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Find string in another string

 
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overmindx



Joined: 06 Oct 2008
Posts: 43

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Find string in another string
PostPosted: Thu Oct 20, 2011 1:24 am     Reply with quote
Hi everybody,

Is there a function to determine if a string is part of another string. I tried strcmp but it only determines if the string are exactly alike.
e.g.
Code:

str1 = "STRING ONE";
str2 = "STRING ONE";

So this will return zero to indicate that they are equal.

There is also strncmp which will only read a specified number of bytes.
e.g.
Code:

str1 = "STRING ONE";
str2 = "STRING";

So this will return zero to indicate the similarities of str1 and str2.

What I want is to determine if a string is part of string regardless its position to the other string
e.g.
Code:

str1 = "STRING NUMBER ONE";
str2 = "NUMBER";

This would still return an indication that str2 is part of str1.

Is there a way to do this? Thanks in advance.
RF_Developer



Joined: 07 Feb 2011
Posts: 839

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PostPosted: Thu Oct 20, 2011 1:49 am     Reply with quote
Take a look at strstr() it may help you.

This though is the sort of basic function thats often given as an exercise for the reader in typical C textbooks, so its very easy, and instructive, to roll your own.

RF Developer
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