C++小程序崩溃_严重性代码说明项目文件行禁止显示状态 错误(活动)e0260缺少显式类型(假

#include <iostream>
using std::cin; using std::cout; using std::endl;
 
#include <string>
using std::string;
 
#include <cstddef>
using std::size_t;
 
int main()
{
	const string hexdigits = "0123456789ABCDEF";  // possible hex digits
 
	cout << "Enter a series of numbers between 0 and 15"
	     << " separated by spaces.  Hit ENTER when finished: " 
	     << endl;
	string result;        // will hold the resulting hexify'd string
 
	string::size_type n;  // hold numbers from the input
	while (cin >> n)
		if (n < hexdigits.size())    // ignore invalid input
			result += hexdigits[n];  // fetch the indicated hex digit
 
	cout << "Your hex number is: " << result << endl;
 
	return 0;
}

1. #include<cstddef>这个头文件和using std::size_t的作用，这里注释掉这两行没有出现warning和error。
2. 对于while(cin >> n)这个循环，文本写着键入回车结束。实际情况却是输入任何一个非int的输入结束。

在我自己的demo_code.cpp运行该程序又出现如下错误：

猜测可能性：1.某个库出现了问题2.宏定义出现错误

严重性	代码	说明	项目	文件	行	禁止显示状态
错误(活动)	E0020	未定义标识符 "_CoreCrtSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	88	
错误(活动)	E0337	链接规范与前面的 "_copysign" (已声明 所在行数:499，所属文件:"C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_math.h") 不兼容	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\float.h	308	
错误(活动)	E0337	链接规范与前面的 "_chgsign" (已声明 所在行数:497，所属文件:"C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_math.h") 不兼容	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\float.h	309	
错误(活动)	E0337	链接规范与前面的 "abort" (已声明 所在行数:56，所属文件:"C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stdlib.h") 不兼容	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_terminate.h	28	
错误(活动)	E0260	缺少显式类型(假定“int”)	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	333	
错误(活动)	E0077	此声明没有存储类或类型说明符	demo_code	D:\code\demo_code\demo_code.cpp	5	
错误(活动)	E0077	此声明没有存储类或类型说明符	demo_code	D:\code\demo_code\demo_code.cpp	33	
错误(活动)	E0655	此声明中不允许使用 "__inline" 修饰符	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	296	
错误(活动)	E0655	此声明中不允许使用 "__inline" 修饰符	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	711	
错误(活动)	E0655	此声明中不允许使用 "__inline" 修饰符	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\wchar.h	180	
错误(活动)	E0279	析构函数声明无效	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	334	
错误(活动)	E0145	未能初始化 变量 "_wfreopen_s"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	151	
错误(活动)	E0145	未能初始化 变量 "_wfopen_s"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	136	
错误(活动)	E0145	未能初始化 变量 "_getwc_nolock"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	232	
错误(活动)	E0145	未能初始化 变量 "_fgetwc_nolock"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	221	
错误(活动)	E0145	未能初始化 变量 "getwc"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	66	
错误(活动)	E0020	未定义标识符 "_Stream"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	67	
错误(活动)	E0020	未定义标识符 "_Stream"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	137	
错误(活动)	E0020	未定义标识符 "_Stream"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	152	
错误(活动)	E0020	未定义标识符 "_Stream"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	222	
错误(活动)	E0020	未定义标识符 "_Stream"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	233	
错误(活动)	E0020	未定义标识符 "_OldStream"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	155	
错误(活动)	E0020	未定义标识符 "_Mode"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	139	
错误(活动)	E0020	未定义标识符 "_Mode"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	154	
错误(活动)	E0020	未定义标识符 "_ino_t"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\sys\types.h	18	
错误(活动)	E0020	未定义标识符 "_HFILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	650	
错误(活动)	E0020	未定义标识符 "_HFILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	652	
错误(活动)	E0020	未定义标识符 "_FileName"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	138	
错误(活动)	E0020	未定义标识符 "_FileName"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	153	
错误(活动)	E0020	未定义标识符 "_F"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\wchar.h	181	
错误(活动)	E0020	未定义标识符 "_CRT_REPORT_HOOK"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	664	
错误(活动)	E0020	未定义标识符 "_CRT_REPORT_HOOK"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	669	
错误(活动)	E0020	未定义标识符 "_CRT_REPORT_HOOK"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	670	
错误(活动)	E0020	未定义标识符 "_CRT_REPORT_HOOK"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	675	
错误(活动)	E0020	未定义标识符 "_CoreCrtSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	69	
错误(活动)	E0020	未定义标识符 "_CoreCrtNonSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	53	
错误(活动)	E0020	未定义标识符 "_CoreCrtNonSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	60	
错误(活动)	E0020	未定义标识符 "_CoreCrtNonSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	79	
错误(活动)	E0020	未定义标识符 "_CoreCrtNonSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	98	
错误(活动)	E0020	未定义标识符 "_CoreCrtNonSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	196	
