/in/foo.cc:44:1: error: expected ';' after struct definition
 }
 ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:59:2: error: 'a' was not declared in this scope
  a.len = strlen(s1);
  ^
/in/foo.cc:60:2: error: 'b' was not declared in this scope
  b.len = strlen(s2);
  ^
/in/foo.cc:95:1: error: expected '}' at end of input
 }
 ^