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Tony,See <FONT
color=#ff0000>embedded.Bob-----Original
Message-----From: aew_o [<A
href="">mailto:awenos@xxxxxxxxx]Sent: Monday,
April 05, 2004 7:32 AMTo: amibroker@xxxxxxxxxxxxxxxSubject: [amibroker]
AFL HelpHi All,I've been reviewing some codes to improve my
programming and findsome things in the following code that I don't
understand. I've runthe code and it executes without
error.#1This line in the procedure:if( box1[j] = swap) I
would have thought that the operator should have been == to <FONT
color=#ff0000><== Agreecreate a conditional
expression. Why does the code function as isand what is the
meaning?(there are two occurances like this) <FONT
color=#ff0000>No Clue
#2This line in the main loop.if
(Low[i]<(BoxBot*(1-tick/100)) || High[i]>(BoxTop*(1+tick/100)))The
conditional operator is ||, but, in the Help file, it shows asa single | can
be used for an OR operator. What is the proper useageof |?(Again, there are
multiple ocurrances)
|| is correct- a single | is the bitwise
or#3This line in the main loop.swap =
!swap;I have no idea what this might be.As a note, I see
in the change logs that && and || and ! wereadded as AND/OR/NOT
synonyms, but in the table of operators theyare shown as & and |. ! is
not shown as a logical operator. I assumethat the first is correct since the
code works, but the definitionsin Help are at odds with one another.
All the ops are shown in the
precedence table [easiest to search in the pdf manual]
! [bang] is the C not operator.
not equal => != and [less
frequently seen] a = !a to invert a boolean.
<FONT
color=#000000>TIARegardsTony //////////begin/////////box1=0;box2=0;procedure
fillDarvas(start,end,swap,top, bottom
){ for ( j = start; j < end;
j++){ if( box1[j] =
swap)box1[j]= top ;elsebox1[j]= bottom;if(box2[j] =
swap)box2[j]= bottom ;elsebox2[j]= top;}}BoxArr1 =
0;BoxArr2 = 0;StateArray = 0;DBuy = 0;DSell = 0;TopArray =
0;BotArray = 0;tick=0;BoxTop = High[0];BoxBot =
Low[0];swap=0;state = 0;BoxStart = 0;for (i=0;
i<BarCount; i++){if
(state==5){ TopArray[i]=BoxTop;BotArray[i]=BoxBot;if
(Low[i]<(BoxBot*(1-tick/100)) ||
High[i]>(BoxTop*(1+tick/100))){fillDarvas(BoxStart,i,swap,BoxTop,BoxBot);state
= 1;swap = !swap;BoxTop = High[i];BoxStart =
i;}}else{if (High[i]<BoxTop){if ((state<3) ||
(Low[i]>BoxBot)){state++; } else{state=3;}
if
(state==3)BoxBot=Low[i];}else{state=1;BoxTop=High[i];}}StateArray[i]
=
state;}fillDarvas(BoxStart,BarCount,swap,BoxTop,BoxBot);Plot(C,"",1,64);Plot(
box1, "" , colorRed, 512 );Plot( box2, "" , colorGreen , 512
);///////////end///////////////////Send BUG REPORTS
to bugs@xxxxxxxxxxxxxSend SUGGESTIONS to
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