C++ STL 算法：删除算法（3）unique、unique_copy

1、unique(b,e)//把重复的元素删掉，只保留一个

unique(ilist.begin(),ilist.end());

2、unique(b,e,p)//符合p条件的删掉

pos = unique(ilist.begin(), ilist.end(), greater<int>());//删掉比前一个数小的元素

3、unique_copy(b1,e1,b2)

unique_copy(ilist.begin(),ilist.end(),ostream_iterator<int>(cout, " "));

4、unique_copy(b1,e1,b2,p)

bool differenceOne(int elem1, int elem2)
{
return elem1 + 1 == elem2 || elem1 - 1 == elem2;
}

unique_copy(ilist.begin(), ilist.end(),ostream_iterator<int>(cout, " "),differenceOne);//相邻的删掉