error:expected unqualified-id before '{' token

error:expected unqualified-id before '{' token types.h:31:error:expected unqualified-id before '}' token expected ")" before ";" token expected ';' before‘)’token是什么意思 expected `while' before '}' token什么意思? - Syntax error on token ",",< expected - This method has a c Syntax error on token ";",Expression expected after this tok expected declaration specifiers or ‘...’ before ‘(’ token 这句 java代码中的fileName报Syntax error on token ";",{ expected after expected declaration 'befor'}'token是什么意思 token Syntax error on token(s),misplaced construct(s) 什么错误?