InStr

Again !

This time i need the code for InStr in either C++ or Vb functions using the CString class.

See my other post for why you shouldn't use CString :)

Use the StrChr function.

The strchr function finds only a character in a strin. To find a substring of a string use the strstr function

MSDN Info

Code:

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strstr, wcsstr, _mbsstr
Find a substring.

char *strstr( const char *string, const char *strCharSet );

wchar_t *wcsstr( const wchar_t *string, const wchar_t *strCharSet );

unsigned char *_mbsstr( const unsigned char *string, const unsigned char *strCharSet );

Routine Required Header Compatibility
strstr <string.h> ANSI, Win 95, Win NT
wcsstr <string.h> or <wchar.h> ANSI, Win 95, Win NT
_mbsstr <mbstring.h> Win 95, Win NT


For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB Single thread static library, retail version
LIBCMT.LIB Multithread static library, retail version
MSVCRT.LIB Import library for MSVCRT.DLL, retail version


Return Value

Each of these functions returns a pointer to the first occurrence of strCharSet in string, or NULL if strCharSet does not appear in string. If strCharSet points to a string of zero length, the function returns string.

Parameters

string

Null-terminated string to search

strCharSet

Null-terminated string to search for

Remarks

The strstr function returns a pointer to the first occurrence of strCharSet in string. The search does not include terminating null characters. wcsstr and _mbsstr are wide-character and multibyte-character versions of strstr. The arguments and return value of wcsstr are wide-character strings; those of _mbsstr are multibyte-character strings. These three functions behave identically otherwise.

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MSDN Example

Code:

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Example

/* STRSTR.C */

#include <string.h>
#include <stdio.h>

char str[] =    "lazy";
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%s\n", string );
  printf( "\t%s\n\t%s\n\n", fmt1, fmt2 );
  pdest = strstr( string, str );
  result = pdest - string + 1;
  if( pdest != NULL )
      printf( "%s found at position %d\n\n", str, result );
  else
      printf( "%s not found\n", str );
}


Output

String to be searched:
  The quick brown dog jumps over the lazy fox
            1        2        3        4        5
  12345678901234567890123456789012345678901234567890

lazy found at position 36

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