assignment3

// write a program that simulates action within a bank account

import java.util.Scanner;
public class bankAccount1
{
  static Scanner kb = new Scanner(System.in); // applies to whole main when before main
  public static void main(String[ ] args)
  {
   
    char option;
    double initialBal, balance;
    
    System.out.println("Enter the initial balance ");
    initialBal = kb.nextDouble();
    
    balance = initialBal;
    menu(); 
    do
    {
      System.out.println("What is the option? ");
      option = kb.next().charAt(0);
      
      switch (option) // if the switch option was an integer it would be numbers not 'letter'
      {
        case 'D': balance = Deposit(balance); // this line is calling the method deposit, sending balance to it 
        break; // send the balance to method deposit then send balance back to new balance and print new balance
        
        case 'W': balance = Withdraw(balance); // these methods must be returning methods!!
        break; // need to return the balance because these fuctions (D/W) are related!!
        
        // "when methods are related, we must return the value back"
        
        case 'P': Print(initialBal, balance);
        break;
        
        case 'Q': System.out.println("Quit ");
        break;
      } // end switch
       
    } // end loop
    
    while(option != 'Q');
  
  } // end main
  
  public static void menu()
  {
    System.out.println("\t D: Deposit ");
    System.out.println("\t W: Withdraw ");
    System.out.println("\t P: Print "); // dont use print as separate method
    System.out.println("\t Q: Quit ");
  }
  
  public static double Deposit(double balance) // Deposit is name of method 
  {
    double dep, totalDep = 0; // local variables
    
    System.out.println("Enter deposit ");
    dep = kb.nextDouble();
    balance = balance + dep;
    totalDep = totalDep + dep;
    System.out.println("Total Deposit = " + totalDep);
    return balance;
  }
  
  public static double Withdraw(double balance) // Withdraw is name of method
  {
    double check, totalCheck = 0;
    
    System.out.println("Enter check ");
    check = kb.nextDouble();
    balance = balance - check;
    totalCheck = totalCheck + check;
    System.out.println("Total check = " + totalCheck);
    return balance;
  }
  
  public static void Print(double initialBal, 
                           double balance)
  {
    System.out.println("The initial balance was = " 
                         + initialBal);
    System.out.println("The current balance is = " 
                         + balance);
  }
  
} // end class