about _atof

[talun]

Hi to all,
I need to convert strings in exponential format  and I have noticed that the val () function  it is not able to perform this conversion. I have tried with the function _atof () of the crtdll.lib (see the example below) and everything seems to work fine but I am not sure if I am doing something of wrong.

Code Select Expand


declare cdecl extern _atof(mystr as string),double

string test
double number

test = "4.94171e+006"
number = _atof(test)
print number
print val(test)

do : until inkey$ <> ""
end

Can anyone help me?

Thanks!

Sergio

[Parker]

You need to use SETPRECISION to change the precision that PRINT prints.

[talun]

Parker, many thanks for your reply. I know SETPRECISION, but what I would to know if to use the function atof as I have done, can create problems in my programs (for example, the atof declaration is correct?)

Thanks!

Sergio

[Ionic Wind Support Team]

Looks correct to me

[talun]

Paul, thank you for your reply.
Can you suggest to me where to find the contents and the declarations of the crtdll lib?? (I've browsed the MSDN site with poor results)

Thanks

Sergio

[Ionic Wind Support Team]

http://msdn2.microsoft.com/en-us/library/634ca0c2(VS.80).aspx

Some functions may or may not have an extra underscore prepended to them.  If you get an error from the linker that is the first place to look.  Microsoft likes to deviate from the C standard, sometimes between different VC library versions

Of course just searching Google, for a specific funciton name like sprintf, will bring up hundreds of references.  Here's one that is used by Linux programmers, the C library is cross platform so the functions work the same:

http://www.phim.unibe.ch/comp_doc/c_manual/C/FUNCTIONS/funcref.htm#headers

Paul.

[talun]

Thanks!   

Bye

Sergio