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Pointer to the middle of an array

 
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Futterama



Joined: 17 Oct 2005
Posts: 98

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Pointer to the middle of an array
PostPosted: Fri Aug 01, 2014 6:13 am     Reply with quote
Hi forum,

I have a char array as ring buffer for receiving serial data.
I'm trying to locate some text in the buffer, so I would compare it to another array of char. I would use the strcmp function for comparison, and it takes pointers to the arrays, which is fine. But I don't want to start comparing from the beginning of the ring buffer array, so how do I create a pointer to someplace in the middle of the array?

Best regards,
Martin
asmboy



Joined: 20 Nov 2007
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Location: albany ny

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PostPosted: Fri Aug 01, 2014 6:38 am     Reply with quote
POST your code!!
this is a practical forum -
not a blind debating society Very Happy Very Happy Very Happy
Futterama



Joined: 17 Oct 2005
Posts: 98

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PostPosted: Fri Aug 01, 2014 6:47 am     Reply with quote
I just solved it myself, actually just by reading some regular C code example from here: http://www.eskimo.com/~scs/cclass/notes/sx10b.html

Code:
char array[] = {"This is a test"}; // The array with text data
char *ptr; // The pointer

ptr = &array[5]; // Set pointer to point at somewhere inside the array
printf("%c", *ptr); // Print the char from the array which the pointer points to


Sweet :-)
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