/in/foo.cc: In function 'int main()':
/in/foo.cc:5:17: warning: 'a' is used uninitialized [-Wuninitialized]
    5 |     cout << a + b << endl;
      |                 ^
/in/foo.cc:4:9: note: 'a' was declared here
    4 |     int a, b;
      |         ^
/in/foo.cc:5:17: warning: 'b' is used uninitialized [-Wuninitialized]
    5 |     cout << a + b << endl;
      |                 ^
/in/foo.cc:4:12: note: 'b' was declared here
    4 |     int a, b;
      |            ^