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Assignments/MP3_CalebFontenot/src/mp3_calebfontenot/Stats.java

@@ -4,13 +4,53 @@
  */
 package mp3_calebfontenot;
 
+import java.util.Scanner;
+
 /**
  *
  * @author caleb
  */
 public class Stats {
-    public static void main(String[] args)
-    {
-        
+
+    public static void main(String[] args) {
+        // Create scanner
+        Scanner input = new Scanner(System.in);
+        // Define variables
+        double mean = 0; //It's twice as mean
+        double inputSum = 0, numberOfTimesRun = 0, inputPow = 0, deviation = 0;
+        String userInput = "";
+
+        // Prompt for input
+        do {
+            System.out.println("Press Y/y to enter a series of numbers or Q/q to quit.");
+            System.out.println("Current sum: " + inputSum);
+            userInput = input.next();
+            if (userInput.toLowerCase().equals("y")) {
+                try {
+                    do {
+                        System.out.print("Please enter a series of numbers; Type '-1' to quit (no quotes, you doofus!): ");
+                        userInput = input.next();
+                        if (Double.parseDouble(userInput) != -1) {
+                            inputSum += Double.parseDouble(userInput);
+                            inputPow += Math.pow(Double.parseDouble(userInput), 2);
+                            numberOfTimesRun++; // counter to store number of times we've added to input sum
+                        }
+                        System.out.println("Current sum: " + inputSum);
+                        System.out.println("Input sum^2: " + inputPow);
+                    } while (Double.parseDouble(userInput) != -1);
+                } catch (Exception e) {
+                    System.out.println("Invalid input!");
+                }
+            }
+            // Calculate mean
+            mean = inputSum / numberOfTimesRun;
+            // Calculate deviation
+            deviation = ((numberOfTimesRun - 1) / (inputPow - (Math.pow(inputSum, 2) / numberOfTimesRun)));
+            
+            System.out.println();
+            System.out.println("The mean is: " + mean);
+            System.out.println("The deviation is: " + deviation);
+
+        } while (!(userInput.toLowerCase().equals("q")));
     }
 }