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Thread: How to make a program run multiple times.

  1. #1
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    Question How to make a program run multiple times.

    I have made a basic math game that asks you questions and tells you if you have answered them correctly or incorrectly. The game runs great! The thing is that it asks you a question one time and after you answer you have to run the program again. I want to get the program to ask ten questions. After that I want to figure out a scoring system for it but the first step is to get it to ask my ten questions. Here is my code.

    package pkgnew;

    import java.util.Scanner;
    import java.util.Random;

    public class New {

    public static void main(String args[]) {

    //Declare and construct variables
    Random randomnum = new Random();
    int fnum, snum, answer;
    int mathnumber = randomnum.nextInt(20);
    int newnumber = randomnum.nextInt(20);

    //Declare and construct variables of math problem
    fnum = mathnumber;
    snum = newnumber;
    answer = fnum + snum;

    //Output of math problem
    System.out.print(fnum);
    System.out.print("+");
    System.out.println(snum);

    Scanner serena = new Scanner(System.in);
    int userAnswer = serena.nextInt();

    //If user input = answer display "correct"
    if (userAnswer == answer) {
    System.out.println("Correct!");

    //If user input does not = answer display "wrong" and correct answer
    } else {
    System.out.print("Wrong!");
    }

    }
    }


  2. #2
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    Default Re: How to make a program run multiple times.

    Please wrap your code with [code] tags so that it is easier to read, e.g.,
    [code=java]
    // your code here
    [/code]

    It preserves formatting and provides syntax highlighting, e.g.,
    // your code here

    Study the for statement at The for Statement (The Java™ Tutorials > Learning the Java Language > Language Basics). It'll allow you to loop through your code how ever many times you want. After that, you can declare a variable outside the loop, and update the value of the variable with the score inside the loop.

  3. The Following User Says Thank You to jashburn For This Useful Post:

    kunimaro15689 (May 18th, 2014)

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    Default Re: How to make a program run multiple times.

    Thanks. I fixed my code in a new thread where I was more specific. Using this method I would have to use everything as an integer for the loop to work? I cant make the entire question an integer so I am confused when it comes to how to do it.

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    Default Re: How to make a program run multiple times.

    Please don't post multiple threads on the same topic. If you decide you need to be more clear, post the clarification in your original thread rather than starting a new one.

    Clarify your latest question. No idea what you're asking.

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    Default Re: How to make a program run multiple times.

    When you want your code to run a certain amount of times, you use the For loop. Here's an example,
    for(int i = 0; i < 10; i++)
    {
        //code in here
    }
    You can also ask the user how many times they want to run it.. Example:
    System.out.println("How many times would you like to run this program?");
    int x = scan.nextInt();
    for(int i = 0; i < x; i++)
    {
         //code here
    }
    When you don't know how many times the user wants to run your code you can use a while loop.. Example:
    String answer = "y";
    while(answer.equalsIgnoreCase("y")) //this just means as long as the variable "answer" equals "y" it will continue to loop
    {
        //other code
        System.out.println("\nDo you want to run this application again?(y or n)");
                answer = scan.nextLine();
                answer = answer.substring(0,1);
    }
    Hope this helps!
    Horray for first post!

  7. The Following User Says Thank You to xPhish For This Useful Post:

    kunimaro15689 (May 23rd, 2014)

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    Default Re: How to make a program run multiple times.

    Thanks for your help xPhish! It helped a lot!

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