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Marc
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| help for c language |
 Posted: Tue Jul 17, 2007 2:10 pm |
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I need to define an array of strings and to initialize it with certain strings
There is a sintax error. Which?
char *pan_ids[5];
pan_ids[5]={"aaaa", "bbbb", "cccc", "dddd", "eeee"};
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Bill Boucher
Joined: 04 Feb 2005
Posts: 34
Location: Chatham,ON,CA
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| Posted: Tue Jul 17, 2007 6:10 pm |
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I don't think an array or string variable can be a pointer (as indicated by preceding *).
Also, "pan_ids[5]" can only hold 1 string such as "aaaa" at a time. If you want it to hold 5 strings, then you need a multi-dimensional array such as "pan_ids [5] [5]".
Try
| Code: | char pan_ids[5][5]={"aaaa", "bbbb", "cccc", "dddd", "eeee"};
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If the strings are fixed (won't change) then stick "const" in your declaration to store the string data in program memory space instead of ram. |
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kender
Joined: 09 Aug 2004
Posts: 768
Location: Silicon Valley
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| Posted: Tue Jul 17, 2007 7:45 pm |
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| Bill Boucher wrote: | | I don't think an array or string variable can be a pointer (as indicated by preceding *). |
I think, Marc is trying to create an array of pointers to strings. There's no conceptual difference between an array variable and a pointer to the 1st member in the array.
| Marc wrote: | | Code: | | pan_ids[5]={"aaaa", "bbbb", "cccc", "dddd", "eeee"}; |
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This will not work for 3 reasons.
1. You are trying to assign the whole array to a single slot.
2. ... and this slot is out of bounds of the array. The largest index is four (4).
3. The assignment syntax array[]={<member list>} works only during the initialization of the array. Afterwards you need to assign each array memer individually. If only need to initialize the array, you can do this (note that C counts the members in the initialization list, so there is no number in the brackets):
| Code: | | char* pan_ids[] = {"aaaa", "bbbb", "cccc", "dddd", "eeee"}; |
And finally, please read Kernigan & Ritchie. You will do yourself a huge favor. http://www.cs.bell-labs.com/cm/cs/cbook/
_________________
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Last edited by kender on Wed Jul 18, 2007 7:11 pm; edited 1 time in total |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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