Feature01

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>

README.md

@@ -1,4 +1,4 @@
-# Quadratic Equation Solver - Java Assignment 005
+# NotIt Equation Solver - Java Assignment 005
 
 **Instructions:**
 1. Fork this repository to your GitHub account.
@@ -8,7 +8,7 @@
 ## Assignment
 
 **Objective:**
-Create a file named `src/Quadratic.java` and write a program that calculates the roots of the quadratic equation:
+Create a file named `src/NotIt.java` and write a program that calculates the roots of the quadratic equation:
 $$ax^2 + bx + c = 0$$
 using the quadratic formula:
 $$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$

src/Quadratic.java

@@ -0,0 +1,51 @@
+
+import java.util.Scanner;
+
+    public class Quadratic {
+        public static void calculateQuadratic(int a, int b, int c) {
+            double firstPart, squareRootofQuadratic, denominator, xpositive, xnegative, checkForRootspositive, checkForRootsNegative;
+            firstPart = Math.pow(b, 2) - (4 * a * c);
+            squareRootofQuadratic = Math.sqrt(firstPart);
+            denominator = 2 * a;
+            xpositive = (-b + squareRootofQuadratic) / denominator;
+            xnegative = (-b - squareRootofQuadratic) / denominator;
+            checkForRootsNegative = (a * Math.pow(xnegative, 2)) + (b * xnegative) + c;
+            checkForRootspositive = (a * Math.pow(xpositive, 2)) + (b * xpositive) + c;
+
+            if (firstPart >= 0) {
+                if (checkForRootspositive == 0) {
+                    System.out.println("a= " + a);
+                    System.out.println("b= " + b);
+                    System.out.println("c= " + c);
+                    System.out.println("The quadratic formula states that x= " + xpositive+ " or " + xnegative);
+                    System.out.print("The quadratic equation ax^2+bx+c using x= " +xpositive+" is equal to " + checkForRootspositive+". Therefore x= "+xpositive+" a solution to the quadratic equation.");
+                } else if (checkForRootsNegative == 0) {
+                    System.out.println("a= " + a);
+                    System.out.println("b= " + b);
+                    System.out.println("c= " + c);
+                    System.out.println("The quadratic formula states that x= " + xnegative+ " or "+xpositive);
+                    System.out.print("The quadratic equation ax^2+bx+c using x= " +xnegative+" is equal to " + checkForRootsNegative+". Therefore x= "+xnegative+" a solution to the quadratic equation.");
+
+                } else {
+                    System.out.println("Error in computing formula as the roots of the quadratic equation DO NOT equal 0.");
+                }
+            } else {
+                System.out.println("Cannot compute quadratic formula, cannot take the square root of a negative number.");
+            }
+
+        }
+
+        public static void main(String[] args) {
+            int a, b, c;
+            Scanner in = new Scanner(System.in);
+            System.out.println("Enter three possible integer values for a, b, and c of the quadratic formula.");
+            a = in.nextInt();
+            b = in.nextInt();
+            c = in.nextInt();
+            if (a == 0) {
+                System.out.println("a CANNOT equal to zero in the quadratic formula.");
+            } else {
+                calculateQuadratic(a, b, c);
+            }
+        }
+    }