char *strrchr( const char *string, int c );

char *wcsrchr( const wchar_t *string, int c );

int _mbsrchr( const unsigned char *string, unsigned int c );

Return Value

Each of these functions returns a pointer to the last occurrence of c in string, or NULL if c is not found.

Parameters

string

Null-terminated string to search

c

Character to be located

Remarks

The strrchr function finds the last occurrence of c (converted to char) in string. The search includes the terminating null character.

wcsrchr and _mbsrchr are wide-character and multibyte-character versions of strrchr. The arguments and return value of wcsrchr are wide-character strings; those of _mbsrchr are multibyte-character strings. These three functions behave identically otherwise.

Generic-Text Routine Mappings

Example

/* STRCHR.C: This program illustrates searching for a character * with strchr (search forward) or strrchr (search backward). */#include <string.h>#include <stdio.h>int  ch = ‘r‘;char string[] = "The quick brown dog jumps over the lazy fox";char fmt1[] =   "         1         2         3         4         5";char fmt2[] =   "12345678901234567890123456789012345678901234567890";void main( void ){   char *pdest;   int result;   printf( "String to be searched: \n\t\t%s\n", string );   printf( "\t\t%s\n\t\t%s\n\n", fmt1, fmt2 );   printf( "Search char:\t%c\n", ch );   /* Search forward. */   pdest = strchr( string, ch );   result = pdest - string + 1;   if( pdest != NULL )      printf( "Result:\tfirst %c found at position %d\n\n",              ch, result );   else      printf( "Result:\t%c not found\n" );   /* Search backward. */   pdest = strrchr( string, ch );   result = pdest - string + 1;   if( pdest != NULL )      printf( "Result:\tlast %c found at position %d\n\n", ch, result );   else      printf( "Result:\t%c not found\n" );}

Output

String to be searched:      The quick brown dog jumps over the lazy fox               1         2         3         4         5      12345678901234567890123456789012345678901234567890Search char:   rResult:   first r found at position 12Result:   last r found at position 30

String Manipulation Routines

See Also   strchr, strcspn, _strnicmp, strpbrk, strspn

截取字符串