/in/foo.cc: In function 'int main()':
/in/foo.cc:20:12: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   20 |         res=c/k;
      |         ~~~^~~~
/in/foo.cc:5:17: note: 'c' was declared here
    5 |         int a,b,c,i,n,res,k;
      |                 ^
/in/foo.cc:20:12: warning: 'k' may be used uninitialized [-Wmaybe-uninitialized]
   20 |         res=c/k;
      |         ~~~^~~~
/in/foo.cc:5:27: note: 'k' was declared here
    5 |         int a,b,c,i,n,res,k;
      |                           ^