RE: GetStringFromDouble() error68k.c, Line:1568, Write to FormType (id 1600) off: 0, size: 1

[John Sutton]

Looks to me like you haven't initialised the doubleStr pointer.

Either declare it as;
char doubleStr[MAXIMUM_LENGTH_OF_RETURNED_DOUBLE+1];

Or, before you call GetStringFromDouble;
doubleStr=MemPtrNew(MAXIMUM_LENGTH_OF_RETURNED_DOUBLE+1);

If you use the second option, when you're done with it, don't forget to call;
MemPtrFree(doubleStr);

Regards
John

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Re: GetStringFromDouble

[Alan Ingleby]

"dilek.ozgu" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> i use that function. but
> double xx;
>  xx = 816 / 10 ;
> GetStringFromDouble(ss,xx, 2);
> result , ss = > 81  it must be 81.60

Err. That's a C problem, not a problem with the function:

xx = 816 / 10;

is wrong.  816 and 10 are both integers, so an integer division is done.
The result is converted to a double, hence the 81.00.

xx = 816.0d / 10.0d;

is what you're after.   Try this.  Trust me that the GetStringFromDouble
function is not at fault.  It's in use in many programs, and always performs
flawlessly.

Alan



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Re: GetStringFromDouble

[Matt Graham]

dilek.ozgu wrote:
THANKS

its run.
have you got the  StrToDouble function..
Have you tried using the FlpAToF() function?

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RE: GetStringFromDouble

[jose luis garcia]

Hello .
Use this function.
void doubleToStr (char *str,double flpNumber,Int numFractDigits)
{
 long longNumber;
 double flpIP,zeros,round;
 int i,strLen,remainder;
 char sign=' ';
 if (flpNumber<0.0)
 { flpNumber=-flpNumber;
   sign='-'; }
  zeros =1.0;
  for (i=0;i
  round=0.5/zeros;
  flpNumber +=round;
  flpIP=(long) flpNumber;
  flpNumber = flpNumber - flpIP;
  str[0]=sign;
  if (sign=='-')
 StrIToA(&str[1],(long) flpIP);
   else
 StrIToA(&str[0],(long) flpIP);
  strLen=StrLen(str);

  str[strLen]='.';
  str[numFractDigits + strLen + 1] ='\0';
  longNumber = flpNumber * zeros;
  for (i=numFractDigits + strLen;i>strLen; i--)
  {remainder = longNumber %10;
   str[i]=remainder + 0x30;
   longNumber /=10;
   }
 }



From: "dilek.ozgu" <[EMAIL PROTECTED]>
Reply-To: "Palm Developer Forum" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Subject: GetStringFromDouble
Date: Wed, 21 Jan 2004 11:12:28 +0200
i use that function. but
double xx;
 xx = 816 / 10 ;
GetStringFromDouble(ss,xx, 2);
result , ss = > 81  it must be 81.60
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