diff --git a/The-Nook-GamesTM/Fundamentals/basic_tree.c b/The-Nook-GamesTM/Fundamentals/basic_tree.c
index 3d0c583..8e53f1d 100644
--- a/The-Nook-GamesTM/Fundamentals/basic_tree.c
+++ b/The-Nook-GamesTM/Fundamentals/basic_tree.c
@@ -1,6 +1,8 @@
 #include "basic_tree.h"
 #include <stdlib.h>
 #include <stdio.h>
+#include <sys/types.h>
+#include <time.h>
 // FCTs perso
 
 struct queue *enqueue(struct queue *queue, struct node *node){
@@ -52,6 +54,15 @@ void queue_destroy(struct queue *queue){
     }
 }
 
+void delete_tree(struct node *root){
+    
+    if(!root) return;
+
+    delete_tree(root->left);
+    delete_tree(root->right);
+    free(root);
+}
+
 int find(struct node *root, int value){
 
     // -1 : erreur, 0 : pas de leaf/node, x>0 : nombre trouvé
@@ -79,9 +90,6 @@ int find(struct node *root, int value){
     free (queue);
     return found;
 
-
-
-
 }
 
 
@@ -166,17 +174,127 @@ void delete_leaf(struct node *root, int value){
      
 }
     
-struct node *delete_node(struct node *root, int value);
+struct node *delete_node(struct node *root, int value){
 
-void pretty_print(struct node *root);
+    if(!root) return NULL;
 
+    // 3 cas : 1 si le node a un child, 2 si le node a deux nodes, 3 si il en a pas
+
+    // Si il a pas de child 
+    if(!root->left && !root->right){
+        if(root->value == value){
+            free(root);
+            return NULL;
+        }
+        return root;
+    }
+    
+    struct node *targ = NULL;
+    struct node *prec_child = NULL;
+    struct node *prec_dad = NULL;
+
+    struct queue *queue = enqueue(NULL, root);
+
+    while(queue != NULL){
+
+        struct node *tmp = dequeue(&queue);
+        
+
+        if (tmp->value == value && !targ) targ = tmp;
+        
+        if(tmp->left){
+            prec_dad = tmp;
+            queue = enqueue(queue, tmp->left);
+            prec_child = tmp->left;
+        }
+
+        if(tmp->right){
+            prec_dad = tmp;
+            queue = enqueue(queue, tmp->right);
+            prec_child = tmp->right;
+        }
+    }
+    if(targ){
+
+        targ->value = prec_child->value;
+
+        if(prec_dad->right == prec_child) prec_dad->right = NULL;
+        else prec_dad->left = NULL;
+        free(prec_child);
+    }
+    
+    return root;
+}
+
+void pretty_print(struct node *root){
+
+
+    if(!root) return;
+    struct queue *queue = enqueue(NULL, root);
+    int index_l = 1;
+    int index_n = 0;
+
+    while(queue){
+
+        struct node *tmp = dequeue(&queue);
+        index_l--;
+
+        printf("%d", tmp->value);
+
+        if(tmp->left){
+            queue = enqueue(queue, tmp->left);
+            index_n++;
+        }
+        
+        if(tmp->right){
+            queue = enqueue(queue, tmp->right);
+            index_n++;
+        }
+        if(index_l > 0) printf("\t");
+        else{
+            printf("\n");
+            index_l = index_n;
+            index_n = 0;
+        }
+    }
+}
+
+int main(int argc, char *argv[]) {
+  if (argc == 1)
+      return 1;
+  
+  struct node *root = NULL;
+  for (int i = 1; i < argc; i++) {
+      root = insert(root, atoi(argv[i]));
+  }
+
+  pretty_print(root);
+  
+  delete_tree(root);
+  return 0;
+}
+
+
+
+/*
+int main() {
+  struct node *root = insert(NULL, 0);
+  root = insert(root, 1);
+  root = insert(root, 2);
+  root = delete_node(root, 0);
+  printf("%d, %d\n", root->value, root->left->value); // 2, 1
+}
+*/
+
+/*
 int main() {
   struct node *root = insert(NULL, 0);
   root = insert(root, 1);
   root = insert(root, 2);
   delete_leaf(root, 2);
   printf("%d, %d\n", root->value, root->left->value); // 0, 1
-}
+
+}i*/
 
