STL_算法(20)_ 交换算法 swap_range(b, e, b2)

swap_ranges(b, e, b2)

注意：下列两种方法也是交换算法

1，容器的swap()成员函数  方法快

2，赋值操作

交换算法对所有容器适用

#include<iostream>
#include<algorithm>
#include<vector>
#include<deque>

using namespace std;

int main()
{
	vector<int> ivec;
	deque<int>ideq;

	for (int i = 1; i <= 9; i++)
		ivec.push_back(i);
	for (int i = 11; i <= 23; i++)
		ideq.push_back(i);

	for (vector<int>::iterator iter = ivec.begin(); iter != ivec.end(); iter++)
		cout << *iter << ' ';
	cout << endl;
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;

	swap_ranges(ivec.begin(), ivec.end(), ideq.begin());
	for (vector<int>::iterator iter = ivec.begin(); iter != ivec.end(); iter++)
		cout << *iter << ' ';
	cout << endl;
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;
	//

	system("pause");
	return 0;
}

#include<iostream>
#include<algorithm>
#include<vector>
#include<deque>

using namespace std;

int main()
{
	vector<int> ivec;
	deque<int>ideq;

	for (int i = 1; i <= 9; i++)
		ivec.push_back(i);
	for (int i = 11; i <= 23; i++)
		ideq.push_back(i);

	for (vector<int>::iterator iter = ivec.begin(); iter != ivec.end(); iter++)
		cout << *iter << ' ';
	cout << endl;
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;

	deque<int>::iterator pos;

	// 返回值为第二个区间没有交换过来的数
	pos = swap_ranges(ivec.begin(), ivec.end(), ideq.begin());
	for (vector<int>::iterator iter = ivec.begin(); iter != ivec.end(); iter++)
		cout << *iter << ' ';
	cout << endl;
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;

	if (pos != ideq.end())
	{
		cout << "第一个没有交换的数：" << *pos << endl;
	}

	swap_ranges(ideq.begin(), ideq.begin() + 3, ideq.rbegin());
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;

	//

	system("pause");
	return 0;
}

#include<iostream>
#include<algorithm>
#include<vector>
#include<deque>

using namespace std;

int main()
{
	vector<int> ivec1;
	vector<int> ivec2;

	ivec1.push_back(1);
	ivec1.push_back(2);
	ivec1.push_back(3);

	ivec2.push_back(10);
	ivec2.push_back(20);
	ivec2.push_back(30);

	// swap 比swap_ranges 函数比较快
	//ivec1.swap(ivec2);// swap 方法最快
	ivec1 = ivec2;// 此方法比较慢
	cout << ivec1.at(0) << ' ' << ivec1.at(1) << ' ' << ivec1.at(2) << endl;

	vector<int> ivec;
	deque<int>ideq;

	for (int i = 1; i <= 9; i++)
		ivec.push_back(i);
	for (int i = 11; i <= 23; i++)
		ideq.push_back(i);

	for (vector<int>::iterator iter = ivec.begin(); iter != ivec.end(); iter++)
		cout << *iter << ' ';
	cout << endl;
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;

	deque<int>::iterator pos;

	// 返回值为第二个区间没有交换过来的数
	pos = swap_ranges(ivec.begin(), ivec.end(), ideq.begin());// 此方法也比较慢，但是可以把两个不同的容器的数据进行交换，相同的也行
	for (vector<int>::iterator iter = ivec.begin(); iter != ivec.end(); iter++)
		cout << *iter << ' ';
	cout << endl;
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;

	if (pos != ideq.end())
	{
		cout << "第一个没有交换的数：" << *pos << endl;
	}

	swap_ranges(ideq.begin(), ideq.begin() + 3, ideq.rbegin());
	for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); iter++)
		cout << *iter << ' ';
	cout << endl;

	//

	system("pause");
	return 0;
}