fixed buffer overflow due to improper use of fscanf

20230413/4/main.c

@@ -12,14 +12,20 @@ typedef struct {
 
 Person person_read(FILE *f) {
     Person person;
-    // FIXME: buffer overflow
+    char format[5 + 5 + 3];
+    sprintf(
+        format, "%%%zus%%%zus%%hu",
+        ARR_LEN(person.first_name),
+        ARR_LEN(person.last_name)
+    );
     fscanf(
-        f, "%s %s %hu\n",
+        f, format,
         person.first_name,
         person.last_name,
         &person.age
     );
     return person;
+
 }
 
 void person_print(FILE *f, Person person) {