/in/foo.cc: In function 'int main()':
/in/foo.cc:13:15: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   13 |         printf("%.2f",c);
      |         ~~~~~~^~~~~~~~~~
/in/foo.cc:4:20: note: 'c' was declared here
    4 |         double k,f,c;
      |                    ^
/in/foo.cc:15:15: warning: 'f' may be used uninitialized [-Wmaybe-uninitialized]
   15 |         printf("%.2f",f);
      |         ~~~~~~^~~~~~~~~~
/in/foo.cc:4:18: note: 'f' was declared here
    4 |         double k,f,c;
      |                  ^