/in/foo.cc: In function 'int main()':
/in/foo.cc:6:17: warning: 'a' is used uninitialized [-Wuninitialized]
    6 |         cout<<a+b;
      |                 ^
/in/foo.cc:5:13: note: 'a' was declared here
    5 |         int a,b;
      |             ^
/in/foo.cc:6:17: warning: 'b' is used uninitialized [-Wuninitialized]
    6 |         cout<<a+b;
      |                 ^
/in/foo.cc:5:15: note: 'b' was declared here
    5 |         int a,b;
      |               ^