使用sprintf格式化字符串并在MessageBox中显示它！ [英] Formating a string using sprintf and showing it in MessageBox!
问题描述
大家好
我想格式化一个字符串（使用sprintf）并把它放在一个消息框中
但是我尝试这样做，它不会似乎工作。
以下是我尝试做的示例示例：
char msg [120];
string my_name =" John";
sprintf（msg，我的名字是：％s"，my_name）;
MessageBox（NULL， msg，NULL，MB_OK）;
这是我得到的错误：
错误C2664：''MessageBoxW''：无法从'转换参数2' 'char
[120]''''const unsigned short *''
指向的类型不相关;转换需要reinterpret_cast，
C风格的演员或函数风格的演员
我知道MessageBox想要一个LPCTSTR作为它的第二个参数。如果我用
代替（见下文）...
LPCTSTR msg;
string my_name =" John" ;
sprintf（msg，我的名字是：％s，my_name）;
MessageBox（NULL，msg，NULL，MB_OK）;
....我收到以下错误：
错误C2664：''sprintf''：无法从''const
unsigned short *''to''char *''
指向的类型不相关;转换需要reinterpret_cast，
C风格的演员或功能风格的演员
好像我尝试使用sprintf或者MessageBox不是
开心。如果我尝试在sprintf或MessageBox中投射''msg''我只是将b $ b得到垃圾作为我的输出。
有没有人有一个建议如何解决这个问题？请注意我
不想使用CString，因为我的平台似乎不支持
。我如何能够解决这个问题的示例代码将非常值得赞赏。
非常感谢您的帮助。
/ Babak
嗨babak！我想格式化一个字符串（使用sprintf）并放入它在消息框中
但是我尝试这样做，它似乎无法工作。
以下是我尝试做的示例示例：
char msg [120];
string my_name =" John";
sprintf（msg，我的名字是：％s"，my_name）;
MessageBox（NULL ，msg，NULL，MB_OK）;
这是我得到的错误：
错误C2664：''MessageBoxW''：无法从''char <转换参数2 br /> [120]'''''const unsigned short *''
你编译一个UNICODE程序但是你正在处理ANSI字符串...
更改为
< code>
ifdef _UNIC ODE
#define tstring std :: wstring
#else
#define tstring std :: string
＃ endif
TCHAR消息[120];
tstring my_name = _T（" John"）;
__stprintf（msg， _T（我的名字是：％s），（LPCTSTR）my_name）;
MessageBox（NULL，msg，NULL，MB_OK）;
< /代码>
-
问候
Jochen
我关于Win32的博客和.NET
http://blog.kalmbachnet.de/
>错误C2664：''MessageBoxW''：无法将参数2从''char[120]''转换为''const unsigned short *''
指向的类型不相关;转换需要reinterpret_cast，C风格的转换或函数式转换
看起来应用程序是Unicode。
LPCTSTR消息;
字符串my_name =" John" ; sprintf（msg，我的名字是：％s，my_name）;
MessageBox（NULL，msg，NULL，MB_OK）;
什么是字符串 ？
无论如何，试试：
TCHAR消息[120];
TCHAR * my_name = _T（" John"） ;
_stprintf（msg，_T（"我的名字是：％s"），my_name）;
MessageBox（NULL，msg，NULL， MB_OK）;
注：
----------------
LPCTSTR msg;
会使你的应用程序崩溃，因为它是一个非初始化的指针。
它扩展为
LPCTSTR：
LP =长指针（长期已经过时，从过去的时候起，
英特尔处理器使用分段存储器）
C = const
T =通用文本类型
STR =字符串
因此，这变为：
如果非Unicode：const char * msg;
如果是Unicode：const wchar_t * msg;
Generic：const TCHAR * msg;
------------- ---
注意_stprintf insted sprintf和_T（.....）
如果你读了sprintf的文档，你会看到一个表名为
" Generic-Text Rout ine映射。 TCHAR.H例程是你想要的b $ b。
----------------
了解一下Generic-Text Routine Mappings和Generic-Text Routine Mappings在MSDN。
----------------
阅读这篇文章： http://www.mihainita.net/20050306b.shtml
请注意我不知道我想使用CString，因为我的平台似乎不支持。
CString是MFC（VC.NET中的MFC / ATL）的一部分。如果您将
项目配置为使用MFC，那么您将获得它。
-
Mihai Nita [Microsoft MVP ，Windows - SDK]
------------------------------------- -----
将_year_替换为_以获取真实的电子邮件
>< code>ifdef _UNICODE
#define tstring std :: wstring
#else
#define tstring std :: string
#endif
TCHAR消息[120] ;
tstring my_name = _T（" John"）;
__stprintf（msg，_T（"我的名字是：％s"），（LPCTSTR）my_name）;
MessageBox（ NULL，msg，NULL，MB_OK）;
< / code>
我没想到std :: string :-)
Jochen是对的，这就是你应该做的。
但他在__stprintf的双下划线中是对的:-)
纠正这个，你和你有一个运行的东西。
-
Mihai Nita [微软MVP，Windows - SDK]
----- -------------------------------------
用_ to替换_year_收到真正的电子邮件
Hi everyone
I want to format a string (using sprintf) and put it in a messagebox
but however I try to do it, it doesn''t seem to work.
