Try this:
V=-1
WHILE TRUE
PRINT V,100,100
SHOWSCREEN
KEYWAIT
V=V+.1
IF V=1.1 THEN V=-1
WEND
V= 1.38...e-016 instead of 0
V=1.e001 instead of 1
When V=1.1 the test dont work
What i'm doing wrong ?
Thx
Gilles
Oh dear! Floating points are a binary representation of your numbers "1.1". You cannot accuratly set all these numbers to the value you write, internally 9 is 8.9999999999999. So, you should test it like:
V=-1
WHILE TRUE
PRINT FORMAT$(0,1,V), 100, 100
SHOWSCREEN
KEYWAIT
V=V+.1
IF V>=1.1 THEN V=-1
// or:
IF ABS(V - 1.1)<1e-7 THEN V=-1
WENDSorry, that's the way computers work. With non-fraction numbers you will not see any problems. It's just the fraction part that causes headache here.
Ok, i will work with integer and divide by 10 when needed.
Thank