The sample code below illustrates how to use the
list::insert STL function in Visual C++.
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Required header
<list>
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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);
The class/parameter names in the prototype may not match the
version in the header file. Some have been modified to improve readability.
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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).
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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
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For more information about list::insert, visit the following
Microsoft Developer Network (MSDN) Web site:
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