 
 /*
diff --git a/The-Nook-GamesTM/Fundamentals/expansion.c b/The-Nook-GamesTM/Fundamentals/expansion.c
index 5931a94..7be3a68 100644
--- a/The-Nook-GamesTM/Fundamentals/expansion.c
+++ b/The-Nook-GamesTM/Fundamentals/expansion.c
@@ -1,3 +1,5 @@
 #include "expansion.h"
 
-char *weird_copy(const char *input);
\ No newline at end of file
+char *weird_copy(const char *input){
+    return NULL;
+}
diff --git a/The-Nook-GamesTM/Fundamentals/parsing.c b/The-Nook-GamesTM/Fundamentals/parsing.c
index f4ef08b..2072d2d 100644
--- a/The-Nook-GamesTM/Fundamentals/parsing.c
+++ b/The-Nook-GamesTM/Fundamentals/parsing.c
@@ -4,10 +4,18 @@
 #include <stdlib.h>
 #include <sys/types.h>
 
-struct node *create_node(const char *line);
+struct node *create_node(const char *line){
 
-struct node *parse_file(const char *filename);
+    return NULL;
+}
 
-void execute_tree(struct node *node, int value);
+struct node *parse_file(const char *filename){
 
-int main(int argc, char *argv[]);
\ No newline at end of file
+    return NULL;
+}
+
+void execute_tree(struct node *node, int value){
+    return NULL;
+}
+
+int main(int argc, char *argv[]);
diff --git a/The-Nook-GamesTM/Fundamentals/vector_tree.c b/The-Nook-GamesTM/Fundamentals/vector_tree.c
index 5e5ac7e..8ddd919 100644
--- a/The-Nook-GamesTM/Fundamentals/vector_tree.c
+++ b/The-Nook-GamesTM/Fundamentals/vector_tree.c
@@ -1,7 +1,12 @@
 #include "vector_tree.h"
 
-struct vector *insert(struct vector *tree, int value);
+struct vector *insert(struct vector *tree, int value){
 
-void delete_node(struct vector *tree, int value);
+    return NULL;
+}
 
-void pretty_print(struct vector *tree);
\ No newline at end of file
+void delete_node(struct vector *tree, int value){
+    return;
+}
+
+void pretty_print(struct vector *tree);
diff --git a/The-Nook-GamesTM/Proficiencies/evaluate_rpn.c b/The-Nook-GamesTM/Proficiencies/evaluate_rpn.c
index 97cec10..5bbc632 100644
--- a/The-Nook-GamesTM/Proficiencies/evaluate_rpn.c
+++ b/The-Nook-GamesTM/Proficiencies/evaluate_rpn.c
@@ -1,3 +1,3 @@
 #include "evaluate_rpn.h"
 
-int evaluate_rpn(struct queue *queue);
\ No newline at end of file
+int evaluate_rpn(struct queue *queue){return 0 ;}
diff --git a/The-Nook-GamesTM/Proficiencies/main.c b/The-Nook-GamesTM/Proficiencies/main.c
index d746ac7..56b2e88 100644
--- a/The-Nook-GamesTM/Proficiencies/main.c
+++ b/The-Nook-GamesTM/Proficiencies/main.c
@@ -1 +1 @@
-int main(int argc, char** argv);
\ No newline at end of file
+int main(int argc, char** argv){return 0;}
diff --git a/The-Nook-GamesTM/Proficiencies/parse_exp.c b/The-Nook-GamesTM/Proficiencies/parse_exp.c
index 7e005ee..5161cf9 100644
--- a/The-Nook-GamesTM/Proficiencies/parse_exp.c
+++ b/The-Nook-GamesTM/Proficiencies/parse_exp.c
@@ -1,3 +1,3 @@
 #include "parse_exp.h"
 
-struct queue *parse_expression(const char *str);
\ No newline at end of file
+struct queue *parse_expression(const char *str){return NULL;}