straight-selection.cpp


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#include <iostream>
#include <vector>
#include <ostream>

template<class T> void
straight_selection(std::vector<T> &array)
{
    for (int i = 0; i < array.size(); ++i)
    {
        int k = i;
        int x = array[i];
        for (int j = i; j < array.size(); ++j)
        {
            if (array[j] < x)
            {
                k = j;
                x = array[j];
            }
        }
        array[k] = array[i];
        array[i] = x;
    }
}

template<class T> std::ostream &
operator<<(std::ostream &stream, std::vector<T> &v)
{
    if (v.size() == 0) stream << "{ }";
    
    stream << "array = { ";
    for (int i = 0; i < int(v.size()) - 1; ++i)
        stream << v[i] << ", ";

    stream << v.back() << " }";
    return stream;
}

int
main()
{
    std::vector<int> array = { 2, 7, 12, 30, 11, 4, 12, 5, 20 };
    std::cout << array << std::endl;
    straight_selection(array);
    std::cout << array << std::endl;

    return 0;
}