错误(活动)	E0020	未定义标识符 "_CoreCrtNonSecureSearchSortCompareFunction"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	205	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	274	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	283	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	292	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1020	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1032	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1043	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1053	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1078	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1099	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1109	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1126	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1488	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1497	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1840	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1867	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1898	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1907	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1924	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1940	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	1959	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	631	
错误(活动)	E0020	未定义标识符 "va_list"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	641	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\atomic	2014	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\system_error	105	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\system_error	107	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\system_error	109	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime.h	345	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime.h	353	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt.h	274	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt.h	287	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stddef.h	53	
错误(活动)	E0020	未定义标识符 "uintptr_t"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stdlib.h	163	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\exception	397	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xmemory	722	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xmemory	841	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xmemory	842	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xstring	691	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xstring	736	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xstring	781	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xstring	843	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	5090	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	5090	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	5095	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	5095	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	5101	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	5107	
错误(活动)	E0020	未定义标识符 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	5142	
错误(活动)	E0020	未定义标识符 "string"	demo_code	D:\code\demo_code\demo_code.cpp	16	
错误(活动)	E0020	未定义标识符 "string"	demo_code	D:\code\demo_code\demo_code.cpp	21	
错误(活动)	E0020	未定义标识符 "nothrow_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xlocale	72	
错误(活动)	E0020	未定义标识符 "nothrow_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xlocale	80	
错误(活动)	E0020	未定义标识符 "n"	demo_code	D:\code\demo_code\demo_code.cpp	24	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	58	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	67	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	79	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	85	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	104	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	120	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	124	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	130	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	137	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	144	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	147	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	152	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	155	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	159	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	172	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	222	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	228	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	233	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	239	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	245	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	271	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	280	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	289	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	297	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	712	
错误(活动)	E0020	未定义标识符 "FILE"	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\wchar.h	181	
错误(活动)	E0020	未定义标识符 "endl"	demo_code	D:\code\demo_code\demo_code.cpp	20	
错误(活动)	E0020	未定义标识符 "cout"	demo_code	D:\code\demo_code\demo_code.cpp	18	
错误(活动)	E0020	未定义标识符 "cin"	demo_code	D:\code\demo_code\demo_code.cpp	24	
错误(活动)	E0029	应输入表达式	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	342	
错误(活动)	E0029	应输入表达式	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	343	
错误(活动)	E0040	应输入标识符	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\ostream	36	
