chapter8-20.cpp

来自「C++STL程序员开发指南」· C++ 代码 · 共 48 行

//文件名:CHAPTER8-20.cpp
#include <iostream>
#include <list>
#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
#endif
typedef list<char >  CHARLIST;
void print_contents (CHARLIST  list, char*);
void main()
{
    CHARLIST  a; // 定义一个list变量
    if(a.empty())      //判断容器是否为空
        cout<<"a is empty"<<endl;
    else
        cout<<"a is not empty"<<endl;
    //inset A, B, C and D  to a
    a.push_back('A');
    a.push_back('B');
    a.push_back('C');
    a.push_back('D');
    //check again whether a is empty
    if(a.empty())
        cout<<"a is empty"<<endl;
    else
        cout<<"a is not empty"<<endl;
    //print out the contents
    print_contents (a,"a");  //调用打印函数，把deuqe的内容打印出来
    cout <<"The first element of a is  " <<a.front()<<endl;// 使用数组的形式显示容器中的内容
	CHARLIST::iterator Startlist=a.begin(); 
    cout <<"The first element of a is  " <<*Startlist <<endl; // 使用迭代器显示容器中的内容
    cout <<"The last element of a is  " <<a.back() <<endl; // 使用数组形式显示容器中的内容
	CHARLIST::iterator Endlist=a.end(); 
    cout <<"The last element of a is  " <<*Endlist<<endl; // 使用迭代器显示容器中的内容
}
//打印list成员函数
void print_contents (CHARLIST  list, char *name)
{
    CHARLIST::iterator plist;  //定义迭代器
    cout <<"The contents of "<< name <<" : ";
    for(plist = list.begin();
        plist != list.end();
        plist++)
        {
            cout << *plist <<" " ; // 使用迭代器技术显示容器中的内容
        }
    cout<<endl;
}