chapter11-33.cpp

C++STL程序员开发指南

//文件名:CHAPTER11-33.cpp
#include <iostream>
#include <numeric>
#include <functional>
#include <vector>
#include <iterator>
using namespace std;
typedef vector < int > IntegerArray;
typedef ostream_iterator < int, char, char_traits<char> > IntOstreamIt;
void main ()
{
    IntOstreamIt itOstream(cout," ");
    IntegerArray rgIA;
    rgIA.push_back(5661); 
    rgIA.push_back(7456);
    rgIA.push_back(10995);
    rgIA.push_back(17019); 
    rgIA.push_back(24394); 
    rgIA.push_back(30376); 
    rgIA.push_back(35758); 
    copy(rgIA.begin(),rgIA.end(),itOstream);
    cout << endl;
    IntegerArray rgDifferences(7);
    IntegerArray::iterator itDifferences = rgDifferences.begin();
    adjacent_difference(rgIA.begin(),rgIA.end(),itDifferences);
    cout << "The adjacent differences are: ";
    copy(rgDifferences.begin()+1,rgDifferences.end(),itOstream);
    cout << endl;
    IntegerArray rgGT(6);
    IntegerArray::iterator itGT = rgGT.begin();
    adjacent_difference(rgDifferences.begin()+1,rgDifferences.end(),itGT,less<int>());
    cout << "Which adjacent distances are greater:" << endl
         << "(If you have [a,b,c], then you have [1,0] if a>b and b<=c)"<< endl;
    copy(rgGT.begin()+1,rgGT.end(),itOstream);
    cout << endl;
}