/in/foo.cc: In function 'int main()':
/in/foo.cc:7:11: warning: statement has no effect [-Wunused-value]
    7 |         t == 0;
      |         ~~^~~~
/in/foo.cc:16:17: warning: 't' may be used uninitialized [-Wmaybe-uninitialized]
   16 |         cout << t;
      |                 ^
/in/foo.cc:6:17: note: 't' was declared here
    6 |         int a,b,t;
      |                 ^