C++Build 这几个错误是什么意思

C++Build 这几个错误是什么意思
Build [C++ Error] Unit3.cpp(101): E2238 Multiple declaration for 'an1' [C++ Error] Unit3.cpp(89): E2344 Earlier declaration of 'an1' [C++ Error] Unit3.cpp(128): E2206 Illegal character ',' (0xa3ac) [C++ Error] Unit3.cpp(128): E2121 Function call missing ) [C++ Error] Unit3.cpp(128): E2206 Illegal character '；' (0xa3bb) [C++ Error] Unit3.cpp(141): E2379 Statement missing ;