Solved

strstr

Posted on 2001-06-15
5
750 Views
Last Modified: 2008-02-26
could you guys explain what does strstr function do?
thanks
0
Comment
Question by:zunera
  • 3
5 Comments
 
LVL 30

Expert Comment

by:Axter
ID: 6196524
char *strstr(const char *string, const char *strCharSet)

The strstr function returns a pointer to the first occurrence of strCharSet in string.
0
 
LVL 30

Expert Comment

by:Axter
ID: 6196525
Example

/* STRSTR.C */

#include <string.h>
#include <stdio.h>

char str[] =    "lazy";
char string[] = "The quick brown dog jumps over the lazy fox";
char fmt1[] =   "         1         2         3         4         5";
char fmt2[] =   "12345678901234567890123456789012345678901234567890";

void main( void )
{
   char *pdest;
   int  result;
   printf( "String to be searched:\n\t%s\n", string );
   printf( "\t%s\n\t%s\n\n", fmt1, fmt2 );
   pdest = strstr( string, str );
   result = pdest - string + 1;
   if( pdest != NULL )
      printf( "%s found at position %d\n\n", str, result );
   else
      printf( "%s not found\n", str );
}


Output

String to be searched:
   The quick brown dog jumps over the lazy fox
            1         2         3         4         5
   12345678901234567890123456789012345678901234567890

lazy found at position 36

0
 
LVL 32

Accepted Solution

by:
jhance earned 20 total points
ID: 6196528
strstr locates a SUBSTRING within another string.

Let's say you have:

char *str1 = "This is only a test";
char *p;

and you do:

p = strstr(str1, "only");

p will point to the "o" in only.  If, however, you did:

p = strstr(str1, "ONLY");

p will be NULL since the string "ONLY" does not appear in the string str1.
0
 
LVL 30

Expert Comment

by:Axter
ID: 6196534
I just copied and pasted this from MSN help document.
See following link for more info.
http://msdn.microsoft.com/library/devprods/vs6/visualc/vccore/_crt_strstr.2c_.wcsstr.2c_._mbsstr.htm
0
 

Author Comment

by:zunera
ID: 6196612
Answer is very simple and clear, great thanks
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Container Orchestration platforms empower organizations to scale their apps at an exceptional rate. This is the reason numerous innovation-driven companies are moving apps to an appropriated datacenter wide platform that empowers them to scale at a …
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

929 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

7 Experts available now in Live!

Get 1:1 Help Now