| description | title | ms.date | helpviewer_keywords | ms.assetid | ||
|---|---|---|---|---|---|---|
Learn more about: Byte Indices |
Byte Indices |
11/04/2016 |
|
f6e7774a-86c6-41c2-89e3-74fd46432e47 |
Use the following tips:
-
Working with a bytewise index into a string presents problems similar to those posed by pointer manipulation. Consider this example, which scans a string for a backslash character:
while ( rgch[ i ] != '\\' ) i++;
This might index a trail byte, not a lead byte, and thus it might not point to a
character. -
Use the _mbclen function to solve the preceding problem:
while ( rgch[ i ] != '\\' ) i += _mbclen ( rgch + i );
This correctly indexes to a lead byte, hence to a
character. The_mbclenfunction determines the size of a character (1 or 2 bytes).