当我尝试编译任何C ++程序时，出现以下错误：
In file included from /usr/local/include/c++/7.1.0/bits/postypes.h:40:0, from /usr/local/include/c++/7.1.0/iosfwd:40, from /usr/local/include/c++/7.1.0/ios:38, from /usr/local/include/c++/7.1.0/ostream:38, from /usr/local/include/c++/7.1.0/iostream:39, from main.cpp:2: /usr/local/include/c++/7.1.0/cwchar:44:10: fatal error: wchar.h: No such file or directory #include <wchar.h> ^~~~~~~~~ compilation terminated.
自从我将macBook更新到Mojave 10.14版以来，这是我第一次编写C ++，