Int sequence : generate « STL Algorithms Modifying sequence operations « C++

Home
C++
1.Bitset
2.Class
3.Console
4.Data Structure
5.Data Type
6.Deque
7.Development
8.File
9.Function
10.Generic
11.Language
12.List
13.Map Multimap
14.Overload
15.Pointer
16.Qt
17.Queue Stack
18.Set Multiset
19.STL Algorithms Binary search
20.STL Algorithms Heap
21.STL Algorithms Helper
22.STL Algorithms Iterator
23.STL Algorithms Merge
24.STL Algorithms Min Max
25.STL Algorithms Modifying sequence operations
26.STL Algorithms Non modifying sequence operations
27.STL Algorithms Sorting
28.STL Basics
29.String
30.Valarray
31.Vector
C / ANSI-C
C Tutorial
C++ Tutorial
Visual C++ .NET
C++ » STL Algorithms Modifying sequence operations » generateScreenshots 
Int sequence
  
 

/* The following code example is taken from the book
 * "The C++ Standard Library - A Tutorial and Reference"
 * by Nicolai M. Josuttis, Addison-Wesley, 1999
 *
 * (C) Copyright Nicolai M. Josuttis 1999.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
#include <iostream>
#include <list>
#include <algorithm>

using namespace std;

/* PRINT_ELEMENTS()
 * - prints optional C-string optcstr followed by
 * - all elements of the collection coll
 * - separated by spaces
 */
template <class T>
inline void PRINT_ELEMENTS (const T& coll, const char* optcstr="")
{
    typename T::const_iterator pos;

    std::cout << optcstr;
    for (pos=coll.begin(); pos!=coll.end(); ++pos) {
        std::cout << *pos << ' ';
    }
    std::cout << std::endl;
}


class IntSequence {
  private:
    int value;
  public:
    // constructor
    IntSequence (int initialValue: value(initialValue) {
    }

    // ''function call''
    int operator() () {
        return value++;
    }
};

int main()
{
    list<int> coll;

    // insert values from 1 to 9
    generate_n (back_inserter(coll),    // start
                9,                      // number of elements
                IntSequence(1));        // generates values

    PRINT_ELEMENTS(coll);

    // replace second to last element but one with values starting at 42
    generate (++coll.begin(),           // start
              --coll.end(),             // end
              IntSequence(42));         // generates values

    PRINT_ELEMENTS(coll);
}

/* 
1 2 3 4 5 6 7 8 9
1 42 43 44 45 46 47 48 9

 */        
    
  
Related examples in the same category
1.Provide predicate for std::generate
2.Illustrating the generic generate algorithm: Fill vector1 with 1, 4, 9, 16, ..., 100
3.Use std::generate to fill elements in a vector
4.Use generate to insert five random numbers into a list
5.Generate a sequence.
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.