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string to double ? (delphi)

 
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ups2000ups
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PostPosted: Wed Feb 06, 2008 1:10 am    Post subject: string to double ? (delphi) Reply with quote
well i have a bit noobish question but i dont remember how i do it ....

how to i convert string to double ?


i get error of bouth these ...
StrToDouble
StrToSingle

or is it my compiler thats sux ? .....
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Dark Byte
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PostPosted: Wed Feb 06, 2008 3:32 am    Post subject: Reply with quote
StrToFloat
or
Val
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Snootae
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PostPosted: Wed Feb 06, 2008 5:01 am    Post subject: Reply with quote
http://www.faqts.com/knowledge_base/view.phtml/aid/25371/fid/175

searched on google, its a bit long but all you need is this

Code:
function TForm1.FNMathGetStringToDoubleD( s : string ): double;
var d : double;
begin
 d := StrToFloat( s ); // cast the result to a double (to be sure it
will become a double, and not a real)
 result := d;
end;



so you could just

Code:
var
TheString : string;
DoubledString : Double;
begin
DoubledString := StrToFloat (TheString);
end;


i think thats how it will work, just re-wrote it so you can understand a little better, if you couldn't before
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ups2000ups
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PostPosted: Wed Feb 06, 2008 6:00 am    Post subject: Reply with quote
Snootae wrote:

TheString : string;
DoubledString : Double;
begin
DoubledString := StrToFloat (TheString);
end;


DoubledString : Double;
this will give error in delphi .. it should be single

btw thanks darkbyte Smile
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Snootae
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PostPosted: Wed Feb 06, 2008 6:25 am    Post subject: Reply with quote
well i just tried to simplifiy the code off that site, i assumed it would work, but i did not test
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ups2000ups
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PostPosted: Wed Feb 06, 2008 7:32 am    Post subject: Reply with quote
Snootae wrote:
well i just tried to simplifiy the code off that site, i assumed it would work, but i did not test


okay thansk anyway Razz it is just that delphi use single instead of double Wink (not always thought ...)
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