[Xue Yushan] iP

src/main/java/Duke.java

@@ -1,3 +1,6 @@
+import java.util.Scanner;
+import java.lang.String;
+
 public class Duke {
     public static void main(String[] args) {
         String logo = " ____        _        \n"
@@ -6,5 +9,49 @@ public static void main(String[] args) {
                 + "| |_| | |_| |   <  __/\n"
                 + "|____/ \\__,_|_|\\_\\___|\n";
         System.out.println("Hello from\n" + logo);
+
+        System.out.println("____________________________________________________________\n"
+                + "Hello! I'm Duke\n"
+                + "What can I do for you?\n"
+                + "____________________________________________________________\n");
+        Scanner input = new Scanner(System.in);
+        while (true) {
+            String str = input.nextLine();
+            if (str.equals("bye")) {
+                System.out.println("____________________________________________________________\n"
+                        + "Bye. Hope to see you again soon!\n"
+                        + "____________________________________________________________\n");
+                break;
+            }
+            else if (str.equals("list")) {
+                System.out.println("____________________________________________________________\n"
+                        + "Here are the tasks in your list: ");
+                List.printItems();
+                System.out.println("____________________________________________________________");
+            }
+            else if (str.contains("Done ") == true) {
+                String nums = "";
+                for (int i = 0; i < str.length(); i++) {
+                    char c = str.charAt(i);
+                    if (Character.isDigit(c) == true) {
+                        nums += c;
+                    }
+                }
+                int index = Integer.parseInt(nums);
+                if (index > List.listSize) {
+                    System.out.println("____________________________________________________________\n"
+                            + "The index is out of range.\n"
+                            + "____________________________________________________________\n");
+                } else {
+                    List.mark(index);
+                    System.out.println("____________________________________________________________\n"
+                            + "Nice! I've marked this task as done: ");
+                    List.markedItems();
+                    System.out.println("____________________________________________________________");
+                }
+            } else {
+                List.addToList(str);
+            }
+        }
     }
-}
+}

src/main/java/List.java

@@ -0,0 +1,42 @@
+public class List {
+    private static String[] currentList = new String[100];
+    public static int listSize = 0;
+    private static int[] isDone = new int[100];
+
+    public static void addToList(String input) {
+        currentList[listSize] =  input;
+        listSize++;
+        System.out.println("____________________________________________________________\n"
+                + "Added: " + input + "\n"
+                + "____________________________________________________________\n");
+    }
+
+    public static void printItems() {
+        if (listSize == 0) {
+            System.out.println("The list is empty.");
+        } else {
+            for (int i = 1; i <= listSize; i++) {
+                System.out.print(i + ". " );
+                System.out.print("[");
+                if (isDone[i-1] == 1) {
+                    System.out.print("X");
+                } else {
+                    System.out.print(" ");
+                }
+                System.out.print("] " + currentList[i-1] + "\n");
+            }
+        }
+    }
+
+    public static void mark(int number) {
+        isDone[number-1] = 1;
+    }
+
+    public static void markedItems() {
+        for (int i = 0; i < isDone.length; i++) {
+            if (isDone[i] == 1) {
+                System.out.println("[X] " + currentList[i]);
+            }
+        }
+    }
+}

src/main/java/list.java

@@ -0,0 +1,42 @@
+public class List {
+    private static String[] currentList = new String[100];
+    public static int listSize = 0;
+    private static int[] isDone = new int[100];
+
+    public static void addToList(String input) {
+        currentList[listSize] =  input;
+        listSize++;
+        System.out.println("____________________________________________________________\n"
+                + "Added: " + input + "\n"
+                + "____________________________________________________________\n");
+    }
+
+    public static void printItems() {
+        if (listSize == 0) {
+            System.out.println("The list is empty.");
+        } else {
+            for (int i = 1; i <= listSize; i++) {
+                System.out.print(i + ". " );
+                System.out.print("[");
+                if (isDone[i-1] == 1) {
+                    System.out.print("X");
+                } else {
+                    System.out.print(" ");
+                }
+                System.out.print("] " + currentList[i-1] + "\n");
+            }
+        }
+    }
+
+    public static void mark(int number) {
+        isDone[number-1] = 1;
+    }
+
+    public static void markedItems() {
+        for (int i = 0; i < isDone.length; i++) {
+            if (isDone[i] == 1) {
+                System.out.println("[X] " + currentList[i]);
+            }
+        }
+    }
+}