diff --git a/cv7/program.c b/cv7/program.c
index 89ca066..bfc9c86 100644
--- a/cv7/program.c
+++ b/cv7/program.c
@@ -68,14 +68,30 @@ void run_expert_system(Node *node) {
     }
 }
 
+void create_default_knowledge_base() {
+    FILE *file = fopen("knowledge_base.txt", "w");
+    if (!file) {
+        perror("Failed to create the knowledge base file");
+        exit(1);
+    }
+    fprintf(file, "Je to ovocie alebo zelenina?\n");
+    fprintf(file, "*Jablko\n");
+    fprintf(file, "*Mrkva\n");
+    fclose(file);
+    printf("Default knowledge base file 'knowledge_base.txt' has been created.\n");
+}
+
 int main() {
-    printf("Attempting to open the knowledge base file...\n");
     FILE *file = fopen("knowledge_base.txt", "r");
     if (!file) {
-        perror("Failed to open the knowledge base file");
-        return 1;
+        printf("Knowledge base file not found. Creating default file.\n");
+        create_default_knowledge_base();
+        file = fopen("knowledge_base.txt", "r");
+        if (!file) {
+            perror("Failed to open the newly created knowledge base file");
+            return 1;
+        }
     }
-    printf("File successfully opened.\n");
 
     Node *root = parse_knowledge_base(file);
     fclose(file);