错误(活动)	E0110	应输入定义或标记名	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\system_error	109	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cmath	877	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cstdlib	84	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vadefs.h	167	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vadefs.h	196	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vadefs.h	197	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime.h	361	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime_new.h	44	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime_new.h	198	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime_new_debug.h	61	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xtr1common	244	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	340	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	345	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	349	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	351	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	484	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt.h	2011	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_malloc.h	228	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_math.h	994	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_search.h	212	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdlib.h	479	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\crtdbg.h	809	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stddef.h	57	
错误(活动)	E0169	应输入声明	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stdlib.h	1366	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\ostream	36	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\sal.h	2361	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\system_error	109	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xlocale	267	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	342	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	343	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	305	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	720	
错误(活动)	E0065	应输入“;”	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\wchar.h	184	
错误(活动)	E0065	应输入“;”	demo_code	D:\code\demo_code\demo_code.cpp	14	
错误(活动)	E0065	应输入“;”	demo_code	D:\code\demo_code\demo_code.cpp	23	
错误(活动)	E0018	应输入“)”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\ostream	36	
错误(活动)	E0018	应输入“)”	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	297	
错误(活动)	E0018	应输入“)”	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	712	
错误(活动)	E0018	应输入“)”	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\wchar.h	182	
错误(活动)	E0147	声明与 "void __cdecl _Lockit_dtor(int)" (已声明 所在行数:338) 不兼容	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	343	
错误(活动)	E0147	声明与 "void __cdecl _Lockit_ctor(int)" (已声明 所在行数:337) 不兼容	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	342	
错误(活动)	E0276	后面有“::”的名称一定是类名或命名空间名	demo_code	D:\code\demo_code\demo_code.cpp	23	
错误(活动)	E0757	函数 "_Lockit" 不是类型名	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xlocinfo	301	
错误(活动)	E0757	函数 "_Lockit" 不是类型名	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	347	
错误(活动)	E0757	函数 "_Lockit" 不是类型名	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	347	
错误(活动)	E0282	全局范围没有 "wscanf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	59	
错误(活动)	E0282	全局范围没有 "wprintf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	58	
错误(活动)	E0282	全局范围没有 "wmemset"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	85	
错误(活动)	E0282	全局范围没有 "wmemmove"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	84	
错误(活动)	E0282	全局范围没有 "wmemcpy"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	83	
错误(活动)	E0282	全局范围没有 "wmemcmp"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	82	
错误(活动)	E0282	全局范围没有 "wmemchr"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	81	
错误(活动)	E0282	全局范围没有 "wcsxfrm"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	79	
错误(活动)	E0282	全局范围没有 "wcstok"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	78	
错误(活动)	E0282	全局范围没有 "wcsstr"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	77	
错误(活动)	E0282	全局范围没有 "wcsspn"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	74	
错误(活动)	E0282	全局范围没有 "wcsrchr"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	73	
错误(活动)	E0282	全局范围没有 "wcspbrk"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	72	
错误(活动)	E0282	全局范围没有 "wcsncpy"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	71	
错误(活动)	E0282	全局范围没有 "wcsncmp"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	70	
错误(活动)	E0282	全局范围没有 "wcsncat"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	69	
错误(活动)	E0282	全局范围没有 "wcslen"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	68	
错误(活动)	E0282	全局范围没有 "wcsftime"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	86	
错误(活动)	E0282	全局范围没有 "wcscspn"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	67	
错误(活动)	E0282	全局范围没有 "wcscpy"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	66	
错误(活动)	E0282	全局范围没有 "wcscoll"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	65	
错误(活动)	E0282	全局范围没有 "wcscmp"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	64	
错误(活动)	E0282	全局范围没有 "wcschr"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	63	
错误(活动)	E0282	全局范围没有 "wcscat"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	62	
错误(活动)	E0282	全局范围没有 "vwscanf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	90	
