/in/foo.cc: In function 'int main()':
/in/foo.cc:9:17: error: 't' was not declared in this scope
    9 |                 t = n, l = 0;
      |                 ^
/in/foo.cc:9:24: error: 'l' was not declared in this scope
    9 |                 t = n, l = 0;
      |                        ^
/in/foo.cc:14:17: error: 'sum' was not declared in this scope
   14 |                 sum = 0;
      |                 ^~~