/in/foo.cc: In function 'int main()':
/in/foo.cc:31:10: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   31 |         x=c/f;
      |         ~^~~~
/in/foo.cc:9:17: note: 'c' was declared here
    9 |         int a,b,c;
      |                 ^