Q158092: STL Sample for the List::insert Function

Article: Q158092
Product(s): Microsoft C Compiler
Version(s): 4.2,5.0,6.0
Operating System(s): 
Keyword(s): kbcode kbVC420 kbVC500 kbVC600 kbDSupport
Last Modified: 29-APR-2002

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The information in this article applies to:

- The Standard C++ Library, used with:
   - Microsoft Visual C++, 32-bit Enterprise Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Professional Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
   - Microsoft Visual C++.NET (2002) 
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SUMMARY
=======

The sample code below illustrates how to use the list::insert STL function in
Visual C++.

MORE INFORMATION
================

Required Header
---------------

     <list>

Prototype
---------

     iterator insert(iterator it, const T& x = T());
     void insert(iterator it, size_type n, const T& x);
     void insert(iterator it, const_iterator first, const_iterator last);
     void insert(iterator it, const T *first, const T *last);

NOTE: The class/parameter names in the prototype may not match the version in the
header file. Some have been modified to improve readability.

Description
-----------

Each of the member functions inserts, after the element pointed to by it in the
controlled sequence, a sequence specified by the remaining operands. The first
member function inserts a single element with value x and returns an iterator
that points to the newly inserted element. The second member function inserts a
repetition of n elements of value x. The last two member functions insert the
sequence [first, last).

Sample Code
-----------

     ////////////////////////////////////////////////////////////////////// 
     // 
     // Compile options needed: -GX
     // 
     // insert.cpp :  Shows the various ways to insert elements into a
     //               list<T>.
     // 
     // Functions:
     // 
     //    list::insert
     // 
     // Written by Andrew Bradnan
     // Copyright (c) 1996 Microsoft Corporation. All rights reserved.
     ////////////////////////////////////////////////////////////////////// 

     #include <list>
     #include <iostream>
     using namespace std;

  #if _MSC_VER > 1020   // if VC++ version is > 4.2
     using namespace std;  // std c++ libs implemented in std
     #endif

     typedef list<int, allocator<int> > LISTINT;

     void main()
     {
         int rgTest1[] = {5,6,7};
         int rgTest2[] = {10,11,12};

         LISTINT listInt;
         LISTINT listAnother;
         LISTINT::iterator i;

         // Insert one at a time
         listInt.insert (listInt.begin(), 2);
         listInt.insert (listInt.begin(), 1);
         listInt.insert (listInt.end(), 3);

         // 1 2 3
         for (i = listInt.begin(); i != listInt.end(); ++i)
             cout << *i << " ";
         cout << endl;

         // Insert 3 fours
         listInt.insert (listInt.end(), 3, 4);

         // 1 2 3 4 4 4
         for (i = listInt.begin(); i != listInt.end(); ++i)
             cout << *i << " ";
         cout << endl;

         // Insert an array in there
         listInt.insert (listInt.end(), rgTest1, rgTest1 + 3);

         // 1 2 3 4 4 4 5 6 7
         for (i = listInt.begin(); i != listInt.end(); ++i)
             cout << *i << " ";
         cout << endl;

         // Insert another LISTINT
         listAnother.insert (listAnother.begin(), rgTest2, rgTest2+3);
         listInt.insert (listInt.end(), listAnother.begin(),
         listAnother.end());

         // 1 2 3 4 4 4 5 6 7 10 11 12
         for (i = listInt.begin(); i != listInt.end(); ++i)
             cout << *i << " ";
         cout << endl;
     }

Program Output is as follows:

  1 2 3
  1 2 3 4 4 4
  1 2 3 4 4 4 5 6 7
  1 2 3 4 4 4 5 6 7 10 11 12

REFERENCES
==========

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

Additional query words: STL STLSample list::insert

======================================================================
Keywords          : kbcode kbVC420 kbVC500 kbVC600 kbDSupport 
Technology        : kbVCsearch kbAudDeveloper kbVCLibrary
Version           : :4.2,5.0,6.0
Issue type        : kbinfo

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