Here is an example sample of what i try to do:
char msg[120];
string my_name = "John";
sprintf (msg, "My name is: %s ", my_name);
MessageBox(NULL, msg, NULL, MB_OK);
And this is the error I get:
error C2664: ''MessageBoxW'' : cannot convert parameter 2 from ''char
[120]'' to ''const unsigned short *''
Types pointed to are unrelated; conversion requires reinterpret_cast,
C-style cast or function-style cast
I know that MessageBox wants a LPCTSTR as its second parameter. If I
use that instead (see below)...
LPCTSTR msg;
string my_name = "John";
sprintf (msg, "My name is: %s ", my_name);
MessageBox(NULL, msg, NULL, MB_OK);
....I get the following error:
error C2664: ''sprintf'' : cannot convert parameter 1 from ''const
unsigned short *'' to ''char *''
Types pointed to are unrelated; conversion requires reinterpret_cast,
C-style cast or function-style cast
Seems like what ever I try to use either sprintf or MessageBox is not
happy. If I try to cast ''msg'' in either sprintf or MessageBox I just
get junk as my output.
Does anyone have a suggestion how I can solve this? Please note that I
don''t want to use CString since my platform does not seem to support
that. An example code of how I can solve this problem would be much
appreciated.
Thanks a lot for your help.
/Babak
Hi babak!I want to format a string (using sprintf) and put it in a messagebox
but however I try to do it, it doesn''t seem to work.
Here is an example sample of what i try to do:
char msg[120];
string my_name = "John";
sprintf (msg, "My name is: %s ", my_name);
MessageBox(NULL, msg, NULL, MB_OK);
And this is the error I get:
error C2664: ''MessageBoxW'' : cannot convert parameter 2 from ''char
[120]'' to ''const unsigned short *''
You compile a UNICODE program but you heare are dealing with ANSI strings...
Change it to
<code>
ifdef _UNICODE
#define tstring std::wstring
#else
#define tstring std::string
#endif
TCHAR msg[120];
tstring my_name = _T("John");
__stprintf(msg, _T("My name is: %s "), (LPCTSTR) my_name);
MessageBox(NULL, msg, NULL, MB_OK);
</code>
--
Greetings
Jochen
My blog about Win32 and .NET
http://blog.kalmbachnet.de/
> error C2664: ''MessageBoxW'' : cannot convert parameter 2 from ''char[120]'' to ''const unsigned short *''
Types pointed to are unrelated; conversion requires reinterpret_cast,
C-style cast or function-style cast Looks like the applicaiton is Unicode.
LPCTSTR msg;
string my_name = "John";
sprintf (msg, "My name is: %s ", my_name);
MessageBox(NULL, msg, NULL, MB_OK); What is "string" ?
Anyway, try:
TCHAR msg[120];
TCHAR *my_name = _T("John");
_stprintf (msg, _T("My name is: %s "), my_name);
MessageBox(NULL, msg, NULL, MB_OK);
Notes:
----------------
LPCTSTR msg;
will crash you application, because it is a non-initialized pointer.
It expands to
LPCTSTR:
LP = Long Pointer (the long is obsolete, from the old days when
Intel procesors used segmented memory)
C = const
T = generic text type
STR = string
So, this becomes:
if Non-Unicode: const char * msg;
if Unicode: const wchar_t * msg;
Generic: const TCHAR * msg;
----------------
Note _stprintf insted of sprintf and _T(".....")
If you read the doc for sprintf, you will see a table named
"Generic-Text Routine Mappings". "TCHAR.H routine" is what you
allways want.
----------------
Read about the the "Generic-Text Routine Mappings" in MSDN.
----------------
Read this blurb: http://www.mihainita.net/20050306b.shtml
Please note that I don''t want to use CString since my platform does not
seem to support that.
CString is part of MFC (MFC/ATL in VC.NET). If you configure the
project to use MFC, then you will get it.
--
Mihai Nita [Microsoft MVP, Windows - SDK]
------------------------------------------
Replace _year_ with _ to get the real email
><code>ifdef _UNICODE
#define tstring std::wstring
#else
#define tstring std::string
#endif
TCHAR msg[120];
tstring my_name = _T("John");
__stprintf(msg, _T("My name is: %s "), (LPCTSTR) my_name);
MessageBox(NULL, msg, NULL, MB_OK);
</code>
I did not think about std::string :-)
Jochen is right, that is what you should do.
But he is not right in double-underscore in __stprintf :-)
Correct that, and you have a running thing.
--
Mihai Nita [Microsoft MVP, Windows - SDK]
------------------------------------------
Replace _year_ with _ to get the real email
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