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Convert CHAR to INTEGER
Posted: Tue Feb 01, 2011 11:03 am
by Helpdesk
How do I convert a CHAR (from serial input) to an INTEGER?
Re: Convert CHAR to INTEGER
Posted: Tue Feb 01, 2011 11:10 am
by cfbsoftware
The built-in ORD function will
typecast a CHAR to INTEGER i.e.
Code: Select all
VAR
ch: CHAR;
i: INTEGER;
...
...
i := ORD(ch);
This gives you the corresponding numeric ASCII value for that character. Knowing this, if you want to convert a single character (e.g. '9') to the integer value (e.g. 9) you can then say:
Code: Select all
IF ('0' <= ch) & (ch <= '9') THEN i := ORD(ch) - ORD('0') END;
Note that the Convert library procedure StrToInt can be used to convert strings to
integers.