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defining length of array

 
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dave the blade
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defining length of array
PostPosted: Wed Nov 02, 2005 4:57 am     Reply with quote

Hi gents and ladies, ver 3.234, is there a way to define the length of an array to capture a_to_d readings after compilation of the program, in other words by entering a value from a keypad that tells the program the length of the array.
Cheers dave
MikeValencia



Joined: 04 Aug 2004
Posts: 238
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PostPosted: Wed Nov 02, 2005 7:08 am     Reply with quote

I never tried it in the PIC environment, but i'll try to explain it the way i understand it to work:

Arrays are defined during compile-time, so you can't really define the length on-the-fly.

I think the solution you'd be looking for is to define a pointer to a char:

char *my_ptr;

Then you do a malloc() for the length you want.

e.g.
my_ptr = malloc(...);

After that, then you can address the contents accordingly via:
my_ptr[x] = 0x20; // for example
or
*(my_ptr + x) = 0x20;

I think the two statements above are equal, but I am not sure if CCS supports both.

OR

The easiest would be to just define an array of your worst-case longest length.
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