partial_sort_copy
从一个源区的元素复制到目标数组中的源元素。小于或其他的谓词指定二进制的位置顺序。
template<class InputIterator, class RandomAccessIterator>
RandomAccessIterator partial_sort_copy(
InputIterator _First1,
InputIterator _Last1,
RandomAccessIterator _First2,
RandomAccessIterator _Last2
);
template<class InputIterator, class RandomAccessIterator, class BinaryPredicate>
RandomAccessIterator partial_sort_copy(
InputIterator _First1,
InputIterator _Last1,
RandomAccessIterator _First2,
RandomAccessIterator _Last2,
BinaryPredicate _Comp
);
参数
_First1
在源范围第一个元素的位置寻址的输入迭代器。_Last1
寻址最终元素的输入迭代器在源区一位置。_First2
处理第一元素位置的随机访问迭代器。排序的目标范围。_Last2
寻址最终元素的随机访问迭代器的位置顺序的目标范围。_Comp
定义将满足的条件的用户定义的谓词函数对象，如果两个元素将采用为相等。 binary 谓词采用两个参数并返回 true，在满足和 false，当没有足够。
返回值
解决在目标范围一位置的随机访问迭代器元素。从源区插入的最后一个元素外。
备注
源和目标范围不能重叠并且必须是有效的；所有指针必须 dereferenceable，在每个序列中最后位置必须是可访问的。从开始递增。
二进制谓词必须提供强弱顺序，因此不等效元素排序，但是，等效元素不是。 如果两者均不小于，其他两个元素等效的小下比，但不必须相等。
示例
// alg_partial_sort_copy.cpp
// compile with: /EHsc
#include <vector>
#include <list>
#include <algorithm>
#include <functional>
#include <iostream>
int main() {
using namespace std;
vector<int> v1, v2;
list<int> list1;
vector<int>::iterator iter1, iter2;
list<int>::iterator list1_Iter, list1_inIter;
int i;
for (i = 0; i <= 9; i++)
v1.push_back(i);
random_shuffle(v1.begin(), v1.end());
list1.push_back(60);
list1.push_back(50);
list1.push_back(20);
list1.push_back(30);
list1.push_back(40);
list1.push_back(10);
cout << "Vector v1 = ( " ;
for (iter1 = v1.begin(); iter1 != v1.end(); iter1++)
cout << *iter1 << " ";
cout << ")" << endl;
cout << "List list1 = ( " ;
for (list1_Iter = list1.begin();
list1_Iter!= list1.end();
list1_Iter++)
cout << *list1_Iter << " ";
cout << ")" << endl;
// Copying a partially sorted copy of list1 into v1
vector<int>::iterator result1;
result1 = partial_sort_copy(list1.begin(), list1.end(),
v1.begin(), v1.begin() + 3);
cout << "List list1 Vector v1 = ( " ;
for (iter1 = v1.begin() ; iter1 != v1.end() ; iter1++)
cout << *iter1 << " ";
cout << ")" << endl;
cout << "The first v1 element one position beyond"
<< "\n the last L 1 element inserted was " << *result1
<< "." << endl;
// Copying a partially sorted copy of list1 into v2
int ii;
for (ii = 0; ii <= 9; ii++)
v2.push_back(ii);
random_shuffle(v2.begin(), v2.end());
vector<int>::iterator result2;
result2 = partial_sort_copy(list1.begin(), list1.end(),
v2.begin(), v2.begin() + 6);
cout << "List list1 into Vector v2 = ( " ;
for (iter2 = v2.begin() ; iter2 != v2.end(); iter2++)
cout << *iter2 << " ";
cout << ")" << endl;
cout << "The first v2 element one position beyond"
<< "\n the last L 1 element inserted was " << *result2
<< "." << endl;
}
示例输出
Vector v1 = ( 8 1 9 2 0 5 7 3 4 6 )
List list1 = ( 60 50 20 30 40 10 )
List list1 Vector v1 = ( 10 20 30 2 0 5 7 3 4 6 )
The first v1 element one position beyond
the last L 1 element inserted was 2.
List list1 into Vector v2 = ( 10 20 30 40 50 60 1 8 5 2 )
The first v2 element one position beyond
the last L 1 element inserted was 1.
要求
标头： <算法>
命名空间: std