i can print a number to messagebox with wsprintf like this:
.data
template db "%ld",0
number dd 999999
.data ?
buffer db 20 dup(?)
invoke wsprintf,addr buffer,addr template,bil
invoke MessageBox,NULL,ADDR buffer,OFFSET AppName,MB_OK
and the result is ok
but how can we print number like this:
number dd 999.123
i want print that number in my message box,
in wsprintf the template for floating point is none
there were just integer,hexadecimal,string, and char
i want my messagebox show 999.123
anybody help plz ?
Hi
here you find some text about wsprintf:
http://asmsource.8k.com/proccalls/proc-wsprintf.htm
here you find a sample using numbers :)
as zip: http://asmsource.8k.com/files32/mouse32.zip
as text :http://asmsource.8k.com/files32/mouse.asm.txt
all from John A Lyons :)
cu
I would do this with some simple math
yust devide your number by 1000 and save it in some Variable then substart it from the starting value and save it into another var then call wsprintf with
template db "%ld.%ld",0
and let the first argument be var2 and the second var1
thanks for your helping (WHY and theNOP) but by the way does anybody have some subroutine that is more flexible to print floating point number with wsprintf like:
-123.23
-1.5
26373774747747.23
32.2
so how can we now to dive the number by 1000,100,10 or 10000000
and so on ?
sorry but I didn't get that you wanted to hav floating points, because
number dd 999.123
can't be a floating point (dd is multible-DWORD) but I don't know much about floats I would be intrested too
I highly recommend FloatToStr to convert a floating point value to a 0 terminated string. Example
include \masm32\include\masm32.inc
includelib \masm32\lib\masm32.lib
.data
R8t Real8 12.34f
.data?
szBuff db 50 dup (?)
.code
invoke FloatToStr,R8t,addr szBuff
thank's to zadkiel :-> your routine is working
but i still have a problem
i just know that there is a number with type Real8 what is it ?
and how can we use it in fpu (Real8)
i am trying like this but the result is not correct :
AppName db "Learning FPU :->",0
.data
R8t Real8 12.34f
number dd 10.0
.data?
szBuff db 50 dup (?)
sumnumber Real8 ?
.code
fild R8t
fiadd number
fistp sumnumber
invoke FloatToStr,sumnumber,addr szBuff
invoke MessageBox,NULL,ADDR szBuff,OFFSET AppName,MB_OK
My question are :
1. Why the result is 12.34f not 22.34f ?
2. if we change the type of number by Real8 there was an error in fpu operation (sorry i am still learning)
3. Where can i find tutorial about data type and fpu in win32asm
frankily i am student and always use number but there are some difficulties using number in win32asm not as easy as using number in c language or java programming
Ok, sounds like a simple problem. First prior to calling any fpu commands you should probably call finit. Maybe you are anyway you just didn't post it.
But thats probably not the problem. Instead the command fispt isn't doing what you think. Its actually converting the number in the fpu to an integer and storing it as such. When you then pass this to FloatToStr it ( I think ) realises that the number is not in the floating point format and so does not create a string. Therfore when you output value your just outputing the old value.
Solution:
Well there are two depending on what you want
1) Use the command fstp instead of fistp. This will keep the floating point format.
2) If you want the integer value then declare sumnumber as a dword and use invoke dwtoa,sumnumber,addr szBuff to proform the number conversion to a string.
Be sure to check out your masmlib help file, it has info on all the extra routines such as dwtoa, FloatToStr, etc
thank's again to zadkiel for your correction with my fpu code
i have corrected my code for example fiadd with fadd that connected with real number and the result is ok :->
i start feeling that fpu it's gone a be easy