cb40a_c++_STL_算法_交换swap_ranges

cb40a_c++_STL_算法_交换swap_ranges
swap_ranges(b,e,b2);
如果两个容器的数据数量不一致时，只交换一部分数据，
a里面3个，b里面5个，则只会交换3个，b里面还有两个不变

注意：下列两种方法也是交换算法
1.容器的swap()成员函数
2.赋值操作

 /*cb40a_c++_STL_算法_交换swap_ranges
 swap_ranges(b,e,b2);
 如果两个容器的数据数量不一致时，只交换一部分数据，
 a里面3个，b里面5个，则只会交换3个，b里面还有两个不变

 注意：下列两种方法也是交换算法
 1.容器的swap()成员函数
 2.赋值操作

 */

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

 using namespace std;

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

     for (int i = ; i <= ; ++i)
         ivec.push_back(i);
     for (int i = ; i <= ; ++i)
         ideq.push_back(i);
     cout << "vector数据" << endl;
     for (vector<int> ::iterator iter = ivec.begin(); iter != ivec.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;
     cout << "deque的数据" << endl;
     for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;
     cout << "vector与deque的数据交换" << endl;

     swap_ranges(ivec.begin(), ivec.end(), ideq.begin());

     //再次显示：
     cout << "vector数据" << endl;
     for (vector<int> ::iterator iter = ivec.begin(); iter != ivec.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;
     cout << "deque的数据" << endl;
     for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;

     deque<int>::iterator pos;
     pos = swap_ranges(ivec.begin(), ivec.end(), ideq.begin());
     if (pos != ideq.end())
     {
         cout << "还存在没有交换完的数据： 位置是：" << *pos << endl;
     }

     //再次显示：
     cout << "vector数据" << endl;
     for (vector<int> ::iterator iter = ivec.begin(); iter != ivec.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;
     cout << "deque的数据" << endl;
     for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;

     cout << "ideq里面：前面的三个数据和后面的三个数据相互交换" << endl;
     swap_ranges(ideq.begin(), ideq.begin()+ , ideq.rbegin());
     for (deque<int>::iterator iter = ideq.begin(); iter != ideq.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;

     vector<int>ivec1;
     vector<int>ivec2;
     ivec1.push_back();
     ivec1.push_back();
     ivec1.push_back();

     ivec2.push_back();
     ivec2.push_back();
     ivec2.push_back();

     cout << "交换前vector1的数据：" << endl;
     for (vector<int> ::iterator iter = ivec1.begin(); iter != ivec1.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;
     cout << "交换前vector2的数据：" << endl;

     for (vector<int> ::iterator iter = ivec2.begin(); iter != ivec2.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;

     ivec1.swap(ivec2);
     cout << "ivec1.swap(ivec2);实际交换的是指针---,速度快。" << endl;

     cout << "交换后vector1的数据：" << endl;
     for (vector<int> ::iterator iter = ivec1.begin(); iter != ivec1.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;
     cout << "交换后vector2的数据：" << endl;

     for (vector<int> ::iterator iter = ivec2.begin(); iter != ivec2.end(); ++iter)
         cout << *iter << ' ';
     cout << endl;

     return ;
 }