Visual Studio中stricmp和_stricmp的区别？ [英] Difference of stricmp and _stricmp in Visual Studio?

问题描述

我可能会问一个愚蠢的问题，但我真的无法在Google上找到答案，而且我仍然是使用MSVS的初学者。

I may asking a stupid question, but I really can't find an answer with google plus I am still a beginner of using MSVS.

我最近需要使用函数比较两个字符串。我不明白stricmp和_stricmp的区别。它们都可以用于比较字符串并返回相同的结果。我去检查了它们：

I recently need to use functions to make comparison of two strings. What I don't understand is the difference of stricmp and _stricmp. They both can be used to compare strings and return the same results. I went to check them:

char string1[] = "The quick brown dog jumps over the lazy fox";
char string2[] = "The QUICK brown dog jumps over the lazy fox";

void main( void )
{
   char tmp[20];
   int result;
   /* Case sensitive */
   printf( "Compare strings:\n\t%s\n\t%s\n\n", string1, string2 );
   result = stricmp( string1, string2 );
   if( result > 0 )
      strcpy( tmp, "greater than" );
   else if( result < 0 )
      strcpy( tmp, "less than" );
   else
      strcpy( tmp, "equal to" );
   printf( "\tstricmp:   String 1 is %s string 2\n", tmp );
   /* Case insensitive */
   result = _stricmp( string1, string2 );
   if( result > 0 )
      strcpy( tmp, "greater than" );
   else if( result < 0 )
      strcpy( tmp, "less than" );
   else
      strcpy( tmp, "equal to" );
   printf( "\t_stricmp:  String 1 is %s string 2\n", tmp );
}

结果表明它们是相同的：

result shows they are the same:

Compare strings:
    The quick brown dog jumps over the lazy fox
    The QUICK brown dog jumps over the lazy fox

    stricmp:   String 1 is equal to string 2
    _stricmp:  String 1 is equal to string 2

我想知道为什么...

I am wondering why...

推荐答案

stricmp 是POSIX函数，而不是标准的C90函数。为避免名称冲突，Microsoft不建议使用不符合标准的名称（ stricmp ），并建议使用 _stricmp 。功能上没有区别（ stricmp 只是 _stricmp 的别名。）

stricmp is a POSIX function, and not a standard C90 function. To avoid name clashes Microsoft deprecated the non-conforming name (stricmp) and recommends using _stricmp instead. There is no difference in functionality (stricmp is merely an alias for _stricmp.)

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