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Thread: Java program to generate random questions

  1. #1
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    Question Java program to generate random questions

    Little intro:
    hi i m new to java and learning it very slowly. Now i have to code for a program.

    Problem:
    firstly the program is to generate random questions like:
    7 * 8 = ?
    17 * 9 = ?

    i will explain the program. the first integer is a range between 1-20 that the user can choose any range within this like "1-5" or "12-19" any range but with in 1-20 and we must choose the first integer within the choosen range. and the second integer in the output is a random number between "1-10". and with this two variables are set and then we have to generate any five random questions.

    example: if the user selects a range like "15-19"

    then the questions may be:

    16 * 7 = ?
    15 * 2 = ?
    18 * 10 = ?
    16 * 9 = ?
    17 * 5 = ?


  2. #2
    mmm.. coffee JavaPF's Avatar
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    Default Re: A program i am conquering with

    Hello java. Welcome to the forums

    I have wrote this example for you to look at.
    There is no error handling to check what the user inputs but the functionality is there.

    import java.util.Scanner;
     
    public class JavaQuestions {
     
        /**
         * JavaProgrammingForums.com
         */
     
        // Global variables
        static String[] rangeArray = null;
        static int startRange, endRange;
     
        public void userInput(){
     
            // Scanner class to take user input
            Scanner sc = new Scanner(System.in);
            System.out.println("Enter a range between 1 and 20. eg 5-10: ");
            String firstRange = sc.nextLine();
     
            // Split the input String
            rangeArray = firstRange.split("-");
     
            // Assign range values
            startRange = Integer.parseInt(rangeArray[0]);
            endRange = Integer.parseInt(rangeArray[1]);
     
            // doMaths method
            doMaths();        
        }
     
        public void doMaths(){
     
            System.out.println("Questions:");
     
            // Loop 5 times and print
            for(int i = 0; i < 5; i++){
     
                // Generate random number between startRange and endRange
                int randomPt1 = (int)(Math.random() * (endRange - startRange + 1) ) + startRange;
     
                // Generate random number between 1 and 10
                int randomPt2 = (int)(Math.random() * (10 - 1 + 1) ) + 1;
     
                // Print math questions
                System.out.println(randomPt1 + " * " + randomPt2 + " = ?");        
            }                
        }
     
     
        public static void main(String[] args) {
     
            JavaQuestions j = new JavaQuestions();
            j.userInput();
     
        }
    }

    Example output:

    Enter a range between 1 and 20. eg 5-10:
    1-20
    Questions:
    11 * 5 = ?
    13 * 5 = ?
    8 * 5 = ?
    11 * 8 = ?
    20 * 1 = ?
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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  3. The Following User Says Thank You to JavaPF For This Useful Post:

    java (June 23rd, 2009)