TP2: cast double to int the compare method returned value.

[TP_POO.git] / Arbres / ArbreBinaire.java

diff --git a/Arbres/ArbreBinaire.java b/Arbres/ArbreBinaire.java
index 836531272860dd88927bf4e84f1c848e62505fde..fc19203a7e4b9025a49e3628be08079abc12629e 100644 (file)
--- a/Arbres/ArbreBinaire.java
+++ b/Arbres/ArbreBinaire.java
@@ -1,7 +1,7 @@
 
 /**
  * Binary tree class.
- * A binary tree is a ordered value tree with only two childs by node
+ * A binary tree is a ordered value tree with only two childs per node
  */
 public class ArbreBinaire {
 
@@ -66,12 +66,137 @@ public class ArbreBinaire {
         return (getRootNode() == null);
     }
 
+    private IntNode inserer_rec(IntNode currentNode, int value) {
+        if (currentNode == null) {
+            return new IntNode(value);
+        }
+        if (value < currentNode.getData()) {
+            currentNode.setLeftNode(inserer_rec(currentNode.getLeftNode(), value));
+        } else if (value > currentNode.getData()) {
+            currentNode.setRightNode(inserer_rec(currentNode.getRightNode(), value));
+        } /* skip the equality case */
+        return currentNode;
+    }
+
     public void inserer(int value) {
+        setRootNode(inserer_rec(rootNode, value));
+    }
 
+    private IntNode supprimer_rec(IntNode currentNode, int value) {
+        if (currentNode == null) {
+            return null;
+        }
+        if (value == currentNode.getData()) {
+            if (currentNode.getLeftNode() == null && currentNode.getRightNode() == null) {
+                return null;
+            } else if (currentNode.getRightNode() == null) {
+                return currentNode.getLeftNode();
+            } else if (currentNode.getLeftNode() == null) {
+                return currentNode.getRightNode();
+            } else {
+                /*
+                * First, we need to find the node that will replace the deleted node.
+                * We’ll use the smallest node of the node to be deleted’s right sub-tree.
+                * Then, we assign the smallest value to the node to delete and after that,
+                * we’ll delete it from the right subtree.
+                */
+                int smallestValue = findSmallestData(currentNode.getRightNode());
+                currentNode.setData(smallestValue);
+                currentNode.setRightNode(supprimer_rec(currentNode.getRightNode(), smallestValue));
+                return currentNode;
+            }
+        } else if (value < currentNode.getData()) {
+            currentNode.setLeftNode(supprimer_rec(currentNode.getLeftNode(), value));
+        } else {
+            currentNode.setRightNode(supprimer_rec(currentNode.getRightNode(), value));
+        }
+        return currentNode;
     }
 
     public void supprimer(int value) {
+        supprimer_rec(rootNode, value);
+    }
+
+    private boolean hasDataRec(IntNode currentNode, int value) {
+        if (currentNode == null) {
+            return false;
+        }
+        if (value == currentNode.getData()) {
+            return true;
+        }
+        return value < currentNode.getData() ? hasDataRec(currentNode.getLeftNode(), value) : hasDataRec(currentNode.getRightNode(), value);
+    }
+
+    public boolean hasData(int value) {
+        return hasDataRec(rootNode, value);
+    }
+
+    private int findSmallestData(IntNode node) {
+        return node.getLeftNode() == null ? node.getData() : findSmallestData(node.getLeftNode());
+    }
+
+    private void afficher_rec(IntNode currentNode) {
+        if (currentNode != null) {
+            afficher_rec(currentNode.getLeftNode());
+            System.out.print(currentNode.getData() + " ");
+            afficher_rec(currentNode.getRightNode());
+        }
+    }
+
+    public void afficher() {
+        afficher_rec(rootNode);
+        System.out.println();
+    }
+
+    private void afficher_arbre_rec(IntNode currentNode, int column) {
+        if (currentNode != null) {
+            afficher_arbre_rec(currentNode.getRightNode(), column + 1);
+            for (int i = 0; i < column; i++) {
+                System.out.print("   ");
+            }
+            System.out.println(currentNode.getData());
+            afficher_arbre_rec(currentNode.getLeftNode(), column + 1);
+        }
+    }
+
+    public void afficher_arbre() {
+        afficher_arbre_rec(rootNode, 1);
+    }
+
+    public static void main(String[] args) {
+        ArbreBinaire bTree = new ArbreBinaire();
+
+        bTree.inserer(2);
+        bTree.inserer(6);
+        bTree.inserer(4);
+        bTree.inserer(5);
+        bTree.inserer(1);
+        bTree.inserer(0);
+
+        bTree.afficher();
+        bTree.afficher_arbre();
+
+        bTree.supprimer(4);
+
+        bTree.afficher();
+        bTree.afficher_arbre();
+
+        bTree.supprimer(6);
+
+        bTree.afficher();
+        bTree.afficher_arbre();
+
+        bTree.inserer(2);
+        bTree.inserer(7);
+        bTree.inserer(3);
+        bTree.inserer(9);
+        bTree.inserer(11);
+        bTree.inserer(10);
+        bTree.inserer(8);
+        bTree.inserer(4);
 
+        bTree.afficher();
+        bTree.afficher_arbre();
     }
 
 }