/in/foo.cc: In function 'int main()':
/in/foo.cc:18:15: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   18 |         cout<<c;
      |               ^
/in/foo.cc:5:21: note: 'c' was declared here
    5 |         int a=1,b=1,c,k;
      |                     ^