C语言 const char* 类型的参数与“LPCWSTR”类型的参数不兼容
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argument of type const char* is incompatible with parameter of type "LPCWSTR"
提问by
I am trying to make a simple Message Box in C in Visual Studio 2012, but I am getting the following error messages
我正在尝试在 Visual Studio 2012 中用 C 语言制作一个简单的消息框，但我收到以下错误消息
argument of type const char* is incompatible with parameter of type "LPCWSTR"
err LNK2019:unresolved external symbol_main referenced in function_tmainCRTStartup
Here is the source code
这是源代码
#include<Windows.h>
int _stdcall WinMain(HINSTANCE hinstance,HINSTANCE hPrevinstance,LPSTR lpszCmdline,int nCmdShow)
{
MessageBox(0,"Hello","Title",0);
return(0);
}
Please Help
请帮忙
Thanks and Regards
感谢致敬
回答by cup
To make your code compile in both modes, enclose the strings in _T() and use the TCHAR equivalents
要使您的代码在两种模式下都可以编译，请将字符串括在 _T() 中并使用 TCHAR 等效项
#include <tchar.h>
#include <windows.h>
int WINAPI _tWinMain(HINSTANCE hinstance, HINSTANCE hPrevinstance, LPTSTR lpszCmdLine, int nCmdShow)
{
MessageBox(0,_T("Hello"),_T("Title"),0);
return 0;
}
回答by Jasurbek Nabijonov
To compile your code in Visual C++ you need to use Multi-Byte char WinAPI functions instead of Wide char ones.
要在 Visual C++ 中编译代码，您需要使用多字节字符 WinAPI 函数而不是宽字符函数。
Set Project -> Properties -> General -> Character Set option to Use Multi-Byte Character Set
设置项目 -> 属性 -> 常规 -> 字符集选项以使用多字节字符集
I found it here https://stackoverflow.com/a/33001454/5646315
回答by mkchandler
I recently ran in to this issue and did some research and thought I would document some of what I found here.
我最近遇到了这个问题并做了一些研究，并认为我会记录我在这里找到的一些内容。
To start, when calling MessageBox(...), you are really just calling a macro (for backwards compatibility reasons) that is calling either MessageBoxA(...)for ANSI encoding or MessageBoxW(...)for Unicode encoding.
首先，在调用 时MessageBox(...)，您实际上只是调用一个宏（出于向后兼容性的原因），该宏MessageBoxA(...)为 ANSI 编码或MessageBoxW(...)Unicode 编码调用。
So if you are going to pass in an ANSI string with the default compiler setup in Visual Studio, you can call MessageBoxA(...)instead:
因此，如果您要在 Visual Studio 中使用默认编译器设置传递 ANSI 字符串，则可以MessageBoxA(...)改为调用：
#include<Windows.h>
int _stdcall WinMain(HINSTANCE hinstance,HINSTANCE hPrevinstance,LPSTR lpszCmdline,int nCmdShow)
{
MessageBoxA(0,"Hello","Title",0);
return(0);
}
Full documentation for MessageBox(...)is located here: https://msdn.microsoft.com/en-us/library/windows/desktop/ms645505(v=vs.85).aspx
完整文档MessageBox(...)位于此处：https: //msdn.microsoft.com/en-us/library/windows/desktop/ms645505(v=vs.85).aspx
And to expand on what @cup said in their answer, you could use the _T()macro and continue to use MessageBox():
为了扩展@cup 在他们的回答中所说的内容，您可以使用_T()宏并继续使用MessageBox()：
#include<tchar.h>
#include<Windows.h>
int _stdcall WinMain(HINSTANCE hinstance,HINSTANCE hPrevinstance,LPSTR lpszCmdline,int nCmdShow)
{
MessageBox(0,_T("Hello"),_T("Title"),0);
return(0);
}
The _T()macro is making the string "character set neutral". You could use this to setup all strings as Unicode by defining the symbol _UNICODEbefore you build (documentation).
该_T()宏使得字符串“字符集中性”。您可以使用它通过_UNICODE在构建之前定义符号来将所有字符串设置为 Unicode （文档）。
Hope this information will help you and anyone else encountering this issue.
希望这些信息对您和其他遇到此问题的人有所帮助。
