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Jul 17, 2002, 4:22pm

I'm using Borland C++Builder. I have VERY limited knowledge of C++, although
I have programming experience in other languages. I am taking a crash
course, learn-as-you-go method and making a bot.

I want the Co-ords for the bot's position to be entered as the usual 10n 5w
10a 90, but the SDK needs that separated. I know how to do the simple math
to multiply those numbers to what the SDK needs, but what I dunno how to do
is to split that up, know if it should be north or south, and whatever.
Could anyone help me out?

Thanks,
Percipient

Jul 17, 2002, 4:52pm

Hmm, im not sure, i only started learning VC++ 2 days ago but here is my bet
considering their relitivly the same, use the MSDN to help.

First if it dosent have a split(x) function like VB do a for loop from 1 to
the length of the string.

Create a array using something allong the lines of:

Int Range[4]
Int SetVal
For(i, strlen(section),i += 1);
{
If(char(i) = "");
{
SetVal += 1;
}
Else;
{
Range[SetVal] = range[setval] + Char(i);
}
End if;
}

Then take the last byte of each of em and if its either N or S is Z axis, so
take all the bytes except the last 1 and do the maths with em, then if its E
or W then its X, all but last byte and do maths, if its a then its altitude,
if its non of em is YAW.

My apologies if this is a bunch of pure rubbish but ive only done a grand
total of 20 min of VC++

- Mark
*Gawd i hate learning this*

Jul 17, 2002, 6:38pm

Assuming you're changing from another language, write a parser in the one
you know, keeping to the low-level functions (no language-specific specific
stuff that doesn't have a C++ equivalent) and convert the working code. That
way (a) you can write the function faster as you know the language better,
(b) you know the logic works when you get to the point of writing the c++
version so you know the problem is with the actual converted code and (c)
its much easier to write code in a new language when you've already got a
visualisation of the breakdown of the function.

Grims

[View Quote]

Jul 17, 2002, 7:13pm

I'm not sure what split() in VB does, but C has more
than one function to break a string into parts, for
example strtok() and sscanf().
It could look somehow like this :

char SNString[30], EWString[30], World[30], AString;
sscanf (InputString, "%s %s %s %s", World, SNString, EWString, AString);


A function to get the coord's integer values from the
broken out parts is atoi()
To get the last characters (the direction), I would
use array addressing together with strlen(), e.g.

int SNValue;

SNValue = atoi (SNString);

The atoi() stops at the first non-numeric character, so
there's no need to remove anything.

if ( (SNString[strlen(SNString)-1] | 0x20) == 's')
SNValue = -SNValue;


The "| 0x20" makes the character lowercase, independant
from what the user typed.

Jul 17, 2002, 8:26pm

StrFunction = Split(Expression, Key (or something))

It creates a string array of StrFunction in sections as seperated by the
key.. ie:

StrSomething = split("me,you,him,her,baron,brant",",")
you would get
StrSomething(0) = "me"
StrSomething(1) = "you"
StrSomething(2) = "him"

etc ect ect

Jul 17, 2002, 8:55pm

Wow I don't know who taught you C++ but.. wow. If that's how VC++ works I
want none of it. Just trying to tell you you need to relearn the basic
syntax of C++. :) don't take that the wrong way though. 20 mins should've
taught you that much you silly willy.

--Bowen--

[View Quote]

Jul 17, 2002, 11:41pm

Ah, all those replies and no working code. It makes me feel wanted. The
function I use is strtok, since it's ANSI C. I believe the header on that
one is string.h. Note that I almost ALWAYS use STL string... more
versatile... just
#include <string>
using namespace std;
and then you can do string MyString.... but calling my soon-to-be-listed
parse function with a string of any other type that I've ever tested with
would work fine.

