Question

尝试构建这个简单的程序后：

#include <iostream>
#include <cstdlib>

using namespace std;

void main()
{
    int a = 6;

    cout << a << endl;
}

我得到很多＆＃34;未解决的外部符号＆＃34;错误：

LNK1120 12 unresolved external errors
Severity    Code    Description Project File    Line    Suppression State
Error   LNK2019 unresolved external symbol strcat_s referenced in function "void __cdecl _RTC_StackFailure(void *,char const *)" (?_RTC_StackFailure@@YAXPEAXPEBD@Z)    CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_error_.obj)  1   
Error   LNK2019 unresolved external symbol strcpy_s referenced in function "void __cdecl _RTC_StackFailure(void *,char const *)" (?_RTC_StackFailure@@YAXPEAXPEBD@Z)    CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_error_.obj)  1   
Error   LNK2019 unresolved external symbol wcscpy_s referenced in function "int __cdecl GetPdbDllPathFromFilePath(wchar_t const *,wchar_t *,unsigned __int64)" (?GetPdbDllPathFromFilePath@@YAHPEB_WPEA_W_K@Z)  CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_pdblkup_.obj)    1   
Error   LNK2019 unresolved external symbol _CrtDbgReport referenced in function _CRT_RTC_INIT   CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_init_.obj)   1   
Error   LNK2019 unresolved external symbol _CrtDbgReportW referenced in function _CRT_RTC_INITW CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_init_.obj)   1   
Error   LNK2019 unresolved external symbol _wmakepath_s referenced in function "int __cdecl GetPdbDllPathFromFilePath(wchar_t const *,wchar_t *,unsigned __int64)" (?GetPdbDllPathFromFilePath@@YAHPEB_WPEA_W_K@Z)  CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_pdblkup_.obj)    1   
Error   LNK2019 unresolved external symbol _wsplitpath_s referenced in function "int __cdecl GetPdbDllPathFromFilePath(wchar_t const *,wchar_t *,unsigned __int64)" (?GetPdbDllPathFromFilePath@@YAHPEB_WPEA_W_K@Z) CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_pdblkup_.obj)    1   
Error   LNK2001 unresolved external symbol __C_specific_handler CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_error_.obj)  1   
Error   LNK2019 unresolved external symbol __stdio_common_vsprintf_s referenced in function _vsprintf_s_l   CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_error_.obj)  1   
Error   LNK2019 unresolved external symbol __vcrt_GetModuleFileNameW referenced in function "struct HINSTANCE__ * __cdecl GetPdbDll(void)" (?GetPdbDll@@YAPEAUHINSTANCE__@@XZ)  CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_pdblkup_.obj)    1   
Error   LNK2019 unresolved external symbol __vcrt_GetModuleHandleW referenced in function "struct HINSTANCE__ * __cdecl GetPdbDll(void)" (?GetPdbDll@@YAPEAUHINSTANCE__@@XZ)    CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_pdblkup_.obj)    1   
Error   LNK2019 unresolved external symbol __vcrt_LoadLibraryExW referenced in function "struct HINSTANCE__ * __cdecl GetPdbDll(void)" (?GetPdbDll@@YAPEAUHINSTANCE__@@XZ)  CPP C:Documents\VSCPP\CPP\CPP\MSVCRTD.lib(_pdblkup_.obj)    1

造成这种情况的原因以及如何解决这个问题？

Answer 1

Visual studio链接到iostream。您的视觉工作室有一些问题。但我现在可能正在修理它。

转到：C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.12.25827\include
找到iostream（如果你没有，请阅读下面的10页。）
用记事本打开iostream
在记事本中删除所有内容
把它放在记事本中：

// iostream standard header
#pragma once
#ifndef _IOSTREAM_
#define _IOSTREAM_
#ifndef RC_INVOKED
#include <istream>

 #pragma pack(push,_CRT_PACKING)
 #pragma warning(push,_STL_WARNING_LEVEL)
 #pragma warning(disable: _STL_DISABLED_WARNINGS)
 #pragma push_macro("new")
 #undef new
_STD_BEGIN
  #ifdef _M_CEE_PURE
__PURE_APPDOMAIN_GLOBAL extern istream cin, *_Ptr_cin;
__PURE_APPDOMAIN_GLOBAL extern ostream cout, *_Ptr_cout;
__PURE_APPDOMAIN_GLOBAL extern ostream cerr, *_Ptr_cerr;
__PURE_APPDOMAIN_GLOBAL extern ostream clog, *_Ptr_clog;

__PURE_APPDOMAIN_GLOBAL extern wistream wcin, *_Ptr_wcin;
__PURE_APPDOMAIN_GLOBAL extern wostream wcout, *_Ptr_wcout;
__PURE_APPDOMAIN_GLOBAL extern wostream wcerr, *_Ptr_wcerr;
__PURE_APPDOMAIN_GLOBAL extern wostream wclog, *_Ptr_wclog;

  #else /* _M_CEE_PURE */
        // OBJECTS
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT istream cin, *_Ptr_cin;
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT ostream cout, *_Ptr_cout;
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT ostream cerr, *_Ptr_cerr;
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT ostream clog, *_Ptr_clog;

__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT wistream wcin, *_Ptr_wcin;
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT wostream wcout, *_Ptr_wcout;
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT wostream wcerr, *_Ptr_wcerr;
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2_IMPORT wostream wclog, *_Ptr_wclog;

        // CLASS _Winit
class _CRTIMP2_PURE_IMPORT _Winit {
public:
    __thiscall _Winit();
    __thiscall ~_Winit() _NOEXCEPT;
private:
    __PURE_APPDOMAIN_GLOBAL static int _Init_cnt;
    };
  #endif /* _M_CEE_PURE */
_STD_END
 #pragma pop_macro("new")
 #pragma warning(pop)
 #pragma pack(pop)
#endif /* RC_INVOKED */
#endif /* _IOSTREAM_ */

/*
 * Copyright (c) by P.J. Plauger. All rights reserved.
 * Consult your license regarding permissions and restrictions.
V6.50:0009 */

保存。

如果你不喜欢iostream：

抱歉，我帮不了你。

我希望我帮助过你。

将iostream链接到Visual Studio 2017

1 个答案: