c++ STL迭代器实例

Love The Way You Lie 2023-02-11 07:15 2阅读 0赞

1、vector

#include <iostream>
    #include <vector>
    
    using namespace std;
    
    int main(int argc, char* argv[])
    {
        // Create and populate the vector
    	vector<int> vecTemp;
    	for (int i = 0; i<6; i++)
    	{
    		vecTemp.push_back(i);
    	}
    
        // Display contents of vector
    	cout <<"Original deque: ";    
    	vector<int>::iterator it;
    	for (it = vecTemp.begin(); it!=vecTemp.end(); it++)
    	{
    		cout <<*it <<" ";
    	}
    
    	return 0;
    }
    
    /*
    输出结果：
    Original deque: 0 1 2 3 4 5
    */

2、deque

#include <iostream>
    #include <deque>
    
    using namespace std;
    
    int main(int argc, char* argv[])
    {
    	// Create and populate the deque
    	deque<int> dequeTemp;
    	for (int i = 0; i<6; i++)
    	{
    		dequeTemp.push_back(i);
    	}
    
    	// Display contents of deque
    	cout <<"Original deque: ";
    	deque<int>::iterator it;
    	for (it = dequeTemp.begin(); it != dequeTemp.end(); it++)
    	{
    		cout <<*it <<" ";
    	}
    	cout <<endl;
    
    	return 0;
    }
    /*
    输出结果：
    Original deque: 0 1 2 3 4 5
    */

3、list

#include <iostream>
    #include <list>
    
    using namespace std;
    
    int main(int argc, char* argv[])
    {
    	// Create and populate the list
    	list<int> listTemp;
    	for (int i = 0; i<6; i++)
    	{
    		listTemp.push_back(i);
    	}
    
    	// Display contents of list
    	cout << "Original list: ";
    	list<int>::iterator it;
    	for (it = listTemp.begin(); it != listTemp.end(); it++)
    	{
    		cout << *it << " ";
    	}
    	cout << endl;
    
    	// Insert five 9 into the list
    	list<int>::iterator itStart = listTemp.begin();
    	listTemp.insert(itStart,5,9);
    
    	// Display the result
    	cout << "Result of list: ";
    	for (it = listTemp.begin(); it != listTemp.end(); it++)
    	{
    		cout << *it << " ";
    	}
    	cout << endl;
    
    	return 0;
    }
    /*
    输出结果：
    Original list: 0 1 2 3 4 5
    Result of list: 9 9 9 9 9 0 1 2 3 4 5
    */

4、set

#include <iostream>
    #include <set>
    
    using namespace std;
    
    int main(int argc, char* argv[])
    {
    	// Create and populate the set
    	set<char> setTemp;
    	for (int i = 0; i<6; i++)
    	{
    		setTemp.insert('F'-i);
    	}
    
    	// Display contents of set
    	cout <<"Original set: ";
    	set<char>::iterator it;
    	for (it = setTemp.begin(); it != setTemp.end(); it++)
    	{
    		cout <<*it <<" ";
    	}
    	cout <<endl;
    
    	return 0;
    }
    /*
    输出结果：
    Original set: A B C D E F
    */

5、map

#include <iostream>
    #include <map>
    
    using namespace std;
    
    typedef map<int, char> MyMap;
    
    int main(int argc, char* argv[])
    {
    	// Create and populate the map
    	MyMap mapTemp;
    	for (int i = 0; i<6; i++)
    	{
    		mapTemp[i] = ('F'-i);
    	}
    
    	// Display contents of map
    	cout <<"Original map: " <<endl;
    	MyMap::iterator it;
    	for (it = mapTemp.begin(); it != mapTemp.end(); it++)
    	{
    		cout << (*it).first << " --> ";
    		cout << (*it).second << std::endl;
    	}
    	cout <<endl;
    
    	return 0;
    }
    /*
    输出结果：
    Original map:
    0 --> F
    1 --> E
    2 --> D
    3 --> C
    4 --> B
    5 --> A
    */