/in/foo.cc: In function 'int main()':
/in/foo.cc:7:9: error: expected unqualified-id before 'char'
    7 |         char a, b, c;
      |         ^~~~
/in/foo.cc:8:16: error: 'a' was not declared in this scope
    8 |         cin >> a >> b >> c;
      |                ^
/in/foo.cc:8:21: error: 'b' was not declared in this scope
    8 |         cin >> a >> b >> c;
      |                     ^
/in/foo.cc:8:26: error: 'c' was not declared in this scope
    8 |         cin >> a >> b >> c;
      |                          ^