GANGFANG@cc.utah.edu (04/21/91)
Hi netters!
I have some Windows questions need to be helped with.
1. The 'wsprintf' function doesn't support floating point data, whatelse
can be used to print a float type data into a string?
2. The EDIT controls don't seem to be able to handle more than 64k text
data directly, how can one use edit control to handle a large file?
3. Is there any way to switch between different resolutions and color modes
dynamically? For example, I need the 640x480x256 mode to display medical images
but usually the 256 color drivers are too slow to be used comfortablly to
develop programs, a 800x600x16 driver is better for that. So, it will be more
convenient if one can change the display mode dynamically.
Any help will be greatly appreciated.ebergman@isis.cs.du.edu (Eric Bergman-Terrell) (04/22/91)
I'll try to answer question #1 - since wsprintf doesn't do floating point, use the sprintf that came with your compiler - unless you have BC++ 2.0 which has a bug in sprintf for floating point numbers. If you have BC++ 2.0 consider writing your own floating point to ascii conversion (that's what I had to do). Note this is not a flame - if that's the only serious problem with BC++ 2.0 I'll still be happy. The bug shows up as follows: sprintf(str, "%f", (float) 24 / 27); which places "1.0" into str rather than "0.88888". Please don't call Borland - I already called it in. I have a floating point to ascii conversion routine which I'll post under coercion... Terrell
ferdie@coyote.datalog.com (fred jarvis) (04/22/91)
GANGFANG@cc.utah.edu writes: > Hi netters! > I have some Windows questions need to be helped with. > 1. The 'wsprintf' function doesn't support floating point data, whatelse > can be used to print a float type data into a string? > ... sprintf is still available, which supports floating point data, by including <stdio.h>; however, this will increase the size of your .EXE Fred Jarvis
lwallace@javelin.sim.es.com (Raptor) (04/23/91)
ferdie@coyote.datalog.com (fred jarvis) writes: >GANGFANG@cc.utah.edu writes: >> 1. The 'wsprintf' function doesn't support floating point data, whatelse >> can be used to print a float type data into a string? > sprintf is still available, which supports floating point data, by >including <stdio.h>; however, this will increase the size of your .EXE Beware the near/far pointer and stack/data segment confusion problems, which, though I don't yet completely grok them, have bitten me. This is why Windows has replaced some of the C RTL functions. -- Lynn Wallace | I do not represent E&S. Evans and Sutherland Computer Corp.| Internet: lwallace@javelin.sim.es.com Salt Lake City, UT 84108 | Compu$erve: 70242,101 Revenge is a dish best not served at all.
bonneau@hyper.hyper.com (Paul Bonneau) (04/24/91)
In article <113517@cc.utah.edu> GANGFANG@cc.utah.edu writes: > 2. The EDIT controls don't seem to be able to handle more than 64k text >data directly, how can one use edit control to handle a large file? > Unfortunately, you are hitting the bad old 64k segment limit. As far as I know, this is an implementation limit of the edit control itself. So unless you can find a third party edit control without this limitation you will have to write one yourself (not a trivial task). Sorry - Paul Bonneau.