From cf3e69ac7c191f7c1b152d68b7f0bfe084378c64 Mon Sep 17 00:00:00 2001
From: Matej Hajduk <matej.hajduk@student.tuke.sk>
Date: Wed, 12 Nov 2025 10:16:28 +0100
Subject: [PATCH] du6

---
 du6/program.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 89 insertions(+), 1 deletion(-)

diff --git a/du6/program.c b/du6/program.c
index 4fdee7c..3cb7c6f 100644
--- a/du6/program.c
+++ b/du6/program.c
@@ -9,9 +9,97 @@ typedef struct tree{
 	struct tree* right; // nie
 }Tree;
 
-void trim_newline(char *str){
+void trim(char *str){
 	size_t len = strlen(str);
 	if(len > 0 && (str[len -1] == '\n')){
 		str[len - 1] = '\0';
 	}
+}  //odstranenie konca riadku
+ 
+Tree* read_tree() {
+	char buffer[256];
+	if(fgets(buffer,256,stdin))return NULL;
+	if(strcmp(buffer, "\n") == 0 ) return NULL;
+	
+	trim(buffer);
+
+	Tree* node = calloc(1, sizeof(node));
+	
+	strcpy(node->value, buffer);
+	if(buffer[0] == '*'){
+		return node;	
+	}
+	
+	node->left = read_tree();
+	node->right = read_tree();
+
+	return node;
+}
+
+void destroy_tree(Tree* t){
+	if(!t) return;
+	destroy_tree(t->left);
+	destry_tree(t->right);
+	free(t);
+}
+int count_leaves(Tree* t){
+	if(!t) return 0;
+	if(!t->left && !t->right) return 1;
+	return count_leaves(5->left) + count_leaves(t->right);
+
+}
+void run_system(Tree* t) {
+    if (!t) return;
+
+    // Ak ide o odpoveď (list)
+    if (t->value[0] == '*') {
+        printf("%s\n", t->value);
+        printf("Koniec\n");
+        return;
+    }
+
+    // Otázka
+    printf("%s\n", t->value);
+
+    char ans[10];
+    if (!fgets(ans, sizeof(ans), stdin)) {
+        printf("Chyba vstupu.\n");
+        return;
+    }
+
+    trim_newline(ans);
+
+    if (strcmp(ans, "a") == 0)
+        run_system(t->left);
+    else if (strcmp(ans, "n") == 0)
+        run_system(t->right);
+    else {
+        printf("Odpovedajte 'a' pre prvu moznost alebo 'n' pre druhu moznost.\n");
+    }
+}
+int main() {
+    Tree* root = read_tree();
+
+    if (!root) {
+        printf("Chyba: nepodarilo sa načítať bázu pravidiel.\n");
+        return 1;
+    }
+
+    int count = count_leaves(root);
+
+    printf("Expert z bufetu to vie.\n");
+    printf("Pozna %d druhov ovocia a zeleniny.\n", count);
+
+    // overenie prázdneho riadku medzi databázou a vstupom používateľa
+    char empty[SIZE];
+    if (!fgets(empty, SIZE, stdin) || strcmp(empty, "\n") != 0) {
+        printf("Chyba: chýba prázdny riadok medzi databázou a vstupom.\n");
+        destroy_tree(root);
+        return 1;
+    }
+
+    run_system(root);
+
+    destroy_tree(root);
+    return 0;
 }