chapter7-5.cpp

C++STL程序员开发指南

//文件名:CHAPTER7-5.cpp
#include <iostream>
#include <deque>
#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
#endif
typedef deque<char >  CHARDEQUE;
void print_contents (CHARDEQUE  deque, char*);
void main()
{    //create a  with  A, B, C and D
    CHARDEQUE  a;
    a.push_back('A');
    a.push_back('B');
    a.push_back('C');
    a.push_back('D');
    //print out the contents
    print_contents (a,"a");
    cout <<"max_size of a is " <<a.max_size() <<endl;
    cout <<"size of a is " <<a.size() <<endl;
   //let us increase the size to 10
    // and set the new elements to be 'X'
    a.resize(10,'X');
    print_contents (a,"a");
    cout <<"size of a is " <<a.size() <<endl;
    //let us resize it to 5
    a.resize(5);
    print_contents (a,"a");
    cout <<"size of a is " <<a.size() <<endl;
    cout <<"max_size of a is still " <<a.max_size() <<endl;
    }
//function to print the contents of deque
void print_contents (CHARDEQUE  deque, char *name)
{
    CHARDEQUE::iterator pdeque;
    cout <<"The contents of "<< name <<" : ";
        for(pdeque = deque.begin(); pdeque != deque.end(); pdeque++)
    {        cout << *pdeque <<" " ;    }
        cout<<endl;
}