/in/foo.cc: In function 'int main()':
/in/foo.cc:9:17: warning: 'a' is used uninitialized [-Wuninitialized]
    9 |         cout<<a+b<<endl;
      |                 ^
/in/foo.cc:7:19: note: 'a' was declared here
    7 |         long long a,b;
      |                   ^
/in/foo.cc:9:17: warning: 'b' is used uninitialized [-Wuninitialized]
    9 |         cout<<a+b<<endl;
      |                 ^
/in/foo.cc:7:21: note: 'b' was declared here
    7 |         long long a,b;
      |                     ^