Question for Rock Paper Scissors game program
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Thread: Question for Rock Paper Scissors game program

  1. #1
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    Question for Rock Paper Scissors game program

    My teacher wants the user to enter in their choices with characters instead of numbers.
    R - Rock
    P - Paper
    S - Scissors.

    After the user enters R for their choice, what would I use to convert the character to a number (int)? Can i use a switch?

    Was trying to use if statements like:

    Code:
    if (guess == R)
                  {
                   userGuess = 1;
                  }
    if (guess == P)
                  {
                   userGuess = 2;
                  }
    if (guess == S)
                  {
                   userGuess = 3; 
                  }

  2. #2
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    Re: Question for Rock Paper Scissors game program

    My teacher wants the user to enter in their choices with characters instead of numbers.
    Once entered as a char, just use it as a char. For example, something like the following

    Code:
    char choice;
    cout << "Enter choice (R, P, S): ";
    cin >> choice;
    
    switch (choice) {
         case 'R':
         case 'r':
            //code for Rock
           break;
    
         case 'P':
         case 'p':
           //code for Paper
           break;
    
         case 'S':
         case 's':
           //code for Scissors
           break;
    
        default:
          //error handling for incorrect choice
    }
    Last edited by 2kaud; April 21st, 2013 at 04:39 PM. Reason: Fixed quote problem
    All advice is offered in good faith only. You are ultimately responsible for effects of your programs and the integrity of the machines they run on.

  3. #3
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    Re: Question for Rock Paper Scissors game program

    well the computer generating it's choices as 1, 2 or 3. So how do i compare

  4. #4
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    Re: Question for Rock Paper Scissors game program

    ok, i think i can compare. so ill work on that. ty

  5. #5
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    1,689

    Re: Question for Rock Paper Scissors game program

    try this

    Code:
    enum SELECTION {
        ROCK = 1,
        SCISSORS = 2,
        PAPER = 3,
        LIZARD = 4,
        SPOCK = 5
    };

  6. #6
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    Re: Question for Rock Paper Scissors game program

    Love Big Bang Theory!

    But, teacher wants user to imput letters. Im not doing very well trying to compare an int to a char.

    Any ideas? Ive tried some things that compile, but they dont run.

    EDIT. Let me also explain that the computer i do have it randomly selecting 1,2 or 3 for rock, paper, scissors. But the user input has to be R, P or S for rock paper scissors.

  7. #7
    GCDEF is offline Elite Member Power Poster
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    Re: Question for Rock Paper Scissors game program

    Quote Originally Posted by psfign View Post
    Love Big Bang Theory!

    But, teacher wants user to imput letters. Im not doing very well trying to compare an int to a char.

    Any ideas? Ive tried some things that compile, but they dont run.

    EDIT. Let me also explain that the computer i do have it randomly selecting 1,2 or 3 for rock, paper, scissors. But the user input has to be R, P or S for rock paper scissors.
    Don't compare a number to a letter. Convert a letter to a number and compare two numbers, or you could follow the example that 2kaud gave using the switch statement.

  8. #8
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    Re: Question for Rock Paper Scissors game program

    I gave you an example in post #2 how to handle user input of R, P or S. Use a similar method for the 1, 2, or 3 for the computer go. If you post your code so far as we'll be able to give better guidance.
    All advice is offered in good faith only. You are ultimately responsible for effects of your programs and the integrity of the machines they run on.

  9. #9
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    Re: Question for Rock Paper Scissors game program

    yea, i havent looked at doing that switch 2k gave yet. But a couple follow up questions. Am i correct in the thought that i could do something like:

    Code:
    num = Computer's selection
    
    if (num == 1)
    return 'R';
    or on the switch like 2k gave...can i do for the user input:

    Code:
    switch (choice) {
         case 'R':
         case 'r':
            return 1;
           break;
    either one of those would be ok?

  10. #10
    GCDEF is offline Elite Member Power Poster
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    Re: Question for Rock Paper Scissors game program

    Those could work if you use them properly.

  11. #11
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    Re: Question for Rock Paper Scissors game program

    Yea I know 2k, but i was trying other things that i thought would work....that obviously didnt work.

    and looking at your example, im assuming i can use return '1' as code for Rock

  12. #12
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    Re: Question for Rock Paper Scissors game program

    Quote Originally Posted by GCDEF View Post
    Those could work if you use them properly.
    Thanks!

  13. #13
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    Re: Question for Rock Paper Scissors game program

    Why don't you convert 1 or 2 or 3 for the computers guess to the char 'R', or 'P' or 'S' - then use the char everywhere?

    Code:
    const char conv[] = "RPSB";
    ....
    char guess = (num >= 1 && num <= 3) ? conv[num - 1] : conv[3];
    All advice is offered in good faith only. You are ultimately responsible for effects of your programs and the integrity of the machines they run on.

  14. #14
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    Re: Question for Rock Paper Scissors game program

    We havent learned how to do the conv like that, so i think I'd have to do it as

    Code:
    num = Computer's selection
    
    if (num == 1)
    return 'R';
    Thanks for your help again guys! I didnt post my code yet bc i dont want you guys thinking im trying to get you to do it for me.

    I'm wondering if I should throw in the Lizard & Spock options. Not sure how the prof would react!

  15. #15
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    Re: Question for Rock Paper Scissors game program

    i'm wondering if i should throw in the lizard & spock options. Not sure how the prof would react!
    a++
    All advice is offered in good faith only. You are ultimately responsible for effects of your programs and the integrity of the machines they run on.

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