C ++ Combine 2 Tchar [英] C++ Combine 2 Tchar

问题描述

我尝试合并2 tchar。

  char用户名[UNLEN + 1] 
 DWORD username_len = UNLEN + 1; 
 GetUserName（username，& username_len）; 
 TCHAR * appdatapath =C：\\Users\\+ username +\\AppData; 
  

但我在appdatapath行中遇到错误错误。我如何结合2 tchar？感谢

解决方案

查看 strcat 和 wcscat 。

如果您使用的是Windows电脑，可以使用 _tcscat 将根据 _UNICODE 和 _MBCS 定义，重定向到正确的函数。

也可以通过将_s附加到函数名来使用安全版本。

注释，你也可以使用snprintf，像这样：

  const size_t concatenated_size = 256; 
 char concatenated [concatenated_size]; 
 
 snprintf（concatenated，concatenated_size，C：\\Users\\％s\\AppData，username）; 
  

由于在运行时字符串之前和之后都有字符串文字， p>

I'm trying to combine 2 tchar.

char username[UNLEN+1];
DWORD username_len = UNLEN+1;
GetUserName(username, &username_len);
TCHAR* appdatapath ="C:\\Users\\"+username+"\\AppData";

But I get error error at appdatapath line. How can I combine 2 tchar? Thanks

解决方案

Have a look at strcat and wcscat. You can't add char pointer with char array.

If you are on a windows machine, you can use _tcscat which will redirect to the right function to use depending on _UNICODE and _MBCS defines.

Might want to use the safe versions as well by appending _s to the function name.

As pointed in the comments, you can also use snprintf like so:

const size_t concatenated_size = 256;
char concatenated[concatenated_size];

snprintf(concatenated, concatenated_size, "C:\\Users\\%s\\AppData", username);

Since you have string literals before and after the runtime string, it is probably a better approach.

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