Ndtyjky

Creating an Algebra Tutor trying to create random integers to solve y=m*x+b. Searched and found a lot of users have worked with this equation but not with generating a random question to require an answer and check if correct. This is what I have written so far;

import java.util.Scanner;

class AlgebraTutor {

  private static Scanner in = new Scanner(System.in);

  public static void main(String args) {



      for (int x = 0; x < 1; x++){

          System.out.println("X = " + ((int)(Math.random() * 200) -99));

      }    



      for (int m = 0; m < 1; m++){

          System.out.println("M = " + ((int)(Math.random() * 200) -99));

      }



      for (int b = 0; b < 1; b++){

          System.out.println("B = " + ((int)(Math.random() * 200) -99));

      }



  }

}    

I believe I'm on the right path with generating numbers between -100 and 100. I just don't know what to do to move forward with combining them so that I can input an answer to the numbers created. My best guess was

System.out.print("Y = " + m * x + b);

But that didn't work the way I thought it would. I want to be able to input an answer and have it check true or false. Thanks for any advice to get past this.

You need to store the values in variables for example:

int x = ((int)(Math.random() * 200) -99));

Also your for loops are unnecessary in that they only run once so you could just run the program instead of looping once.

so in the end your code should be something like this:

import java.util.Scanner;

class AlgebraTutor {

  private static Scanner in = new Scanner(System.in);

  public static void main(String args) {

      int x = ((int)(Math.random() * 200) -99);

      int m = ((int)(Math.random() * 200) -99);

      int b = ((int)(Math.random() * 200) -99);

      System.out.println("X = " + x);

      System.out.println("M = " + m);

      System.out.println("B = " + b);

      System.out.println("Y = " + m*x+b);



  }

}   

And to have it check the answer if it is true or false you would have to do something like this:

import java.util.Scanner;

class AlgebraTutor {

  private static Scanner in = new Scanner(System.in);

  public static void main(String args) {

      int x = ((int)(Math.random() * 200) -99);

      int m = ((int)(Math.random() * 200) -99);

      int b = ((int)(Math.random() * 200) -99);

      int y = m*x+b;

      System.out.println("X = " + x);

      System.out.println("M = " + m);

      System.out.println("B = " + b);

      int INPUT = in.nextInt();

      if(INPUT == y){

         System.out.println("You Got It Right!");

         System.out.println("Y = " + y);

      } else {

         System.out.println("You Got It Wrong :(");

         System.out.println("The Answer was: Y = " + y);



      }

   }

} 

The variables x,m and b in your example are in the scope of each for-loop but die after the } of the loops.

int x = (int)(Math.random() * 200) -99); // these variables will live long enough.

int m = (int)(Math.random() * 200) -99);

int b = (int)(Math.random() * 200) -99);



System.out.println("X = " + x);

System.out.println("M = " + m);

System.out.println("B = " + b);





System.out.print("Y = " + m * x + b);

This should work, but note to be careful when you try to divide these numbers like "x/b" - you will need a cast to float (google division by integer)