haiku.cpp

#include <complex>
#include <iostream>
#include <locale>

int main()
{
    auto const haiku = L"島々に　　　　灯をともしけり春の海　　　　　　　正岡子規";
    std::complex<int> c(3, 0), cp(c);
    std::complex<int> const r(-1, 0), i(0, 1);

    std::ios_base::sync_with_stdio(false);
    std::locale::global(std::locale(""));
    std::wcout.imbue(std::locale(""));

    for (auto a = 0; a < 21; a++, c += r) {
        if (!c.real()) {
            std::wcout << haiku[7 * c.real() + c.imag()] << std::endl;
            cp += i;
            c = cp;
        }
        std::wcout << haiku[7 * c.real() + c.imag()];
    }
}