CODEWITHSUNDEEP
javaswitch-statement
Ali Hussein
Ali Hussein

Reputation: 21

How do I make it so when the user inputs 2 values with 'and' in the middle it executes one case?

The user has to input 2 variables at once in order to get the outputted screen. Any help on the code?

            switch(cardChoice)
            {
                case 1 && 5:
                  System.out.println("You have matched the :) card! You get 10 Points!");
                  System.out.println("-------  -------  -------  -------  -------  -------");
                  System.out.println("|     |  |     |  |     |  |     |  |     |  |     |");
                  System.out.println("|  :) |  |  2  |  |  3  |  |  4  |  |  :) |  |  6  |");
                  System.out.println("|     |  |     |  |     |  |     |  |     |  |     |");
                  System.out.println("-------  -------  -------  -------  -------  -------");
                  System.out.println("-------  -------  -------  -------  -------  -------");
                  System.out.println("|     |  |     |  |     |  |     |  |     |  |     |");
                  System.out.println("|  7  |  |  8  |  |  9  |  |  10 |  |  11 |  |  12 |");
                  System.out.println("|     |  |     |  |     |  |     |  |     |  |     |");
                  System.out.println("-------  -------  -------  -------  -------  -------");
                  cardPoints = cardPoints + 10;
                break;
                default:
                  System.out.println("Invalid Input!");

            }

Upvotes: 1

Views: 41

Answers (1)

Kevin Anderson
Kevin Anderson

Reputation: 4592

If you must do it with a switch, there a couple of ways you might go about it. The trick is that case labels can only be single values, so you must somehow combine the two inputs into a single value that that can be matched by a case label.

If you only need a two-way test (e.g., user choices were either 1 and 5, or something else), reducing the inputs to a yes/no answer is sufficient. You could do something like this:

    int choice1, choice2;
    System.out.println("Enter the number of your first card choice:");
    choice1 = scanner.nextInt();
    scanner.nextLine();
    System.out.println("Enter the number of your second card choice:");
    choice2 = scanner.nextInt();
    scanner.nextLine();
    // ...
    switch (choice1 == 1 && choice2 == 5 ? "yes" : "no"){
        case "yes":
             //  RIGHT!
             break;
        default:
             System.out.println("Invlid input!");
    }

If it's going to be a true switch with multiple possible cases, you'll need to get a bit more creative. You could, for instance, create a String containing the user's choices in a predictable format that you can then match with a case. For example:

    int choice1, choice2;
    System.out.println("Enter the number of your first card choice:");
    choice1 = scanner.nextInt();
    scanner.nextLine();
    System.out.println("Enter the number of your second card choice:");
    choice2 = scanner.nextInt();
    scanner.nextLine();
    // ...
    String userChoice = String.format("%02d,%02d", choice1, choice2);
    switch (userChoice){
        case "01,05":
             //  RIGHT!
             break;
        case "02,04":
             // Another right answer!
             break;
        default:
             System.out.println("Invlid input!");
    }

Yet another way would be to combine the user's choices into a single number, in a way that preserves both values. For example, let's say we know that valid choices for either input will be less than 10. We could use:

    int choice1, choice2;
    System.out.println("Enter the number of your first card choice:");
    choice1 = scanner.nextInt();
    scanner.nextLine();
    System.out.println("Enter the number of your second card choice:");
    choice2 = scanner.nextInt();
    scanner.nextLine();
    // ...
    switch (choice1 * 10 + choice2){
        case 15:   // User chose 1 and 5
             //  RIGHT!
             break;
        case 24:   // User chose 2 and 4
             // Another right answer!
             break;
        default:
             System.out.println("Invlid input!");
    }

Upvotes: 1

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