标签:style blog http color os 2014
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partition
------------------------------------------------------------------------//所有被 pred 判定为 true 的元素,都被放到前段
//被 pred 判定为 false 的元素,都被放到后段
//不保证保留相对位置
template <class BidirectionalIterator, class Predicate>
BidirectionalIterator partition(BidirectionalIterator first,
BidirectionalIterator last, Predicate pred) {
while (true) {
while (true)
if (first == last)
return first;
else if (pred(*first))
++first;
else
break;
--last;
while (true)
if (first == last)
return first;
else if (!pred(*last))
--last;
else
break;
iter_swap(first, last);
++first;
}
}int A[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
const int N = sizeof(A)/sizeof(int);
partition(A, A + N,
compose1(bind2nd(equal_to<int>(), 0),
bind2nd(modulus<int>(), 2)));
copy(A, A + N, ostream_iterator<int>(cout, " "));
// The output is "10 2 8 4 6 5 7 3 9 1". STL 源码剖析 算法 stl_algo.h -- partition,布布扣,bubuko.com
STL 源码剖析 算法 stl_algo.h -- partition
标签:style blog http color os 2014
原文地址:http://blog.csdn.net/zhengsenlie/article/details/37932305