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richi-d
Joined: 28 Aug 2007
Posts: 106
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| if doesn´t work |
 Posted: Thu May 10, 2012 5:00 am |
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Hello,
It´s frustrating: is there any reason why the "if" command jumps in when the value GY_SUMME[0] in the watch is 0?
| Code: |
float GY_SUMME[5];
if (GY_SUMME[0] == 100)
{
strcpy (TEXT, "I");
TEXT_7x8_schreiben (72,11);
} |
Version is 4.132 Pic 24FJ128GA106 |
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SherpaDoug
Joined: 07 Sep 2003
Posts: 1640
Location: Cape Cod Mass USA
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| Posted: Thu May 10, 2012 5:53 am |
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I might try either of these:
if (GY_SUMME[0] == 100.0)
if ((int)GY_SUMME[0] == 100)
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richi-d
Joined: 28 Aug 2007
Posts: 106
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| Posted: Thu May 10, 2012 6:41 am |
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Hello,
the second one
| Code: | if ((int)GY_SUMME[0] == 100)
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works, but not the first one? Why? I never had to do that before in older compiler versions... |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Thu May 10, 2012 7:44 am |
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Two comments.
- Float compare for equality can easily fouled by rounding errors. You should better avoid it.
- If you want others to reproduce and possibly solve the problem, post a small compilable test program that shows it. |
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richi-d
Joined: 28 Aug 2007
Posts: 106
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| Posted: Thu May 10, 2012 9:31 am |
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Hello,
rounding errors are no problem as I want to compare with a >
The code above was just for example.
It works now with
| Code: | | if ((int)GY_SUMME[0] > 100) |
So it´s o.k. for me- I was just again wondering... |
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dyeatman
Joined: 06 Sep 2003
Posts: 1933
Location: Norman, OK
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| Posted: Thu May 10, 2012 12:16 pm |
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In some cases CCS made changes like this to be more ANSI compliant.
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