STL Sample for the Predicate Version of the includes Function

• The Standard C++ Library included with: - Microsoft Visual C++, 32-bit Edition, version 4.2

SUMMARY

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

MORE INFORMATION

Required Header

   <algorithm>

Prototype

   template<class InputIterator1, class InputIterator2, class Compare>
   inline bool includes(InputIterator1 first1,
                        InputIterator1 last1,
                        InputIterator2 first2,
                        InputIterator2 last2,
                        Compare compare)

Description

The includes algorithm searches for one sequence of values in another sequence of values. includes returns true if every element in the range [first2 ..last2) is in the sequence [first1 .. last1). This version of includes assumes that both the sequences are sorted using the compare function.

//////////////////////////////////////////////////////////////////////
//
// Compile options needed: /GX
//
// includesP.cpp : Illustrates how to use the predicate version of
//                 includes function.
//
// Functions:
//
//    includes - Search for one sequence in another.
//    string_compare - Compare strings, return true if
//                       s1 < s2.
//
// 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

#include <iostream>
#include <algorithm>
#include <functional>
#include <string>
#include <vector>
#include <deque>

    return s1 < s2 ? 1 : 0;

void main()

    const int VECTOR_SIZE = 5 ;

    // Define a template class vector of strings
    typedef vector<string, allocator<string> > StringVector ;

    //Define an iterator for template class vector of strings
    typedef StringVector::iterator StringVectorIt ;

    // Define a template class deque of strings
    typedef deque<string, allocator<string> > StringDeque ;

    //Define an iterator for template class deque of strings
    typedef StringDeque::iterator StringDequeIt ;

    StringVector CartoonVector(VECTOR_SIZE) ;
    StringDeque CartoonDeque ;

    StringVectorIt start1, end1, it1 ;
    StringDequeIt start2, end2, it2 ;

    // Initialize vector Vector1
    CartoonVector[0] = "Aladdin" ;
    CartoonVector[1] = "Jasmine" ;
    CartoonVector[2] = "Mickey" ;
    CartoonVector[3] = "Minnie" ;
    CartoonVector[4] = "Goofy" ;

    start1 = CartoonVector.begin() ;  // location of first
                                      // element of CartoonVector

    end1 = CartoonVector.end() ;  // one past the location last
                                  // element of CartoonVector

    //Initialize list CartoonDeque
    CartoonDeque.push_back("Jasmine") ;
    CartoonDeque.push_back("Aladdin") ;
    CartoonDeque.push_back("Goofy") ;

    start2 = CartoonDeque.begin() ; // location of first
                                    // element of CartoonDeque

    end2 = CartoonDeque.end() ; // one past the location last
                                // element of CartoonDeque


    //sort CartoonVector and CartoonDeque alphabetically
    //includes requires the sequences
    //to be sorted.
    sort(start1, end1, string_compare) ;
    sort(start2, end2, string_compare) ;

    // print contents of CartoonVector and CartoonDeque
    cout << "CartoonVector { " ;
    for(it1 = start1; it1 != end1; it1++)
        cout << *it1 << ", " ;
    cout << " }\n" << endl ;
    cout << "CartoonDeque { " ;
    for(it2 = start2; it2 != end2; it2++)
        cout << *it2 << ", " ;
    cout << " }\n" << endl ;

    //Is CartoonDeque a subset of CartoonVector?
    if(includes(start1, end1, start2, end2, string_compare) )
        cout << "CartoonVector includes CartoonDeque"
        << endl ;
    else
        cout << "CartoonVector does not include CartoonDeque"
        << endl ;

}

CartoonVector { Aladdin, Goofy, Jasmine, Mickey, Minnie, }

CartoonDeque { Aladdin, Goofy, Jasmine, }

CartoonVector includes CartoonDeque

REFERENCES

Visual C++ Books On Line: Visual C++ Books:C/C++:Standard C++ Library Reference.