Microsoft KB Archive/156302

= INFO: STL Sample for the find Function =

Article ID: 156302

Article Last Modified on 12/1/2003

-

APPLIES TO

 The Standard C++ Library, when used with:  Microsoft Visual C++ 4.2 Professional Edition

 Microsoft Visual C++ 4.2 Enterprise Edition

 Microsoft Visual C++ 5.0 Learning Edition 

-

<div class="notice_section">

This article was previously published under Q156302

<div class="summary_section">

SUMMARY
The sample code below illustrates how to use the count_if, begin, and end STL function in Visual C++.

<div class="moreinformation_section">

Prototype
template<class InputIterator, class T> inline InputIterator find(InputIterator first,                         InputIterator last,                          const T& value) NOTE: The class/parameter names in the prototype do not match the version in the header file. Some have been modified to improve readability.

Description
The find algorithm locates the first element in the range [first, last) that matches value and returns the iterator positioned at the first matching element, or last + 1 if no such element exists.

Sample Code
////////////////////////////////////////////////////////////////////// // // Compile options needed: /GX // // find.cpp : Illustrates how to use the find function. // // Functions: // //  find  - Find the first element in a sequence that matches value. // // Written by Kalindi Sanghrajka // of Microsoft Product Support Services, // Software Core Developer Support. // Copyright (c) 1996 Microsoft Corporation. All rights reserved. //////////////////////////////////////////////////////////////////////

// disable warning C4786: symbol greater than 255 character, // okay to ignore
 * 1) pragma warning(disable: 4786)

using namespace std;
 * 1) include
 * 2) include

void main {   const int ARRAY_SIZE = 8 ; int IntArray[ARRAY_SIZE] = { 1, 2, 3, 4, 4, 5, 6, 7 } ;

int *location ;  // stores the position of the first // matching element.

int i ;

int value = 4 ;

// print content of IntArray cout << "IntArray { " ; for(i = 0; i < ARRAY_SIZE; i++) cout << IntArray[i] << ", " ; cout << " }" << endl ;

// Find the first element in the range [first, last + 1)   // that matches value.    location = find(IntArray, IntArray + ARRAY_SIZE, value) ;

//print the matching element if any was found if (location != IntArray + ARRAY_SIZE) // matching element found cout << "First element that matches " << value << " is at location " << location - IntArray << endl; else                                   // no matching element was // found cout << "The sequence does not contain any elements" << " with value " << value << endl ; } Output:

IntArray { 1, 2, 3, 4, 4, 5, 6, 7, }

First element that matches 4 is at location 3

<div class="references_section">