This will take a string like "1000 -1000 10 90" and fill in the soon to be
shown Coordinates struct. As an excersize (oh God, it must be summer) for
the student, I'm not gunna deal with the characters NSEW, and use negative
numbers instead.

struct Coordinates
{
int x;
int y;
int z;
int yaw;
};

Coordinates *GetCoordinates(string ParseFrom)
{
char *token;

Coordinates ParseReturn;

token = strtok(ParseFrom.c_str(), " "); // 1234n 5678e leaves token as
// 1234n
ParseReturn.x = atoi(token);

token = strtok(NULL, " "); // parse between the first two spaces
ParseReturn.z = atoi(token);

token = strtok(NULL, " ");
ParseReturn.y = atoi(token);

token = strtok(NULL, " ");
ParseReturn.yaw = atoi(token);
}


So as a quick recap, if you have a string like -1234 5678 9 10

You can do Coordinates MyCoords = GetCoordinates(string); and then access
members of the structs.

Of course, since I'm dealing with pointers and don't have any coffee on my
desk, that's a sign that you want to test and come back during the day hours
if this doesn't work. I know how to do it; I've done it before. Just
::yawn:: tired.

-J


[View Quote]

Jul 18, 2002, 2:59am

It's like strtok() then, with a slightly different handling :)

Thx

[View Quote]

Jul 18, 2002, 3:01am

The advantage of incomplete snippets over a
ready-made solution :

The developer has to deal with the why and the
how and will easier understand what he implements :)


[View Quote]

Jul 18, 2002, 10:52am

I did the very same thing with VisualBasic a few weeks back. This might help
you to figure it out.

Private Sub TportButt_Click()
Dim teleport As String
Dim intX As Long
Dim intZ As Long
Dim intStart As Integer

'turn coords into meters the bot can use to tport
teleport = Coords.Text

For X = 2 To 35
If UCase(Mid(teleport, X, 1)) = "N" Or UCase(Mid(teleport, X, 1)) = "S"
Then
intX = Val(Left(teleport, X - 1))
If UCase(Mid(teleport, X, 1)) = "S" Then intX = intX * (-1000)
If UCase(Mid(teleport, X, 1)) = "N" Then intX = intX * 1000
Exit For
End If
Next X

For X = 2 To 35
If Mid(teleport, X, 1) = " " Then intStart = X
If UCase(Mid(teleport, X, 1)) = "E" Or UCase(Mid(teleport, X, 1)) = "W"
Then
intZ = Val(Mid(teleport, intStart + 1, X - 1))
If UCase(Mid(teleport, X, 1)) = "E" Then intZ = intZ * (-1000)
If UCase(Mid(teleport, X, 1)) = "W" Then intZ = intZ * 1000
Exit For
End If
Next X

rc = ChatForm.SDK.AwEnter(World.Text)
If rc Then
ChatForm.AwChat.SelColor = vbRed
ChatForm.AwChat.SelBold = True
ChatForm.AwChat.SelItalic = False
ChatForm.AwChat.SelText = "Error! Reason " & rc & vbCrLf
Exit Sub
End If

ChatForm.SDK.AwMyX = intZ
ChatForm.SDK.AwMyY = 0
ChatForm.SDK.AwMyZ = intX
ChatForm.SDK.AwMyYaw = 0
ChatForm.SDK.AwMyType = 0

rc = ChatForm.SDK.AwStateChange
If rc Then
ChatForm.AwChat.SelColor = vbRed
ChatForm.AwChat.SelBold = True
ChatForm.AwChat.SelItalic = False
ChatForm.AwChat.SelText = "Error! Reason " & rc & vbCrLf
Exit Sub
End If

ChatForm.AwChat.SelColor = vbBlue
ChatForm.AwChat.SelBold = True
ChatForm.AwChat.SelItalic = False
ChatForm.AwChat.SelText = "[" & LogInForm.BotName & "] has been
successfully teleported to " & teleport & "." & vbCrLf
TportForm.Visible = False
End Sub

[View Quote]

Jul 18, 2002, 11:32am

Well, of course, but I always give snippets for my ideas and no one's
mentioned strtok...
-J

[View Quote]

Jul 18, 2002, 10:17pm

you just haven't read it *g

news://news.activeworlds.com/3D35D935.FEAE3F64%40oct31.de


[View Quote]

Jul 25, 2002, 5:41pm

20 min, 4 cups of tea, and the first 2 chapters about installing VS and
Loading consoles :)

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