refresh

du3/program.c

@@ -97,13 +97,13 @@ int main() {
             print_stack(s);
         }
         else {
-                printf("no input");
+                printf("bad input\n"); 
                 destroy_stack(s);
                 return 0;
         }
     }
     destroy_stack(s);
-    printf("no input\n");
+    printf("bad input\n"); 
     return 0;
 
 }