foo.cc: In function 'int main()':
foo.cc:25:1: error: expected primary-expression before '=' token
 =
 ^
foo.cc: At global scope:
foo.cc:43:1: error: expected unqualified-id before '=' token
 =
 ^

自豪的采用 HydroJudger 进行评测(github.com/hydro-dev/HydroJudger)