Question

How would you write the following program using switch statements instead of if-else statements (in java)

import java.util.*;

public class ATM

{

public static void main(String[] args)

{

Scanner input = new Scanner (System.in);

double deposit, withdrawal;

double balance = 6985.00; //The initial balance

int transaction;

System.out.println ("Welcome! Enter the number of your transaction.");

System.out.println ("Withdraw cash: 1");

System.out.println ("Make a Deposit: 2");

System.out.println ("Check your balance: 3");

System.out.println ("Exit: 4");

System.out.println ("***************");

System.out.print ("Enter Your Transaction Number ");

transaction = input.nextInt();

if (transaction == 1)

{

System.out.println ("Enter the withdrawal amount ");

withdrawal = input.nextDouble();

if (withdrawal > balance)

System.out.println ("Invalid withdrawal amount");

else

{

balance -= withdrawal;

System.out.println ("Your withdrawal is $" +

withdrawal + "Your new balance is $" + balance);

}

}

else if (transaction == 2)

{

System.out.println ("Enter the deposit amount ");

deposit =input.nextDouble();

balance +=deposit;

System.out.println ("Your deposit is $" +deposit + "Your new balance is $" + balance);

}

else if (transaction == 3)

System.out.println("Your total balance is $"+balance);

else if (transaction==4 ){

System.exit(0);

}

else

System.out.println("Wrong input");

}

}

Answer 1

import java.util.*;

public class ATM{
  
public static void main(String[] args)

{

Scanner input = new Scanner (System.in);

double deposit, withdrawal;

double balance = 6985.00; //The initial balance

int transaction;

System.out.println ("Welcome! Enter the number of your transaction.");

System.out.println ("Withdraw cash: 1");

System.out.println ("Make a Deposit: 2");

System.out.println ("Check your balance: 3");

System.out.println ("Exit: 4");

System.out.println ("***************");

System.out.print ("Enter Your Transaction Number ");

transaction = input.nextInt();
switch(transaction){
case 1:System.out.println ("Enter the withdrawal amount ");
withdrawal = input.nextDouble();
switch(withdrawal > balance ? 1:0){ // to check for greater
case 1: System.out.println ("Invalid withdrawal amount");
break;
case 0: balance -= withdrawal;
System.out.println ("Your withdrawal is $" +
withdrawal + "Your new balance is $" + balance);
break;
}
break;
case 2: System.out.println ("Enter the deposit amount ");
deposit =input.nextDouble();
balance +=deposit;
System.out.println ("Your deposit is $" +deposit + "Your new balance is $" + balance);
break;
case 3: System.out.println("Your total balance is $"+balance);
break;
case 4: System.exit(0);
break;
default: System.out.println("Wrong input");
}

}

}

/* OUTPUT */

/* PLEASE UPVOTE */