CHARPOS

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Action

Returns the position of a single character in a string.

 

 

Syntax

pos = CHARPOS(string , search [,start [,SAFE]])

 

 

Remarks

Pos

Numeric variable that will be assigned with the position of the sub string in the string. Returns 0 when the sub string is not found.

String

The string to search.

Search

The search string. This can be a numeric variable too. For example a byte. When a string is used, only the first character will be used for the search.

Offset

An optional start position where the searching must start.

SAFE

If you specify an offset, Charpos will check if the offset is not located after the string. For example , when the string is "abc" and you specify an offset of 10, it will be located after the string.

The SAFE option is default. When you specify SPEED, the compiler will add the offset without checking. This will result in shorter and quicker code.

 

No constant can be used for string it must be a string variable.

noticeThe search is sensitive to case.

 

 

See also

SPLIT , INSTR , REPLACECHARS , DELCHAR , INSERTCHAR , DELCHARS

 

 

Example

'-------------------------------------------------------------------------------

'                       charpos.bas

'               (c) 1995-2009  MCS Electronics

$regfile = "m88def.dat"

$crystal = 8000000

$baud = 19200

'-------------------------------------------------------------------------------

Dim S As String * 20

Dim Bpos As Byte

Dim Z As String * 1

 

Z = "*"

Do

Input "S:" , S

 Bpos = Charpos(s , Z)

Print Bpos

Loop Until S = ""

 

 

Do

Input "S:" , S

 Bpos = Charpos(s , "A")                                   ' notice charpos is sensitive to case

Print Bpos

Loop