// Get number from user and print next 10 even numbers.
 
#include <iostream>
#include <cstdlib>
 
int get_int(std::string prompt="")
{
    std::cout << prompt << std::flush;
    if (int x; std::cin >> x)
        return x;
    throw std::runtime_error("get_int: 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_int("Enter a number> ")), 2);
}

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LTM=

-3