Strange value of the double type variable: -nan(0x8000000000000)
I am confused by the value of "currdisk->currangle" after adding operation. Initially the value of "currdisk->currangle" is 0.77500000000000013, but after adding operation, it's changed to "-nan(0x8000000000000)", Can anyone explain ? Thanks! The following is the occasion of gdb debugging.
Then I change currdisk->currangle += (simtime - seg->time) / currdisk->rotatetime ;
to double tmp1 = (simtime - seg->time) / currdisk->rotatetime;
currdisk->currangle += tmp1;
The value of currdisk->currangle is normal. Can anyone explain the confusing phenomenon ?
---------- Post updated 05-30-14 at 02:25 AM ---------- Previous update was 05-29-14 at 10:56 PM ----------
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