So a few weeks ago I found out about the Stanford CS106a classes that you could find on youtube, and since then I have been occasionally working on Karel programs when I get the chance. For the past few days though Ive been working on programming actual java. I've done a few things so far, mainly just math related code to get me used to programming Console Programs. For the past 2 days when I've gotten the chance I've been working on just simply writing the quadratic formula, which took roughly 3-4 hours to write, and another hour and a half to debugmainlyone bug that caused the math to not function properly.

So last night I got everything fixed, and this morning I thought before I celebrate I had better make it so that the program repeats so I don't have to close it and run it every time I run a problem. So, like I did in Karel programs, I used the standard "private void repeat() {" (without quotation marks). Which ended up getting some errors and causing some other errors. So after about an hour and a half now messing with the code, googling, and trying to figure out what the error messages mean, I havent gotten to far. At the moment I have "private @ repeat() {" (once again without quotes) and the only error message given is "Syntax error, insert 'enum Identifier' to complete enumHeader". All im aiming to do is create a method to call on if the user presses "y" and wants to run the program again. Heres the code:

Code :

/* This program should allow the user to input variables, and solve the quadratic formula. * * Code that causes program to repeat may not be debugged fully. * Currently working on code to make the program repeat itself. * Could look neater in the future. */ import acm.program.ConsoleProgram; public class quadraticFormula extends ConsoleProgram { public void run() { private @ repeat() { println("Enter values a, b, and c to compute Quadratic Formula"); int a = readInt("Enter a: "); // Getting some input for the formula // int b = readInt("Enter b: "); int c = readInt("Enter c: "); int discriminant = ((b*b) - (4*a*c)); { // Solves the inside of the radical without finding the square root if (discriminant < 0) { // This checks for an imaginary number // println("This is an imaginary number."); } else { // This executes the rest of the equation if it is not imaginary // println("The discriminant (result inside radical) is " + (Math.sqrt(discriminant))); // Prints & squares the discriminate // int dividend = 2*a; // Simply multiplies the 2 on the bottom of the equation times a // double posativeEquation = ((-b) + Math.sqrt(discriminant))/dividend; // These do the basic math to finish up the problem double negativeEquation = ((-b) - Math.sqrt(discriminant))/dividend; println("Result of addittion equation is " + posativeEquation + "."); println("Result of subtraction equation is " + negativeEquation + "."); println("----Would you like to compute another formula?"); int r = readInt("Enter y or n"); // Everything below this will cause the program to run again if y is read int y = repeat; int n = ABORT; if (r = y); { repeat(); } if (r = n); { ABORT(); } } } } } }

I kinda realize this maybe kindav painful to look at, which is another question I had. My karel programs looked extremely neat, but these end up looking pretty rough. Could I get some advice about how to make this program look a little neater?

Like I was saying before Im really looking for something that I could just call on in "y" that would cause the program to restart.

I know this maybe pretty bad, but for my first real program Im pretty proud of it! Thx in advance for any advice you can give that I could use to improve!