XRUr7K - Online C++ Compiler & Debugging Tool

// Get number from user and print next 10 even numbers. (1.01)

#include <iostream>
#include <cstdlib>

template<typename T>
T get_input(const std::string& prompt={})
{
    std::cout << prompt << std::flush;
    if (T x; std::cin >> x)
        return x;
    throw std::runtime_error("get_input: Bad input");
}

int ceil_to_even(int x)
{
    return x + std::abs(x % 2);
}

void put_iota(int count, int start, int step)
{
    for (int i = 0; i < count; i++)
        std::cout << start + i*step << ' ';
    std::cout << std::endl;
}

int main()
{
    put_iota(10, ceil_to_even(get_input<int>("Enter a number> ")), 2);
}