Use the list::list STL function in Visual C++
This article illustrates how to use the list::list
STL function in Visual C++.
Original product version: Visual C++
Original KB number: 158091
Required header
<list>
Prototype
explicit list(const A& al = A());
explicit list(size_type n, const T& v = T(), const A& al = A());
list(const list& x);
list(const_iterator first, const_iterator last, const A& al = A());
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
The first constructor specifies an empty initial controlled sequence. The second constructor specifies a repetition of n
elements of value x
. The third constructor specifies a copy of the sequence controlled by x
. The last constructor specifies the sequence (first
, last
). All constructors store the allocator object al
, or for the copy constructor, x.get_allocator()
, in allocator and initialize the controlled sequence.
Sample code
//////////////////////////////////////////////////////////////////////
// Compile options needed: -GX
// list.cpp : demonstrates the different constructors for list<T>
// Functions:
// list::list
// Copyright (c) 1996 Microsoft Corporation. All rights reserved.
//////////////////////////////////////////////////////////////////////
#include <list>
#include <string>
#include <iostream>
#if _MSC_VER > 1020 // if VC++ version is > 4.2
using namespace std; // std c++ libs implemented in std
#endif
typedef list<string, allocator<string> > LISTSTR;
// Try each of the four constructors
void main()
{
LISTSTR::iterator i;
LISTSTR test; // default constructor
test.insert(test.end(), "one");
test.insert(test.end(), "two");
LISTSTR test2(test); // construct from another list
LISTSTR test3(3, "three"); // add several <T>'s
LISTSTR test4(++test3.begin(), // add part of another list
test3.end());
// Print them all out
// one two
for (i = test.begin(); i != test.end(); ++i)
cout << *i << " ";
cout << endl;
// one two
for (i = test2.begin(); i != test2.end(); ++i)
cout << *i << " ";
cout << endl;
// three three three
for (i = test3.begin(); i != test3.end(); ++i)
cout << *i << " ";
cout << endl;
// three three
for (i = test4.begin(); i != test4.end(); ++i)
cout << *i << " ";
cout << endl;
}
Program output is:
one two
one two
three three three
three three
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