GetCurrentDirectory缓冲区不返回正确的值 [英] GetCurrentDirectory buffer doesn't return the right value

问题描述

我有一个问题与 GetCurrentDirectory（），我真的不明白为什么。我不明白的是，它适用于XP，但不是为七（或至少在我的电脑）。有我的代码：

  char dir_name [1024] //作为全局变量
 int get_files（）{
 // ... 
 DWORD dwRet; 
 dwRet = GetCurrentDirectory（MAX_PATH，dir_name）; 
 printf（％s\\\
，dir_name）; 
 printf（％d\\\
，dwRet）; 
 // ... 
} 
  

此代码将返回： p>

printf（％s\\\
，dir_name）; - > returnc

printf（％d\\\
，dwRet）; > 42 （这是应该返回的字符串的正确长度）

dir_name只接受值c。

解决方案

我认为，结果是Windows 7中的Unicode！并且在这个函数的每个ascii字符后面有零。并且您正在打印 printf 。您应该在程序中使用宽字符函数。

尝试下面的代码：（在Visual Studio 2008 + Windows 7中测试）

$ b
$ b

  #include< stdio.h> 
 #include< windows.h> 
 #include< wchar.h> 
 
 WCHAR dir_name [1024]; //作为全局变量
 
 int get_files（）
 {
 // ... 
 DWORD dwRet; 
 dwRet = GetCurrentDirectory（MAX_PATH，dir_name）; 
 wprintf（L％s\\\
，dir_name）; 
 printf（％d\\\
，dwRet）; 
 // ... 
 return 0; 
} 
  

I have an issue with GetCurrentDirectory(), and i don't really understand why. The thing i don't understand is that it works for XP but not for Seven (or at least on my computer). There is my code:

char dir_name[1024]; // as a global variable
int get_files() {
// ...
DWORD dwRet;
dwRet = GetCurrentDirectory(MAX_PATH, dir_name);
printf("%s\n",dir_name);
printf("%d\n",dwRet);
//...
}

This code will return:

printf("%s\n",dir_name); -> return "c"

printf("%d\n",dwRet); -> 42 (which is the right length of the string that should be returned)

I don't understand why dir_name only takes the value "c".

解决方案

I think, the result is Unicode in Windows Seven! and after each ascii character of this function there is zero. And you are printing it by printf. You should use wide-char functions in your program. Like wprintf.

Try below code: (Tested in Visual Studio 2008 + Windows 7)

#include <stdio.h>
#include <windows.h>
#include <wchar.h>

WCHAR dir_name[1024]; // as a global variable

int get_files()
{
    // ...
    DWORD dwRet;
    dwRet = GetCurrentDirectory(MAX_PATH, dir_name);
    wprintf(L"%s\n", dir_name);
    printf("%d\n", dwRet);
    //...
    return 0;
}

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