/in/foo.cc:9:8: warning: multi-character character constant [-Wmultichar]
   case '90':
        ^~~~
/in/foo.cc:12:8: warning: multi-character character constant [-Wmultichar]
   case '45':
        ^~~~
/in/foo.cc:15:8: warning: multi-character character constant [-Wmultichar]
   case '40':
        ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:9:3: warning: case label value exceeds maximum value for type
   case '90':
   ^~~~
/in/foo.cc:12:3: warning: case label value exceeds maximum value for type
   case '45':
   ^~~~
/in/foo.cc:15:3: warning: case label value exceeds maximum value for type
   case '40':
   ^~~~