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Thread: help me please this is a calculator by the way

  1. #1
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    Default help me please this is a calculator by the way

    What did I do wrong here? I was trying to make a calculator for my AP Comp Science class and it turned out now to work.. I followed the teachers instructions but it didn't work. Does anyone have any suggestions on how to fix this?Thanks

    import java.util.*;
     
    public class d
    {
        public static void main(String[] args)
        {
            /*Scanner input = new Scanner(System.in);
            System.out.println("What are you doing?");
            if (answer.equalsIgnorecase("multiplication"))
            {
                Multiplication();
            }*/
            System.out.println("Hello, If you are doing Multiplication Type 1.");
            System.out.println("If you are doing Addition, Type 2.");
            System.out.println("If you are doing Subtraction, Type 3");
            System.out.println("If you are doing Division, Type 4");
            Scanner input = new Scanner(System.in);
            int decision;
            decision = input.nextInt();
            if (decision == 1)
            {
                Multiplication();
            }
            if (decision == 2)
            {
                Addition();
            }
            if (decision == 3)
            {
                Subtraction();
            }
            if (decision == 4)
            {
                Division();
            }
            else {
                System.out.println("Those aren't valid numbers.");
            }
        }
     
     
        }
        public static void Multiplication()
        {
            int mInput1;
            int mInput2;
     
            Scanner input = new Scanner(System.in);
            System.out.print("What is the first number? ");
            mInput1 = input.nextInt();
     
            System.out.print("What is the second number? ");
            mInput2 = input.nextInt();
     
            System.out.println(mInput1 + " times " + mInput2 + " equals " + mInput1 * mInput2);
        }
        public static void Addition()
        {
            int aInput1;
            int aInput2;
            int aAnswer;
     
            Scanner input = new Scanner(System.in);
            System.out.println("What is the first number?");
            aInput1 = input.nextInt();
     
            System.out.println("What is the second number?");
            aInput2 = input.nextInt();
     
            aAnswer = aInput1 + aInput2;
            System.out.println(aInput1 + " plus " + aInput2 + " equals " + aAnswer);
        }
        public static void Subtraction()
        {
            int sInput1;
            int sInput2;
            int sAnswer;
     
            Scanner input = new Scanner(System.in);
            System.out.println("What is the first number?");
            sInput1 = input.nextInt();
     
            System.out.println("What is the second number?");
            sInput2 = input.nextInt();
     
            sAnswer = sInput1 - sInput2;
            System.out.println(sInput1 + " minus " + sInput2 + " equals " + sAnswer);
        }
        public static void Division()
        {
            int dInput1;
            int dInput2;
            int dAnswer;
     
            Scanner input = new Scanner(System.in);
            System.out.println("What is the first number?");
            dInput1 = input.nextInt();
     
            System.out.println("What is the second number?");
            dInput2 = input.nextInt();
     
            dAnswer = dInput2 / dInput1;
            System.out.println(dInput1 + " divided by " + dInput2 + " equals " + dAnswer);
        }
    }
    Last edited by ryry163; May 8th, 2014 at 04:58 PM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: help me please this is a calculator by the way

    What did I do wrong here
    Please explain.

    The first problem I see is the classname. d????

    Please edit your post and wrap your code with code tags:
    [code=java]
    YOUR CODE HERE
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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

    ryry163 (May 8th, 2014)

  4. #3
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    Default Re: help me please this is a calculator by the way

    Oh thank you I fixed it... First time here...

  5. #4
    Super Moderator Norm's Avatar
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    Default Re: help me please this is a calculator by the way

    it didn't work
    Please explain.

    The first problem I see is the classname. d????

    1 out of 3 is a start.
    If you don't understand my answer, don't ignore it, ask a question.

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