/in/foo.cc: In function 'int main()':
/in/foo.cc:12:31: error: 'a' was not declared in this scope
   12 |                         cout<<a;
      |                               ^
/in/foo.cc:15:20: error: 'a' was not declared in this scope
   15 |                 if(a>'Z')
      |                    ^