错误(活动)	E0282	全局范围没有 "vwprintf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	56	
错误(活动)	E0282	全局范围没有 "vfwscanf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	88	
错误(活动)	E0282	全局范围没有 "vfwprintf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	54	
错误(活动)	E0282	全局范围没有 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cstdint	52	
错误(活动)	E0282	全局范围没有 "uintptr_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cstdint	86	
错误(活动)	E0282	全局范围没有 "tm"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	32	
错误(活动)	E0282	全局范围没有 "swscanf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	52	
错误(活动)	E0282	全局范围没有 "mbsinit"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	48	
错误(活动)	E0282	全局范围没有 "fwscanf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	42	
错误(活动)	E0282	全局范围没有 "fwprintf"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	41	
错误(活动)	E0282	全局范围没有 "fgetwc"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\cwchar	36	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	342	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	138	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	139	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	153	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	154	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	297	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\corecrt_wstdio.h	712	
错误(活动)	E0254	不允许使用类型名	demo_code	C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\wchar.h	182	
错误(活动)	E0070	不允许使用不完整的类型	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\istream	47	
错误(活动)	E0070	不允许使用不完整的类型	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\ostream	36	
错误(活动)	E0070	不允许使用不完整的类型	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\streambuf	29	
错误(活动)	E0070	不允许使用不完整的类型	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xlocale	265	
错误(活动)	E0771	不允许使用“explicit”	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	333	
错误(活动)	E0341	“operator=”必须是成员函数	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	347	
错误(活动)	E1447	__thiscall 只能出现在非静态成员函数声明中	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\yvals.h	333	
错误(活动)	E0135	namespace "std" 没有成员 "true_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2357	
错误(活动)	E0135	namespace "std" 没有成员 "remove_volatile"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2356	
错误(活动)	E0135	namespace "std" 没有成员 "remove_reference"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2355	
错误(活动)	E0135	namespace "std" 没有成员 "remove_cv"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2352	
错误(活动)	E0135	namespace "std" 没有成员 "remove_const"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2351	
错误(活动)	E0135	namespace "std" 没有成员 "nothrow_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime_new.h	55	
错误(活动)	E0135	namespace "std" 没有成员 "nothrow_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime_new.h	66	
错误(活动)	E0135	namespace "std" 没有成员 "nothrow_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime_new.h	75	
错误(活动)	E0135	namespace "std" 没有成员 "nothrow_t"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\vcruntime_new.h	84	
错误(活动)	E0135	namespace "std" 没有成员 "is_same"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2340	
错误(活动)	E0135	namespace "std" 没有成员 "is_integral"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2331	
错误(活动)	E0135	namespace "std" 没有成员 "is_floating_point"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2328	
错误(活动)	E0135	namespace "std" 没有成员 "is_arithmetic"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2319	
错误(活动)	E0135	namespace "std" 没有成员 "integral_constant"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2317	
错误(活动)	E0135	namespace "std" 没有成员 "false_type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2315	
错误(活动)	E0135	namespace "std" 没有成员 "enable_if"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2313	
错误(活动)	E0135	namespace "std" 没有成员 "conditional"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits	2311	
错误(活动)	E0864	integral_constant 不是模板	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\utility	513	
错误(活动)	E0864	integral_constant 不是模板	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\utility	518	
错误(活动)	E0135	class "is_same<char, char>" 没有成员 "value"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xtr1common	166	
错误(活动)	E0135	class "enable_if<<error-constant>, void>" 没有成员 "type"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xtr1common	54	
错误(活动)	E0135	class "disjunction<is_same<char, char>, is_same<char, wchar_t>, is_same<char, unsigned short>>" 没有成员 "value"	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xtr1common	171	
错误(活动)	E0864	bool_constant 不是模板	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xtr1common	42	
错误(活动)	E0864	bool_constant 不是模板	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xtr1common	84	
错误(活动)	E0864	bool_constant 不是模板	demo_code	C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\xutility	52	

 
#define	DEMO
#ifdef DEMO
 
​
 
 
 
 
#endif//DEMO
//当文件头部加入这个宏定义时，出现奇怪错误，可能是因为某个重要的库里也定义了一个同样的宏

更改宏定义DEMOW为之后依旧如此

但是注释掉之后，问题消失

奇怪的是，似乎不是库里有一个同样的宏，因为定义不同的宏，只要在开头定义都会出现这样子的奇怪状况

玄学，上面同样的代码，删掉重新再写一遍，结果就不一样了，很奇怪

//#define	DEMOW
#ifdef DEMOW
 
​
 
 
 
 
#endif//DEMOW
#define DEMOW
#ifdef DEMOW
 
#endif // DEMOW
 
//#define	DEMOW
#ifdef DEMOW
 
​
 
 
 
 
#endif//DEMOW