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Hello,
There is an error in the the description of %
operator.
In fact it uses internaly fmod() C-runtime library
function for
performing operations. It means that it does not
round the numbers
to nearest integers:
The fmod runtime function (and x % y
operator in AFL) calculates the floating-point remainder f of x /
y such that x = i * y + f, where
i is an integer, f has the same sign as x, and the absolute
value of f is less than the absolute value of y.
Best regards,Tomasz
Janeczko===============AmiBroker - the comprehensive share
manager.<A
href="">http://www.amibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Dimitris
Tsokakis
To: <A title=amibroker@xxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Wednesday, September 05, 2001
8:17 PM
Subject: [amibroker] Modulus Operator
and PI
Dear Tomasz,
The new 3.70 Help is very well prepared again. Tutorials for new items is
the
certainly the best way.
I noticed something not so clear in
Modulus operator
A new operator (%) - modulus (or remainder) was
added:
result = number1 % number2
The modulus, or remainder, operator divides number1 by number2
(rounding floating-point numbers to integers) and returns only
the remainder as result.
The plural "numbers" in the parenthesis may be translated that we round
number1 and number2, then we divide and then take the remainder.
This would give 3.2%3.1==3%3==0, which is not the result of
3.2%3.1.
As I saw, the procedure is
3.2/3.1 gives 1.03
1.03 becomes 1 after rounding
3.2-3.1*1==0.1, which is the 3.2%3.1.
I saw that the generic formula behind % is
R1%R2==R1-R2*INT(R1/R2);
for positive, negative, integers or non-integers.
Is it O. K. ?
Please confirm.
Best regards
Dimitris Tsokakis
P. S. Please remember in some next edition to correct the typo in
EXAMPLE
The formula "atan( 1.00 )" returns PI/2
It is our only source for PI in AFL.
PI=4*atan(1);
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