Answer to Question #261324 in C# for Anino

Question

Write a C# program to do help manage your credit card debt. The Main method is to repeatedly prompt the user to enter a transaction code (char) which could be ‘B’ or ‘b’ to buy an item using the credit card, ‘c’ or ‘C’ to make a cash withdrawal from the credit card, ‘p’ or ‘P’ to make a payment on the credit card, ‘D’ or ‘d’ to display the balance of the credit card, and ‘q’ or ‘Q’ to quit. the initial balance on card is $0.00.Using a switch statement in the do-while loop on Main, select the appropriate action and call (invoke) the appropriate user-defined method. The Main method should continue accepting

transactions until the user enters a ‘Q’ or ‘q’.(i) A method call ReadAmount which takes no formal parameters but returns a positive value of type double which is the cost of an item, the amount of cash withdrawn, or amount payment.ReadAmount is to be called by Main() when the user chooses to buy an item (B’ or‘b’),withdrawal cash (‘c’ or ‘C’), or make a payment (‘p’ or ‘P’).The ReadAmount should be positive

Answer 1

using System;


namespace Questions
{
    class Program
    {
        static double ReadAmount()
        {
            double amount;
            do
            {
                Console.Write("amount = ");
                amount = double.Parse(Console.ReadLine());
            } while (amount <= 0);


            return amount;
        }
        static double BuyItem(double balance)
        {
            double amount = ReadAmount();
            if (balance >= amount)
                balance -= amount;
            else
                Console.WriteLine("You don't have enough money for buying");
            return balance;
        }
        static double CashWidthdrawal(double balance)
        {
            double amount = ReadAmount();
            if (balance >= amount)
                balance -= amount;
            else
                Console.WriteLine("You don't have enough money for cash widthdrawal");
            return balance;
        }
        static double MakePayment(double balance)
        {
            double amount = ReadAmount();
            balance += amount;
            return balance;
        }
        static void DisplayBalance(double balance)
        {
            Console.WriteLine("Balance: ${0}", balance.ToString("0.00"));
        }
        static void Main()
        {
            char transactionCode;
            double initialBalance = 0;
            do
            {
                Console.WriteLine("Select a transaction\n");
                Console.WriteLine("Buy an item (B/b)");
                Console.WriteLine("Make a cash widthdrawal (C/c)");
                Console.WriteLine("Make a payment (P/p)");
                Console.WriteLine("Display the balance (D/d)");


                Console.Write("\nYour choice: ");
                transactionCode = Console.ReadLine().ToLower()[0];


                switch(transactionCode)
                {
                    case 'b':
                        initialBalance = BuyItem(initialBalance);
                        break;


                    case 'c':
                        initialBalance = CashWidthdrawal(initialBalance);
                        break;


                    case 'p':
                        initialBalance = MakePayment(initialBalance);
                        break;


                    case 'd':
                        DisplayBalance(initialBalance);
                        break;
                }
                Console.WriteLine("\n");


            } while (!transactionCode.Equals('q'));


            Console.WriteLine();
            Console.ReadKey();
        }
    }


}