STL之迭代器

 1 #include <iostream>
 2 #include <list>
 3 #include <map>
 4 #include <deque>
 5 #include <list>
 6 #include <vector>
 7 using namespace std;
 8 
 9 int main()
10 {
11     vector<int> a;
12     deque<int>  b;  
13     list<int>   c;  
14     
15     a.push_back(1);
16     a.push_back(2); 
17     a.push_back(3); 
18     a.push_back(4); 
19     a.push_back(5); 
20     vector<int>::iterator it1 = a.end();    //end()指向最后一个的下一个，它是一个标记
21 
22     for(vector<int>::iterator it=a.begin(); it!=a.end();it++){
23         std::cout << *it << std::endl;
24     }   
25     vector<int>::iterator it2 = a.begin() + a.size()/2;
26     std::cout << "中间:" << *it2 << std::endl;  
27 
28     return 0;
29 }