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2010-05-25T14:21:17Z

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2010-05-25T10:29:34Z

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==Demonstrating the STL list erase function==

<source lang="cpp">#include <iostream>
#include <cassert>
#include <list>
#include <string>
#include <algorithm> // for find
using namespace std;

int main()
{
string s("remembering");
list<char> list1(s.begin(), s.end());
list<char>::iterator j;
j = find(list1.begin(), list1.end(), "i");
list1.erase(j++);
list<char>::iterator i;
for (i = list1.begin(); i != list1.end(); ++i)
cout << *i << " ";
cout << "\n\n\n";
// j now points to the "n":
list1.erase(j++);
for (i = list1.begin(); i != list1.end(); ++i)
cout << *i << " ";
cout << "\n\n\n";
// j now points to the "g":
list1.erase(j++);
for (i = list1.begin(); i != list1.end(); ++i)
cout << *i << " ";
cout << "\n\n\n";
list1.erase(list1.begin());
for (i = list1.begin(); i != list1.end(); ++i)
cout << *i << " ";
cout << "\n\n\n";
list1.erase(list1.begin());
for (i = list1.begin(); i != list1.end(); ++i)
cout << *i << " ";
cout << "\n\n\n";
return 0;
}</source>
<pre class=codeResult>r e m e m b e r n g

r e m e m b e r g

r e m e m b e r

e m e m b e r

m e m b e r</pre>

==erase from begin()==

<source lang="cpp">#include <list>
#include <iostream>
using namespace std;
typedef list<int> LISTINT;
int main(void)
{
LISTINT listOne;
LISTINT listAnother;
LISTINT::iterator i;
listOne.push_front (2);
listOne.push_front (1);
listOne.push_back (3);
listAnother.push_front(4);
listAnother.assign(listOne.begin(), listOne.end());
for (i = listAnother.begin(); i != listAnother.end(); ++i)
cout << *i << " ";
cout << endl;
listAnother.assign(4, 1);
for (i = listAnother.begin(); i != listAnother.end(); ++i)
cout << *i << " ";
cout << endl;
listAnother.erase(listAnother.begin());
for (i = listAnother.begin(); i != listAnother.end(); ++i)
cout << *i << " ";
cout << endl;
}</source>

==Erasing Elements in a list==

<source lang="cpp">#include <list>
#include <iostream>
using namespace std;
void PrintListContents (const list <int>& listInput);
int main ()
{
std::list <int> listIntegers;
listIntegers.push_front (4);
listIntegers.push_front (3);
// Store an iterator obtained in using the "insert" function
list <int>::iterator iElementValueTwo;
iElementValueTwo = listIntegers.insert (listIntegers.begin (), 2);
listIntegers.push_front (1);
listIntegers.push_front (0);
// Insert an element at the end...
listIntegers.push_back (5);
cout << "Initial contents of the list:" << endl;
PrintListContents (listIntegers);
listIntegers.erase (listIntegers.begin (), iElementValueTwo);
cout << "Contents after erasing a range of elements:" << endl;
PrintListContents (listIntegers);
cout<<"Contents after erasing element ""<<*iElementValueTwo<<"":"<<endl;
listIntegers.erase (iElementValueTwo);
PrintListContents (listIntegers);
listIntegers.erase (listIntegers.begin (), listIntegers.end ());
cout << "Contents after erasing a range:" << endl;
PrintListContents (listIntegers);
return 0;
}
void PrintListContents (const list <int>& listInput)
{
if (listInput.size () > 0)
{
std::list <int>::const_iterator i;
for ( i = listInput.begin (); i != listInput.end (); ++ i )
cout << *i << " ";
}
else
cout << "List is empty!" << endl;
}</source>

==listAnother.erase(listAnother.begin(), listAnother.end());==

<source lang="cpp">#include <list>
#include <iostream>
using namespace std;
typedef list<int> LISTINT;
int main(void)
{
LISTINT listOne;
LISTINT listAnother;
LISTINT::iterator i;
listOne.push_front (2);
listOne.push_front (1);
listOne.push_back (3);
listAnother.push_front(4);
listAnother.assign(listOne.begin(), listOne.end());
for (i = listAnother.begin(); i != listAnother.end(); ++i)
cout << *i << " ";
cout << endl;
listAnother.assign(4, 1);
for (i = listAnother.begin(); i != listAnother.end(); ++i)
cout << *i << " ";
cout << endl;
listAnother.erase(listAnother.begin());
for (i = listAnother.begin(); i != listAnother.end(); ++i)
cout << *i << " ";
cout << endl;
listAnother.erase(listAnother.begin(), listAnother.end());
if (listAnother.empty())
cout << "All gone\n";
}</source>

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в 14:21, 25 мая 2010

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