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Home > Forums > Programmers > Languages > Pascal in the workplace Forum

Convert String To Integer / Real

Read More Threads Like This One

XRMICHAEL (TechnicalUser)

31 Jan 08 18:12

Hi, sorry if this seem a bit of a simply ? but i only have a need to write very basic programs.

I have to write a small programme to read a serial output from a device and represent the level data on a touch screen.

The screen can only show levels that are real/integer values.

I have stripped the relevant byte of level information with

ZONE1LEVEL:=(RECEIVEDDATA[6]);

I then try and ZONE1LEVEL:=STRINGTOINT byte 6 from above data, but ZONE1LEVEL always = 0.

With my limited knowledge stringtoint will result in 0 if the data to be converted is not something or other.

Byte 6 above will be in the range of #00 to #64

Any help greatly received.

feherke (Programmer)

1 Feb 08 5:52

Hi

The good old Pascal has no StrToInt() function. If you are using Delphi or Kylix see forum102: CodeGear (Borland): Delphi or forum755: CodeGear (Borland): Kylix. If not, tell us what flavor are you using.

Feherke.
http://rootshell.be/~feherke/

svanels (MIS)

11 Mar 08 17:45

Try the Val procedure

Val( TextVal, Number , Code) which converts String to a number.
  if this is possible the result of code = 0, other wise code indicates the character where
the error occurred

   example:

    Textval := '354';
    Val(Textval, Number, Code)  ---> Code = 0, Number = 354

   Textval := '37645x2';
   Val( Textval, Number, Code)  ---> Code = 6,  Number remains unchanged;

Steven

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