.WriteLine("Enter one of the options ");
                ....
                ....

这是图片

很明显，提款后余额没有减少，因此需要在逻辑上进行编程修正。