/in/foo.cc: In function 'char get()':
/in/foo.cc:22:16: warning: 'c' is used uninitialized [-Wuninitialized]
   22 | while (!isalpha(c))
      |         ~~~~~~~^~~
/in/foo.cc:21:6: note: 'c' was declared here
   21 | char c;
      |      ^