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2 dimensional Const char ?

 
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Gabriel



Joined: 03 Aug 2009
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2 dimensional Const char ?
PostPosted: Sat Aug 15, 2009 6:06 am     Reply with quote

Simple question:

I want to declare a - where "want" is more like "what the compiler takes"

Code:
Const char Table[8][7] = { "LED1 0", "LED1 1", "LED2 0", "LED2 1", "LED3 0", "LED3 1", "LED4 0", "LED4 1"};

logic tells me that:
Code:

Table[2][0] == 'L'

and
Code:
Table[5][4]=='3'

why is the second field [7] instead of [6]?

Table[8][x] should be equal to one of the strings, which are 6 chars long.

Position-{ 0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 }
char-----{ L - E - D - 1 - ' ' - 1 - ? - ? }

WTF?

I don't know if I explained my self correctly...

g
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CCS PCM 5.078 & CCS PCH 5.093
Gabriel



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PostPosted: Sat Aug 15, 2009 6:26 am     Reply with quote

by the way,

the purpose of this is to find one of those forementioned strings
inside a buffer, which is filled by my serial ISR.

thanks

g
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CCS PCM 5.078 & CCS PCH 5.093
Ttelmah
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PostPosted: Sat Aug 15, 2009 9:20 am     Reply with quote

The strings are _not_ 6 characters long.
A 'string' in 'C', is a _null terminated_ sequence of bytes. You need to count the 'null' as well.
Read a C reference book. This is nothing special to CCS.....

Best Wishes
Gabriel



Joined: 03 Aug 2009
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PostPosted: Sat Aug 15, 2009 6:01 pm     Reply with quote

hi,

thanks for the clarification...taking that into account... my problem still persists

i cant find it.. started a new thread...

thanks anyways...

gabriel
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CCS PCM 5.078 & CCS PCH 5.093
drolleman
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PostPosted: Sat Aug 15, 2009 6:23 pm     Reply with quote

Table[5][4]=='3' is not correct

Table[5][4]==' ' is a space

if you use the debugger you can use the watch on the varibles.
DROLLEMAN
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PostPosted: Sat Aug 15, 2009 6:29 pm     Reply with quote

also there is no such

Table[8][x]

you declared 8 items they are numberd 0 - 7

Table[7] would have "LED4 1" your last entry
Gabriel



Joined: 03 Aug 2009
Posts: 1067
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PostPosted: Sat Aug 15, 2009 6:48 pm     Reply with quote

hi

Quote:

Table[5][4]=='3' is not correct

Table[5][4]==' ' is a space

yeah.. I miscounted... I wrote the example code by hand...its not a copy paste....

Quote:

Table[8][x]

you declared 8 items they are numbered 0 - 7

Table[7] would have "LED4 1" your last entry

Again... miscounted...I wrote the post in a hurry... I had to go work and had people waiting for me....

Sorry for that...

Dumb mistake.... its not that way in my code..I check anyways just in case...

Thanks anyways...

Again sorry for the bad post...

Maybe you can help me in my new post.... I'm really stuck.

g
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CCS PCM 5.078 & CCS PCH 5.093
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