transform.cpp

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#include <algorithm>    // for transform
#include <functional>   // for multiplies
#include <deque>        // for deque
#include <iostream>     // for cout, endl
#include <iomanip>      // for setw
 
 
int main ()
{
    typedef std::deque<int, std::allocator<int> > Deque;
 
    // Initialize a deque with an array of integers.
    const Deque::value_type a [] = { 99, 264, 126, 330, 132 };
    const Deque::value_type b [] = { 280, 105, 220, 84, 210 };
 
    Deque d1 (a, a + sizeof a / sizeof *a);
    Deque d2 (b, b + sizeof b / sizeof *b);
 
    // Print the original values.
    std::cout << "The following pairs of numbers: \n     ";
    Deque::iterator i1;
    for (i1 = d1.begin(); i1 != d1.end(); ++i1)
        std::cout << std::setw (6) << *i1 << " ";
 
    std::cout << "\n     ";
    for (i1 = d2.begin(); i1 != d2.end(); ++i1)
        std::cout << std::setw (6) << *i1 << " ";
 
    // transform the numbers in one sequence to their factorials
    // and store the results in another sequence
    std::transform (d1.begin (), d1.end (), d2.begin (), d1.begin (),
                    std::multiplies<int>());
 
    // Display the results.
    std::cout << "\n\nHave the products: \n     ";
    for (i1 = d1.begin (); i1 != d1.end (); ++i1)
        std::cout << std::setw (6) << *i1 << " ";
 
    std::cout << std::endl;
 
    return 0;
}