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Thread: How to store a number that was inputted by the user? please help

  1. #1
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    Default How to store a number that was inputted by the user? please help

    Hey people im just wondering is there a way to store a number without using the non-void methods
    heres my code my code works grand but i need to store the balence and by how much it was topped up by if u get me drift
    class Rough1{
       public static void main(String[] args)
       {
        showServiceMenu();
       }
     
       // Declare Global Variables
       int input=0;
     
       public static void showServiceMenu()
       {
       // Local Variables
        int input=0;
        String password = "me";
        int cardnum = 123;
        double balence=0;
        double add=0;
        double purchase;
        char option;
        char stop = 'x';
     
    		// Loop to repeat the program until x is entered
        do{
        System.out.println("Login: Press 1");
        System.out.println("Customer Details: Press 2");
    		System.out.println("Customer Balence: Press 3");
    		System.out.println("Top-Up: Press 4");
    		System.out.println("Purchase: Press 5");
    		input = Keyboard.readInt();
     
       if(input==1){
       System.out.println("Please enter in your Debit Card number and password ");
       System.out.println("Debit Card Number: ");
       cardnum = Keyboard.readInt();
       System.out.println("Password: ");
    	 password = Keyboard.readString();}
     
    	 if(input==2){
    	 System.out.println("Your Details ");
    	 System.out.println("Name: Shane Lowry ");
    	 System.out.println("Address: 9 Sheepmoor Ville ");
    	 System.out.println("Card Number: 123");}
     
       if(input==3){
       System.out.println("Your balence is "+balence);}
     
       if(input==4){
       System.out.println("How much would you like to top-up");
       add = Keyboard.readDouble();
       if(add <= 100)
       System.out.println("Your new balence is "+(add+balence));
       else
       System.out.println("Your cannot add more than 100");}
     
       if(input==5){
       System.out.println("How much would you like to spend?");
       purchase = Keyboard.readDouble();
       if(purchase>balence){
       System.out.println("You don't have enough money to make a purchase");}
       else if(purchase<=balence){
       System.out.println("Thank you, you have made a purchase for "+purchase);}
       }
       System.out.println("Do you want to continue?");
    	 option = Keyboard.readChar();
       if(option=='x'){
    	 System.out.print("Goodbye");}
       }while(option!='x');
    	}
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: How to store a number that was inputted by the user? please help

    a way to store a number without using the non-void methods
    Can you explain how the return type of a method is involved?
    All executed code (excluding initialization of class variables) is done in a method.

    i need to store the balence
    balence is currently defined inside of a method. It will disappear when the method exits. If you want to save the value after the method exits, you need to move its definition to the class level.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: How to store a number that was inputted by the user? please help

    yh im sorry im new and well im stupid so i kinda understand what you are saying but not fully if u get me but i trying to store the number when i top-up so when i go to purchase it will subtraction the purchase from the new balence which is in this case (add+balence) you get me?

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: How to store a number that was inputted by the user? please help

    if u get me
    Sorry I don't understand what you are trying to do.
    i trying to store the number
    Assign it to variable.
    variable = number; // store the number in a variable

    subtraction the purchase from the new balence
    Use an assignment statement to assign the old value - purchase to the variable:
    variable = variable - amount; // subtract amount from variable
    If you don't understand my answer, don't ignore it, ask a question.

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