/in/foo.c: In function 'main':
/in/foo.c:5:18: warning: format '%lf' expects a matching 'double *' argument [-Wformat=]
    5 |         scanf("%lf,&fahrenheit");
      |                ~~^
      |                  |
      |                  double *
/in/foo.c:8:17: error: expected ';' before '}' token
    8 |         return 0
      |                 ^
      |                 ;
    9 | }
      | ~