Ubuntu 为什么编译时此内置类型出错？

操作系统：

ubuntu18.04

GCC:

7.5.0

---

我认为wchar\u t是一种性病类型。。。所以，也许我需要更新gcc？

之类的东西，结果是我的头

wctype wchar.h

被损坏了。通过重新安装

libc6-dev

、

GCC

和

G++

修复

#include <stdio.h>
#include <wctype.h>
int main ()
{
  wchar_t c;

  return 0;
}

In file included from /usr/include/wctype.h:38:0,
                 from main.cpp:2:
/usr/include/x86_64-linux-gnu/bits/wctype-wchar.h:3:12: error: stray ‘`’ in program
    none of `iswcntrl', `iswdigit', `iswpunct', or `iswspace' is true.  */
            ^
/usr/include/x86_64-linux-gnu/bits/wctype-wchar.h:3:36: error: stray ‘`’ in program
    none of `iswcntrl', `iswdigit', `iswpunct', or `iswspace' is true.  */
                                    ^
/usr/include/x86_64-linux-gnu/bits/wctype-wchar.h:60:2: error: #endif without #if
 #endif /* bits/wctype-wchar.h.  */