比较字符串从txt文件读取时，CompareStringW无法正常工作。 [英] CompareStringW not working when comparing string read from a txt file.
问题描述
我正在尝试使用CompareStringW API函数比较2个字符串，如下所示。
#include" stdafx .h" b $ b #include< stdio.h>
#include< Windows.h>
typedef char * Str;
Str password =" administrator"; $
int _tmain（int argc，_TCHAR * argv []）
{
char * filename =" C：\\ProgramData \\ PMS \\ViewForum \\UserData \\Default_UserData.txt" ;;
char * key ="管理员" ;;
Search_in_File（文件名，密钥）;
getch（）;
}
$
int Search_in_File（char * fname，char * str）
{
FILE * fp;
int line_num = 1;
int find_result = 0;
char temp [512];
int stringLen;
int stringLen1;
WORD语言环境;
unsigned int length = 0;
int resultComp;
// Visual Studio用户
if（（fopen_s（& fp，fname，" r"））！= NULL）
{
return（-1）;
}
while（fgets（temp，512，fp）！= NULL）
{
如果（的strstr（温度， str）！= NULL）
{
find_result ++;
if（find_result> 0）
{
printf（" \\\
\\\
File：％s" ，temp）;
break;
}
}
&NBSP; }
length = strlen（temp）;
&NBSP; &NBSP; &NBSP; if（temp [length - 1] =='\ n'））
{
; &NBSP; &NBSP; &NBSP; &NBSP; temp [ - length] ='\ 0';
}
resultComp = CompareString（locale，SORT_STRINGSORT，temp，-1，password，-1）;
printf（" \ nn \ nresultComp CompareString：％d"，resultComp）;
< span style ="white-space：pre"> stringLen = strlen（temp）;
stringLen1 = strlen（密码）;
printf（" \ n \\ n \\ n \\ n密码：密码：％d，％d&"; stringLen，stringLen1）;
line_num ++;
}
这里，s2是硬编码的，从txt文件中读取temp。我从文件的字符串结尾读取了/ n，并且两个字符串都是空终止的。 Comparestring总是返回3（temp> S2），即使字符串相等。比较相同的字符串
和strcmp它似乎工作正常（返回0）。
注意：我正在使用visual studio 2008作为目标产品在Windows嵌入式操作系统上。
API参考：https：//docs.microsoft.com/en-us / windows / desktop / api / stringapiset / nf-stringapiset-comparativetringw
我做错了吗？任何人都可以建议可能的解决方案。
< blockquote>
当我尝试编译代码时遇到很多错误：函数参数的不兼容类型，没有原型的函数，Search_in_File有一个不返回值的路径，等等。
<您是否剪切并粘贴了代码或重新键入代码？
我找不到任何对CompareStringW的引用。 由于您的所有程序变量都是单字节而不是双字节，因此我不知道您为什么要使用该功能。
I'm trying to compare 2 strings using CompareStringW API function as below.
#include "stdafx.h"
#include <stdio.h>
#include <Windows.h>
typedef char * Str;
Str password = "administrator";
int _tmain(int argc, _TCHAR* argv[])
{
char* filename = "C:\\ProgramData\\PMS\\ViewForum\\UserData\\Default_UserData.txt";
char* key ="administrator";
Search_in_File(filename, key);
getch();
}
int Search_in_File(char *fname, char *str)
{
FILE *fp;
int line_num = 1;
int find_result = 0;
char temp[512];
int stringLen;
int stringLen1;
WORD locale;
unsigned int length = 0;
int resultComp;
//Visual Studio users
if((fopen_s(&fp, fname, "r")) != NULL)
{
return(-1);
}
while(fgets(temp, 512, fp) != NULL)
{
if(strstr(temp, str) != NULL)
{
find_result++;
if(find_result>0)
{
printf("\n\nFile : %s",temp);
break;
}
}
}
length = strlen(temp);
if (temp[length - 1] == '\n')
{
temp[--length] = '\0';
}
locale = GetUserDefaultLCID();
resultComp = CompareString(locale, SORT_STRINGSORT, temp, -1, password, -1);
printf("\n\nresultComp CompareString : %d",resultComp);
stringLen = strlen(temp);
stringLen1 = strlen(password);
printf("\n\nsize of string passwd, password: %d , %d",stringLen, stringLen1);
line_num++;
}
Here, s2 is hardcoded and temp is read from a txt file.I have removed /n from end of string read from file and both the strings are null terminated. Comparestring is always returning 3(temp>S2) even though strings are equal.tried to compare same strings
with strcmp and it seems to be working fine(returns 0).
Note : I'm using visual studio 2008 as the target product is on Windows embedded OS.
API reference : https://docs.microsoft.com/en-us/windows/desktop/api/stringapiset/nf-stringapiset-comparestringw
Am i doing it wrong? can anyone suggest the possible solution.
I get numerous errors when I try to compile your code: incompatible types for function arguments, functions without prototypes, Search_in_File has a path that does not return a value, etc.
Did you cut and paste your code or retype it?
And I cannot find any reference to CompareStringW. Since all your program variables are single byte and not double byte, I don't know why you would want to use that function anyway.
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