Use of vector and list for C + + container objects

In <<c++ primer>> Fourth Edition exercise section 9.3.4 exercise 9.20 is a topic that writes a program to determine whether a vector<int> container contains elements with a list <int> containers are exactly the same. The test code is as follows:

1#include"stdafx.h"2#include <iostream>3#include <string>4#include <list>5#include <deque>6#include <vector>7 8 9 using namespacestd;Ten  One intMain () A { -vector<int>Vect; -list<int>Li; the     intVect_copy[] = {1,2,3,2,1,2,6}; -     intLi_copy[] = {2,4,6, Wu,7,0,2}; -Vect.insert (Vect.begin (), Vect_copy, vect_copy+7); -Li.insert (Li.begin (), li_copy,li_copy+7); +  -     if(Vect.size ()! =li.size ()) +     { Acout <<"it is different."<<Endl; at         return 0; -     } -  -      for(vector<int>::iterator begin = Vect.begin (); Begin! = Vect.end (); ++begin) -     { -         BOOLFlag =false; in          for(list<int>::iterator Begin_li = Li.begin (); Begin_li! = Li.end (); ++Begin_li) -         { to             if(*begin = = *Begin_li) +             { -Flag =true; the                 Continue; *             } $         }Panax Notoginseng         if(flag) -         { the  +         } A         Else the         { +cout << *begin <<"In Vect isn't in the list"<<Endl; -         } $     } $System"PAUSE"); -     return 0; -}

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The container object has an INSERT member function that is used to insert elements into the container, the first parameter is the insertion position, an iterator, and the following two parameters are the beginning and ending of the element iterator that needs to be inserted. Because the array name is a pointer, the array name is also passed directly here.

In addition, there are two loops that traverse vectors and lists, respectively.

The get element operation is as follows:

1#include"stdafx.h"2#include <vector>3#include <iostream>4 5 6 using namespacestd;7 8 9 intMain ()Ten { Onevector<int>Vect; A     intArry[] = {1,2,3, +, the, -}; -vector<int>Vect2; -Vect.insert (Vect.begin (), arry,arry+6); thecout << vect[0] <<Endl; -cout << Vect.front () <<Endl; -cout << *vect.begin () <<Endl; -cout << vect2[0] <<Endl; +System"PAUSE"); -     return 0; +}

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It is important to note that if the container object is empty, it must be judged first, otherwise the operation is undefined. The code above cannot be run.

Use of vector and list for C + + container objects