Solved

strstr

Posted on 2001-06-15
5
753 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

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

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

Written by John Humphreys C++ Threading and the POSIX Library This article will cover the basic information that you need to know in order to make use of the POSIX threading library available for C and C++ on UNIX and most Linux systems.   [s…
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 be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

809 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