Movatterモバイル変換

[0]ホーム
URL:

cppreference.com
Namespaces
Variants
    Actions

      strrchr

      From cppreference.com
      <c‎ |string‎ |byte
       
       
       
       
      Defined in header<string.h>
      char* strrchr(constchar* str,int ch);
      		 (1)
      /*QChar*/* strrchr(/*QChar*/* str,int ch);
      		 (2)(since C23)
      1) Finds the last occurrence ofch (after conversion tochar as if by(char)ch) in the null-terminated byte string pointed to bystr (each character interpreted asunsignedchar). The terminating null character is considered to be a part of the string and can be found if searching for'\0'.
      2) Type-generic function equivalent to(1). LetT be an unqualified character object type.
      • Ifstr is of typeconst T*, the return type isconstchar*.
      • Otherwise, ifstr is of typeT*, the return type ischar*.
      • Otherwise, the behavior is undefined.
      If a macro definition of each of these generic functions is suppressed to access an actual function (e.g. if(strrchr) or a function pointer is used), the actual function declaration(1) becomes visible.

      The behavior is undefined ifstr is not a pointer to a null-terminated byte string.

      Contents

      [edit]Parameters

      str - pointer to the null-terminated byte string to be analyzed
      ch - character to search for

      [edit]Return value

      Pointer to the found character instr, or null pointer if no such character is found.

      [edit]Example

      Run this code
      #include <stdio.h>#include <string.h> int main(void){char szSomeFileName[]="foo/bar/foobar.txt";char* pLastSlash= strrchr(szSomeFileName,'/');char* pszBaseName= pLastSlash? pLastSlash+1: szSomeFileName;printf("Base Name: %s", pszBaseName);}

      Output:

      Base Name: foobar.txt

      [edit]References

      • C23 standard (ISO/IEC 9899:2024):
      • 7.24.5.5 The strrchr function (p: TBD)
      • C17 standard (ISO/IEC 9899:2018):
      • 7.24.5.5 The strrchr function (p: TBD)
      • C11 standard (ISO/IEC 9899:2011):
      • 7.24.5.5 The strrchr function (p: 368-369)
      • C99 standard (ISO/IEC 9899:1999):
      • 7.21.5.5 The strrchr function (p: 331)
      • C89/C90 standard (ISO/IEC 9899:1990):
      • 4.11.5.5 The strrchr function

      [edit]See also

      finds the first occurrence of a character
      (function)[edit]
      finds the first location of any character in one string, in another string
      (function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=c/string/byte/strrchr&oldid=172155"
      [8]ページ先頭
      ©2009-2025 Movatter.jp