Question

Write a complete Java program called "AtmSimDoLoop" (without the quotation marks) according to the following specifications. It should use a do-while loop to prompt the user with the following starting prompt (without the horizontal lines) until the user enters 4 to quit.

The program should start with an initial account balance, which you can set to any legitimate double value. Prompt the user with the following prompt (without the horizontal lines).

Enter the number of your desired transaction type.

Deposit

Withdrawal

Balance

Quit

If a balance is requested, the program should output “Your current balance is $X.” where X is the current balance, and repeat the prompt for the user.

If a deposit is requested, prompt the user to enter the amount of the deposit (use a double for this). Add the deposit amount to the current balance and then print “Your new balance is $X.” where X is the new balance after the deposit, and repeat the prompt for the user.

If a withdrawal is requested, prompt the user to enter the amount of the withdrawal (use a double for this). If the proposed withdrawal amount is less than or equal to the current balance, print “Your new balance is $X.” where X is the new balance after the withdrawal, and then repeat the prompt for the user. If the proposed withdrawal amount exceeds the current balance, print “Transaction cannot be completed because there are insufficient funds. Your current balance is $X.” where X is the currrent balance, and then repeat the prompt for the user.

If “Quit” is requested, the program should print “Thank you. Have a wonderful day!” and then stop.

All balances should be printed to two decimal places.

Answer 1

/*For Simplicity I used 3 different methods to do 3 different operations
* 1.public void deposit(double amount)=> to deposit balance
* 2.public void withdrawal(double amount)=> to withdrawal balance
* 3.public void getBalance()=> to print balance
* 4. constructor is used to initiliase minimum balance
* 
* If you don't want methods then you can simply write logic written inside the method body in place of method call in main
* function
*
* You can use infinite loop by defining always true inside the loop
* 
* Sample Input/Output:
* Enter the number of your desired transaction type.
 1-Deposit
 2-Withdrawal
 3-Balance 
 4-Quit 
3
Your current balance is $200.0
Enter the number of your desired transaction type.
 1-Deposit
 2-Withdrawal
 3-Balance 
 4-Quit 
1
Enter deposit balance: 
210
Your new balance is $410.0
Enter the number of your desired transaction type.
 1-Deposit
 2-Withdrawal
 3-Balance 
 4-Quit 
3
Your current balance is $410.0
Enter the number of your desired transaction type.
 1-Deposit
 2-Withdrawal
 3-Balance 
 4-Quit 
2
Enter deposit balance: 
50
Your new balance is $360.0
Enter the number of your desired transaction type.
 1-Deposit
 2-Withdrawal
 3-Balance 
 4-Quit 
4
Thank you. Have a wonderful day!
* 
* */
//----------------------------------------------------------------
//-----------------------------------------------------------------
// /Java Program to do simple transaction operations
import java.util.*;

public class AtmSimDoLoop {
    //Instance variable to store balance
    public double balance;

    //Constructor to initialize balance with default value 200 , you can set any value
    public AtmSimDoLoop()
    {
        balance=200;
    }

    public void deposit(double amount)
    {
        //Adding new balance to existing balance
        balance=balance+amount;
        //printing new balance
        System.out.println("Your new balance is $"+balance);
    }
    //Method to deposite balance
    public void withdrawal(double amount)
    {
        //Checking for positive remaining balance after withdrawal
        if(balance-amount>=0)
        {
            balance=balance-amount;
            System.out.println("Your new balance is $"+balance);
        }
        else
        {
            System.out.println("Transaction cannot be completed because there are insufficient funds. Your current balance is $"+balance);
        }
    }
    //Method to print current balance
    public void getBalance()
    {
        System.out.println("Your current balance is $"+balance);
    }

    public static void main(String[] args){
        //Instantiating Scanner to read inputs from user
        Scanner scan=new Scanner(System.in);
        //Creating objct of AtmSimdoLoop class
        AtmSimDoLoop atmObj=new AtmSimDoLoop();
        do{
            System.out.println("Enter the number of your desired transaction type.");
            System.out.println(" 1-Deposit\n 2-Withdrawal\n 3-Balance \n 4-Quit ");
            //Reading user's choice
            int choice=scan.nextInt();
            if(choice==1)
            {
                //Asking user for deposit balance
                System.out.println("Enter deposit balance: ");
                double new_balance=scan.nextDouble();
                atmObj.deposit(new_balance);
            }
            else if(choice==2)
            {
                //Asking user for withdrawal balance
                System.out.println("Enter withdrawal balance: ");

                double withdrawal=scan.nextDouble();
                atmObj.withdrawal(withdrawal);
            }
            else if(choice==3)
            {
                //printing balance using method getBalance
                atmObj.getBalance();
            }
            else if(choice==4)
            {
                //System.exit will terminate program
                System.out.println("Thank you. Have a wonderful day!");
                System.exit(0);
            }
        }while(true);
    }
}

//-----------------------------------------------------------------------------------------------------------

//------------------------------------------------------------------------------------------------------------

/ /Java Program to do simple transaction operations
import java.util.*;

public class AtmSimDoLoop {

    public static void main(String[] args){
        //creating balance variable with minimum balance $200
        double balance=200;
        //Instantiating Scanner to read inputs from user
        Scanner scan=new Scanner(System.in);
        do{
            System.out.println("Enter the number of your desired transaction type.");
            System.out.println(" 1-Deposit\n 2-Withdrawal\n 3-Balance \n 4-Quit ");
            //Reading user's choice
            int choice=scan.nextInt();
            if(choice==1)
            {
                //Asking user for deposit balance
                System.out.println("Enter deposit balance: ");
                double amount=scan.nextDouble();
                //Adding new balance to existing balance
                balance=balance+amount;
                //printing new balance
                System.out.println("Your new balance is $"+balance);
            }
            else if(choice==2)
            {
                //Asking user for withdrawal balance
                System.out.println("Enter withdrawal balance: ");
                double amount=scan.nextDouble();
                //Checking for positive remaining balance after withdrawal
                if(balance-amount>=0)
                {
                    balance=balance-amount;
                    System.out.println("Your new balance is $"+balance);
                }
                else
                {
                    System.out.println("Transaction cannot be completed because there are insufficient funds. Your current balance is $"+balance);
                }
            }
            else if(choice==3)
            {
                //Printing balance
                System.out.println("Your current balance is $"+balance);
            }
            else if(choice==4)
            {
                //System.exit will terminate program
                System.out.println("Thank you. Have a wonderful day!");
                System.exit(0);
            }
        }while(true);
    }
}