Re: Array Search?

From:
"Kasya" <kasya_13@hotmail.com>
Newsgroups:
microsoft.public.vc.language
Date:
Fri, 29 Feb 2008 11:16:05 +0400
Message-ID:
<5D503655-49DE-409F-8BAA-558E7CD4E61F@microsoft.com>
Thanks!

"Vladimir Grigoriev" <vlad.moscow@mail.ru> wrote in message
news:u$qv8SheIHA.3940@TK2MSFTNGP05.phx.gbl...

First of all your declaration of the array is incorrect.
char array[7] declares a character array of 7 characters.
Secondly, it is better to use the C++ class string for storing character
strings.
However if you use a C-alike array in C++ then you can use std::qsort
function to sort your array and then to use binary search for the sorted
array.

Your code will look something like that

#include <cstdlib>

#include <cstring>

int fcmp( const void *a, const void *b )

{

   return( std::strcmp( static_cast<const char *>( a ),

   static_cast<const char *>( b ) ) );

}

int main( int argc, char *argv[] )

{

   std::size_t const array_size = 7;

   std::size_t const string_size = 12;

   char array[array_size][string_size] = {

       "Programming", "Language", "C++", "hello C++", "world", "hello
world", "hello" };

   for ( int i = 0; i < array_size; ++i )

       std::cout << array[i] << "; ";

   std::cout << std::endl;

   std::qsort( static_cast<void *>( array ), array_size, string_size,
fcmp );

   for ( int i = 0; i < array_size; ++i )

       std::cout << array[i] << "; ";

   std::cout << std::endl;

   char *ptarget = 0; // or char const *ptarget if string should not be
chaged

   ptarget = static_cast<char *>( std::bsearch( static_cast<const void
*>( "hello C++" ),

                                                         static_cast<const
void *>( array ),

                                                         array_size,
string_size, fcmp ) );

   if ( ptarget )

       std::cout << "The target string is " << ptarget << std::endl;

Vladimri Grigoriev

"Kasya" <kasya_13@hotmail.com> wrote in message
news:FD887E12-E799-47C4-98B3-750E9D675C49@microsoft.com...

Hello,

How can I search Text in Array and find which index is that array in C++?
e.g
char array[7]

array[0] = "Programming";
array[1] = "Language";
array[2] = "C++";
array[3] = "hello C++";
array[4] = "world";
array[5] = "hello world";
array[6] = "hello";

Now how can I find "hello C++" in "array" and find which index is it?

Thanks in Advance!

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