C/C++ Compile Run插件，使用某些头文件出现重定义的错误，解决方法为修改MinGW的路径
运行代码
#include
using namespace std;
//#include ///消息框 ///单独用，可以
#include ///文件路径 ///单独用，不可以
#include ///文件路径 ///单独用，不可以
#include ///单独用，不可以
int main()
{
// cout<<"ok"< 出现错误：
使用某些头文件，出现重定义的错误
[some_h_file_test_1.cpp 2022-02-21 03:09:36.131]
,,In file included from some_h_file_test_1.cpp:26:
c:\\software\\mingw\\include\\io.h:342:8: error: redefinition of 'struct _wfinddata_t'
342 | struct _wfinddata_t __struct_finddata_t (time_t, _fsize_t);
| ^~~~~~~~~~~~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\cwchar:44,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\bits\\postypes.h:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iosfwd:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ios:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ostream:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iostream:39,
from some_h_file_test_1.cpp:21:
c:\\software\\mingw\\include\\wchar.h:348:8: note: previous definition of 'struct _wfinddata_t'
348 | struct _wfinddata_t {
| ^~~~~~~~~~~~
In file included from some_h_file_test_1.cpp:26:
c:\\software\\mingw\\include\\io.h:343:8: error: redefinition of 'struct _wfinddatai64_t'
343 | struct _wfinddatai64_t __struct_finddata_t (time_t, __int64);
| ^~~~~~~~~~~~~~~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\cwchar:44,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\bits\\postypes.h:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iosfwd:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ios:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ostream:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iostream:39,
from some_h_file_test_1.cpp:21:
c:\\software\\mingw\\include\\wchar.h:356:8: note: previous definition of 'struct _wfinddatai64_t'
356 | struct _wfinddatai64_t {
| ^~~~~~~~~~~~~~~
In file included from some_h_file_test_1.cpp:26:
c:\\software\\mingw\\include\\io.h:352:10: error: conflicting declaration of C function 'intptr_t _wfindfirst(const wchar_t*, _wfinddata_t*)'
352 | intptr_t _wfindfirst (const wchar_t *, struct _wfinddata_t *);
| ^~~~~~~~~~~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\cwchar:44,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\bits\\postypes.h:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iosfwd:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ios:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ostream:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iostream:39,
from some_h_file_test_1.cpp:21:
c:\\software\\mingw\\include\\wchar.h:417:38: note: previous declaration 'long int _wfindfirst(const wchar_t*, _wfinddata_t*)'
417 | _CRTIMP long __cdecl __MINGW_NOTHROW _wfindfirst (const wchar_t*, struct _wfinddata_t *);
| ^~~~~~~~~~~
In file included from some_h_file_test_1.cpp:26:
c:\\software\\mingw\\include\\io.h:355:5: error: conflicting declaration of C function 'int _wfindnext(intptr_t, _wfinddata_t*)'
355 | int _wfindnext (intptr_t, struct _wfinddata_t *);
| ^~~~~~~~~~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\cwchar:44,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\bits\\postypes.h:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iosfwd:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ios:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ostream:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iostream:39,
from some_h_file_test_1.cpp:21:
c:\\software\\mingw\\include\\wchar.h:418:37: note: previous declaration 'int _wfindnext(long int, _wfinddata_t*)'
418 | _CRTIMP int __cdecl __MINGW_NOTHROW _wfindnext (long, struct _wfinddata_t *);
| ^~~~~~~~~~
In file included from some_h_file_test_1.cpp:26:
c:\\software\\mingw\\include\\io.h:358:10: error: conflicting declaration of C function 'intptr_t _wfindfirsti64(const wchar_t*, _wfinddatai64_t*)'
358 | intptr_t _wfindfirsti64 (const wchar_t *, struct _wfinddatai64_t *);
| ^~~~~~~~~~~~~~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\cwchar:44,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\bits\\postypes.h:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iosfwd:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ios:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ostream:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iostream:39,
from some_h_file_test_1.cpp:21:
c:\\software\\mingw\\include\\wchar.h:425:38: note: previous declaration 'long int _wfindfirsti64(const wchar_t*, _wfinddatai64_t*)'
425 | _CRTIMP long __cdecl __MINGW_NOTHROW _wfindfirsti64 (const wchar_t*, struct _wfinddatai64_t*);
| ^~~~~~~~~~~~~~
In file included from some_h_file_test_1.cpp:26:
c:\\software\\mingw\\include\\io.h:361:5: error: conflicting declaration of C function 'int _wfindnexti64(intptr_t, _wfinddatai64_t*)'
361 | int _wfindnexti64 (intptr_t, struct _wfinddatai64_t *);
| ^~~~~~~~~~~~~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\cwchar:44,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\bits\\postypes.h:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iosfwd:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ios:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ostream:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iostream:39,
from some_h_file_test_1.cpp:21:
c:\\software\\mingw\\include\\wchar.h:426:38: note: previous declaration 'int _wfindnexti64(long int, _wfinddatai64_t*)'
426 | _CRTIMP int __cdecl __MINGW_NOTHROW _wfindnexti64 (long, struct _wfinddatai64_t*);
| ^~~~~~~~~~~~~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ctime:42,
from some_h_file_test_1.cpp:28:
c:\\software\\mingw\\include\\time.h:185:8: error: redefinition of 'struct tm'
185 | struct tm
| ^~
In file included from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\cwchar:44,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\bits\\postypes.h:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iosfwd:40,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ios:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\ostream:38,
from c:\\software\\mingw\\lib\\gcc\\mingw32\\9.2.0\\include\\c++\\iostream:39,
from some_h_file_test_1.cpp:21:
c:\\software\\mingw\\include\\wchar.h:87:8: note: previous definition of 'struct tm'
87 | struct tm {
| ^~
我的解决之旅如下：
-
先去GitHub ”C/C++ Compile Run”看一下有没有问过这个问题，搜索”io.h”、”wchar.h”、”header”、”_wfinddata_t”。结果是没有人问过
-
google搜索”io.h redefinition of 'struct _wfinddata_t’”（无结果）、”io.h wchar.h _wfinddata_t”（无结果）、”c++ 头文件 重定义”（无结果）、”mingw 重定义”（有点启发，可能与MinGW有关系）
-
针对错误，去看一下代码，在”io.h”和”wchar.h”找到了struct _wfinddata_t。问题出在了”io.h”使用没有使用ifndef，而”wchar.h”使用了“ifndef WFINDDATA_T_DEFINED”，所以产生重定义
-
对于重定义，感觉很好奇，感觉按道理应该不会发生这样的错误，而且文件还是2020年的。但是google搜索没搜索到对应的询问。在其它的搜索中，大致了解到可能会有重定义的问题。
-
之前VSCode是用launch.json等配置的，运行没问题。现在用CodeBlocks尝试，结果也是没问题。看了一下CodeBlocks对应的MinGW，再对应看了”io.h”和”mingw”文件，发现它们都有”#ifndef WFINDDATAT_DEFINED”，所以没有重定义。
-
寻找VSCode C/C++ Compile Run 下是使用哪个MinGW，发现有配置选项， “ C-cpp-compile-run: C-compiler The C compiler path (e.g: /usr/bin/gcc or C:\MinGW\bin\gcc.exe)“和”C-cpp-compile-run: Cpp-compiler”，把对应的路径修改为我在CodeBlocks使用的MinGW的路径，就没问题了。