Finished Assignment-005

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 +1,62 @@
+import java.util.Scanner;
+
+//import static java.lang.Math.pow;
+
+public class Quadratic {
+    public static void main(String[] args) {
+        double root1, root2;
+        //Prompt the user to input integers for (a), (b), and (c).
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter a:");
+        int inputa =ValidateInput(scanner.nextLine());
+        System.out.print("Enter b:");
+        int inputb = ValidateInput(scanner.nextLine());
+        System.out.print("Enter c:");
+        int intputc= ValidateInput(scanner.nextLine());
+        // calculate the determinant (b2 - 4ac)
+        double  determinant  = inputb*inputb-4.0*inputa*intputc;
+        // check if determinant is greater than 0
+        if(determinant  >0.0){
+            // two real and distinct roots
+            root1=(-inputb + Math.sqrt(determinant ))/(2.0*inputa);
+            root2=(-inputb - Math.sqrt(determinant ))/(2.0*inputa);
+            System.out.printf("The root1 is %.2f and root2 is %.2f ",root1,root2 );
+            // check if determinant is equal to 0
+        }else if(determinant  ==0.0){
+            // two real and equal roots
+            // determinant is equal to 0
+            // so -b + 0 == -b
+            root1 = root2 = -inputb / (2.0 * inputa);
+            System.out.printf("root1 = root2 = %.2f ",root1);
+            // if determinant is less than zero
+        }else{
+            // roots are complex number and distinct
+            double real = -inputb / (2.0 * inputa);
+            double imaginary = Math.sqrt(-determinant) / (2.0 * inputa);
+            System.out.format("root1 = %.2f+%.2fi", real, imaginary);
+            System.out.format("\nroot2 = %.2f-%.2fi", real, imaginary);
+        }
+
+
+
+
+
+    }
+    public  static int ValidateInput(String input){
+        try {
+            int value = Integer.parseInt(input);
+            if(value<=0){
+                System.out.println("a can't be 0");
+                System.exit(1);
+            }
+        return value;
+
+        }catch (NumberFormatException e){
+            System.out.println("Invalid input and please enter a valid int");
+            System.exit(1);
+            return 0;
+        }
+    }
+}
+
+