| list::clear |
public member function |
Clear content
All the elements in the list container are dropped: their destructors are called, and then they are removed from the list container, leaving it with a size of 0.
Parameters
none
Return value
none
Example
// clearing lists
#include <iostream>
#include <list>
using namespace std;
int main ()
{
list<int> mylist;
list<int>::iterator it;
mylist.push_back (100);
mylist.push_back (200);
mylist.push_back (300);
cout << "mylist contains:";
for (it=mylist.begin(); it!=mylist.end(); ++it)
cout << " " << *it;
mylist.clear();
mylist.push_back (1101);
mylist.push_back (2202);
cout << "\nmylist contains:";
for (it=mylist.begin(); it!=mylist.end(); ++it)
cout << " " << *it;
cout << endl;
return 0;
}
|
Output:
mylist contains: 100 200 300
mylist contains: 1101 2202
|
Complexity
Linear on size (destructors).
See also
| list::remove | Remove elements with specific value (public member function) |
| list::empty | Test whether container is empty (public member function) |
