{
    //std::vector<int> vec{ 1, 5, 7, 2, 8, 4 };
    std::vector<double> vec;
    vec.push_back(12.2);

    vec.push_back(2);
    vec.push_back(1);

    printf("original\n");
    for (auto it = vec.begin(); it != vec.end(); ++it)
        printf("%f,", *it);
    printf("\n\n");

    std::sort(vec.begin(), vec.end());
    printf("ascending order\n");
    for (auto it = vec.begin(); it != vec.end(); ++it)
        printf("%f ", *it);
    printf("\n");

    std::sort(vec.rbegin(), vec.rend());
    printf("descending order\n");
    for (auto it = vec.begin(); it != vec.end(); ++it)
        printf("%f ", *it);
    printf("\n");

    return;
}


================================================
original
12.200000,2.000000,1.000000,

ascending order
1.000000 2.000000 12.200000
descending order
12.200000 2.000000 1.000000