1 files changed, 16 insertions, 2 deletions

diff --git a/include/syntax_essentials.h b/include/syntax_essentials.h
index 181cb99..2327636 100644
--- a/include/syntax_essentials.h
+++ b/include/syntax_essentials.h
@@ -2,6 +2,20 @@
 
 /**
  *
+ * TASK 0: result codes
+ * --------------------
+ * Idiomatic named return codes instead of raw numbers.
+ */
+typedef enum {
+  RESULT_VALID = 0,
+  RESULT_INVALID_NAME = 1,
+  RESULT_INVALID_INDEX = 2,
+  RESULT_ARRAY_FULL = 3,
+  RESULT_NULL_POINTER = 4
+} Result;
+
+/**
+ *
  * TASK 1: validate_first_name
  * ---------------------------
  * Check if the first name is valid.
@@ -70,7 +84,7 @@ typedef struct {
  * -------------------
  * Add a student to an array of Student. Return 0 if added.
  */
-int add_student(Student *array, int max_size, const char *name,
+int add_student(Student *array, int max_length, const char *name,
                 const char *index);
 
 /**
@@ -78,4 +92,4 @@ int add_student(Student *array, int max_size, const char *name,
  * ------------------------
  * Return error message string for code returned by register_student
  */
-const char *get_error_message(int code);
+const char *get_error_message(int code);
\ No newline at end of file