Merge pull request #63 from sadeem-albir/patch-5

Update variables.c
ohkimur · Mar 5, 2024 · d7272a2 · d7272a2
2 parents 7730dc5 + 37865c3
commit d7272a2
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/chapter_4/exercise_4_06/variables.c b/chapter_4/exercise_4_06/variables.c
@@ -121,7 +121,15 @@ int main(void)
       break;
 
     case VARGET:
-      push(var_buff[var - 'a']);
+      // Check if the variable has been assigned previously
+      if (var - 'a' <= (varindex - 1))
+      {
+        push(var_buff[var - 'a']);
+      }
+      else
+      {
+        printf("Error: undefined variable.\n");
+      }
       break;
 
     case '\n':