定义一个类对list进行封装,使得可以用下标对list进行操作:  1 #include 
    
      2 #include 
     
       3 #include 
      
        4 #include 
       
          5  6 using namespace std; 7  8 class Test 9 {10 public:11     Test();12     //~Test();13     Test(list
        
          strList);14     string &operator[](int n); //一般这里需要有&的,可以防止对象返回时去调用构造函数(因为return值,会有一个把值拷贝下来的过程)15 16 public:17     list
         
           m_strList;18 };19 20 21 Test::Test(list
          
            strList)22 {23 m_strList = strList;24 }25 26 //Test::~Test() //当定义析构函数,而没有实现时会报错.27 //{28 //29 //}30 31 string& Test::operator[](int n)32 {33 list
           
            ::iterator i = m_strList.begin();34 vector
            
             
              ::iterator> vecStrIter;35 for (; i != m_strList.end(); i++)36 {37 vecStrIter.push_back(i);38 }39 return *(vecStrIter[n]);40 }41 42 43 int main()44 {45 string str[4] = {"a", "li", "ba", "ba!"};46 list
              
                strList(str, str+4);47 Test test(strList);48 cout << test[1] << endl;49 return 0;50 }