chapter11-31.cpp

C++STL程序员开发指南

//文件名:CHAPTER11-31.cpp
#include <iostream>
#include <numeric>
#include <functional>
#include <vector>
#include <iterator>
using namespace std;
typedef vector < int > IntArray;
typedef ostream_iterator < int, char, char_traits<char> > IntOstreamIt;
void main ()
{
    IntOstreamIt itOstream(cout," ");
    IntArray rgI;    // Initialize the array
    for (int i=1; i<=10; i++) rgI.push_back(i);
    cout << "Array: ";    // Print the arrays
    copy(rgI.begin(),rgI.end(),itOstream);
    cout << endl;
    IntArray rgIresult(rgI.size());
    partial_sum(rgI.begin(),rgI.end(),rgIresult.begin());
    cout << "Array of partial sums: ";    // Print the array of partial sums
    copy(rgIresult.begin(),rgIresult.end(),itOstream);
    cout << endl;
    // Compute the partial product of the array
    partial_sum(rgI.begin(),rgI.end(),rgIresult.begin(),multiplies<int>());
    cout << "Array of partial products: ";    // Print the array of partial products
    partial_sum(rgIresult.begin(),rgIresult.end(),itOstream);
    cout << endl;
}