Java Assignment 005 Complete

Java-Assignment-005.iml

@@ -5,6 +5,7 @@
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
     </content>
+    <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>

src/Quadratic.java

@@ -0,0 +1,54 @@
+import java.util.Scanner;
+/**
+ *
+ * @author Trevor Hartman
+ * @author Eliot Rodriguez
+ *
+ * @since version 1.0
+ * February 22, 2024
+ *
+ */
+public class Quadratic {
+    static Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args) {
+        System.out.println("Calculate the roots of the quadratic equation ax^2+bx+c=0 by inputting three integers.");
+        System.out.println("Input a value for a: ");
+        if (!scanner.hasNextInt()) { //validates the input to ensure that it is an integer
+            String invalidInt = scanner.next(); //makes the invalid input the value of invalidInt
+            System.out.println(invalidInt + " is an invalid input");//Uses invalidInt to display to the user that the input is invalid
+            return;
+        }
+        int a = scanner.nextInt();
+        if (a==0) {
+            System.err.println("To avoid division by 0, a cannot be 0");
+            return;
+        }
+        System.out.println("Input a value for b: ");
+        if (!scanner.hasNextInt()) {
+            String invalidInt = scanner.next();
+            System.out.println(invalidInt + " is an invalid input");
+            return;
+        }
+        int b = scanner.nextInt();
+        System.out.println("Input a value for c: ");
+        if (!scanner.hasNextInt()) {
+            String invalidInt = scanner.next();
+            System.out.println(invalidInt + " is an invalid input");
+            return;
+        }
+        int c = scanner.nextInt();
+        double stepOne = Math.pow(b, 2.0) - (4.0 * a * c); //evaluating the square root of b^2-4ac
+        if (stepOne > 0) { //avoids taking the square root of a negative number
+            double stepTwo = (double) -b+(Math.sqrt(stepOne))/2*a; //evaluating the formula for -b +
+            double stepThree = (double) -b-(Math.sqrt(stepOne))/2*a;//evaluating the formula for -b -
+            System.out.printf("With the given inputs the roots are = %f, %f", stepTwo, stepThree);
+        }
+        else if (stepOne == 0) { //For when there is only one solution
+            double stepFour = (double) -b/2*a; //Since stepOne equals 0, this would have to be the equation
+            System.out.printf("With the given inputs the root is %f", stepFour);
+        } else {
+            System.out.println("There is no real solution"); //there would have to be no real solutions for it to get to this part
+        }
+    }
+}