Microsoft KB Archive/157038

= STL Sample for the Predicate Version of min_element Function =

Article ID: 157038

Article Last Modified on 12/2/2003

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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 

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This article was previously published under Q157038

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SUMMARY
The sample code below illustrates how to use the predicate version of the min_element STL function in Visual C++.

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Prototype
template<class InputIterator, class Compare> inline InputIterator min_element(InputIterator first,                                InputIterator last,                                 Compare compare) NOTE: The class/parameter names in the prototype do not match the original version in the header file. They have been modified to improve readability.

Description
The min_element algorithm returns the location of the minimum element in the sequence [first, last).

The predicate version of min_element uses compare function for comparisons.

Sample Code
////////////////////////////////////////////////////////////////////// // // Compile options needed: /GX // // min_element.cpp : Illustrates how to use the predicates version //                  of the min_element function. // // Functions: // //   min_element : Return the minimum element within a range. // // 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
 * 3) include
 * 4) include

void main {   const int VECTOR_SIZE = 8 ;

// Define a template class vector of int typedef vector<int, allocator > IntVector ;

//Define an iterator for template class vector of strings typedef IntVector::iterator IntVectorIt ;

IntVector Numbers(VECTOR_SIZE) ;

IntVectorIt start, end, it, location ;

// Initialize vector Numbers Numbers[0] = 4 ; Numbers[1] = 10; Numbers[2] = 10 ; Numbers[3] = 30 ; Numbers[4] = 69 ; Numbers[5] = 70 ; Numbers[6] = 96 ; Numbers[7] = 100;

start = Numbers.begin ;  // location of first // element of Numbers

end = Numbers.end ;      // one past the location // last element of Numbers

// print content of Numbers cout << "Numbers { " ; for(it = start; it != end; it++) cout << *it << " " ; cout << " }\n" << endl ;

// return the minimum element in the Numbers location = min_element(start, end, less ) ;

cout << "The minimum element in Numbers is: " << *location << endl ; } Program Output is: <pre class="fixed_text">Numbers { 4 10 10 30 69 70 96 100 } The minimum element in Numbers is: 4

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