/in/l6.c: In function 'main':
/in/l6.c:43:9: error: unused variable 'price' [-Werror=unused-variable]
     int price;
         ^~~~~
/in/l6.c:42:9: error: unused variable 'nights' [-Werror=unused-variable]
     int nights;
         ^~~~~~
/in/l6.c:41:9: error: unused variable 'breakfast' [-Werror=unused-variable]
     int breakfast;
         ^~~~~~~~~
/in/l6.c:40:9: error: unused variable 'key' [-Werror=unused-variable]
     int key;
         ^~~
/in/l6.c:36:9: error: unused variable 'visitors' [-Werror=unused-variable]
     int visitors;
         ^~~~~~~~
/in/l6.c:35:9: error: unused variable 'vacant' [-Werror=unused-variable]
     int vacant;
         ^~~~~~
/in/l6.c:34:9: error: unused variable 'type' [-Werror=unused-variable]
     int type;
         ^~~~
cc1: all warnings being treated as errors