MP4/lab14

Assignments/MP4_CalebFontenot/src/mp4_calebfontenot/MP4_CalebFontenot.java

@@ -0,0 +1,95 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package mp4_calebfontenot;
+
+/**
+ *
+ * @author caleb
+ */
+public class MP4_CalebFontenot
+{
+
+    /**
+     * If the result from Step 4 is divisible by 10, the card number is valid;
+     * otherwise, it is invalid. For example, the number 4388576018402626 is
+     * invalid, but the number 4388576018410707 is valid
+     *
+     * @param CreditCard
+     * @return
+     */
+    public static boolean isValid(String CreditCard)
+    {
+        return true;
+    }
+
+    /**
+     * Sum the results from Steps 1, 2 and Step 3. 37 + 38 = 75
+     *
+     * @param step1andSep2 result form step 1 and step 2
+     * @param step3 result form step 3
+     * @return
+     */
+    public static int sum(int step1andSep2, int step3)
+    {
+        return step1andSep2 + step3;
+    }
+
+    /**
+     * Add all digits in the odd places from right to left in the card number. 6
+     * + 6 + 0 + 8 + 0 + 7 + 8 + 3 = 38
+     *
+     * @param -creditCard the credit card number to be processed.
+     * @return the sum of digits at odd position from right to left.
+     */
+    public static int addOddNumbersFromRightToLeft(String creditCard)
+    {
+        return -1;
+    }
+
+    /**
+     * Double every second digit from right to left. If doubling of a digit
+     * results in a two-digit number, add up the two digits to get a
+     * single-digit number. 2 * 2 = 4 2 * 2 = 4 4 * 2 = 8 1 * 2 = 2 6 * 2 = 12
+     * (1 + 2 = 3) 5 * 2 = 10 (1 + 0 = 1) 8 * 2 = 16 (1 + 6 = 7) 4 * 2 = 8 Step
+     * 2 Now add all single-digit numbers from Step 1. 4 + 4 + 8 + 2 + 3 + 1 + 7
+     * + 8 = 37
+     *
+     * @param -creditCard the credit card number to be processed.
+     * @return
+     */
+    public static int doubleDigitsAndSumSingleDigits(String creditCard)
+    {
+        return -1;
+    }
+
+    /**
+     * Displays Q/q or C/c. If the user enters C, it read the credit number and
+     * returns it as String. If the user types Q/q returns 0
+     *
+     * @return a string with credit card number or 0.
+     */
+    public static String menu()
+    {
+        return "creditcard number or 0";
+    }
+/**
+ * 
+ * @param args 
+ */
+    public static void main(String[] args)
+    {
+        String userInput = menu();
+        while (!userInput.equals("0") )//user has not entered Q/q
+          {
+            MP4.doubleDigitsAndSumSingleDigits(userInput);
+            //complete the code
+            userInput = menu();
+            
+          }
+    }
+
+}
+