Does char array contain string?

Question

I have a text file and would like to check if it contains a string. The text file is stored in a char array: char buffer[512][128];.

Q1: Is it easier if I buffer it in one long array instead of a multidimensional array? Q2: How could I check whether the buffer contains the string char *s1 = "Hello world!";? I will need to search for multiple strings.

Are the multiple strings you're searching for constant, or user-supplied arguments? Are you looking to match any, or all, or some amount in between? strstr will work but we can optimize based on some of those requirements. — Chris Lutz
– Chris Lutz, Commented Dec 29, 2010 at 20:34
@Chris Lutz The strings are all different... I have an array with those. I would check if they exist in the old file, if not then i'd add them — JNK
– JNK, Commented Dec 29, 2010 at 20:38
Okay then. Since you need to check each one individually and add them if they exist, strstr is the way to go. — Chris Lutz
– Chris Lutz, Commented Dec 29, 2010 at 20:44

moinudin · Accepted Answer · 2010-12-29 20:30:14Z

12

It will be much easier to use a single 1D array.
strstr(buffer, s1) != null (once you've changed buffer into a 1D array)

answered Dec 29, 2010 at 20:30

moinudin

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martona · Accepted Answer · 2010-12-29 20:28:58Z

9

strstr

answered Dec 29, 2010 at 20:28

martona

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