成员函数unique()可以保证链表容器中连续两个对象具有唯一性,即要求链表容器中的任意连续对象元素值是不同的,但不能保证链表容器中所有对象的唯一性。例子:
#include "stdafx.h"
#include <iostream>
#include <list>
#include <algorithm>
using namespace std;
int_tmain(int argc, _TCHAR* argv[])
{
list<int> c1;
not_equal_to<int> mypred;
c1.push_back(-10);
c1.push_back(10);
c1.push_back(10);
c1.push_back(20);
c1.push_back(20);
c1.push_back(-10);
cout<<"c1="<<endl;
copy(c1.begin(),c1.end(),ostream_iterator<int>(cout,""));
cout<<endl;
list<int> c2 = c1;
c2.unique();
cout<<"After removing successive duplicate elements,c2="<<endl;
copy(c2.begin(),c2.end(),ostream_iterator<int>(cout,""));
cout<<endl;
list<int> c3 = c2;
c3.unique(mypred); //删除与c2链表第一个元素不同的对象元素
cout<<"After removing successive unequal elements,c3="<<endl;
copy(c3.begin(),c3.end(),ostream_iterator<int>(cout,""));
cout<<endl;
return 0;
}
执行结果: