algo/accu1.cpp

The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference
by Nicolai M. Josuttis, Addison-Wesley, 1999
© Copyright Nicolai M. Josuttis 1999


#include "algostuff.hpp"
using namespace std;

int main()
{
    vector<int> coll;

    INSERT_ELEMENTS(coll,1,9);
    PRINT_ELEMENTS(coll);

    // process sum of elements
    cout << "sum: "
         << accumulate (coll.begin(), coll.end(),    // range
                        0)                           // initial value
         << endl;

    // process sum of elements less 100
    cout << "sum: "
         << accumulate (coll.begin(), coll.end(),    // range
                        -100)                        // initial value
         << endl;

    // process product of elements
    cout << "product: "
         << accumulate (coll.begin(), coll.end(),    // range
                        1,                           // initial value
                        multiplies<int>())           // operation
         << endl;

    // process product of elements (use 0 as initial value)
    cout << "product: "
         << accumulate (coll.begin(), coll.end(),    // range
                        0,                           // initial value
                        multiplies<int>())           // operation
         << endl;
}