gistfile1.txt

#include <cstdlib>
#include <cmath>
#include <iostream>
#include <complex>
#include <vector>

int main()
{
    size_t w = 120;
    size_t h = 40;
    std::vector<char> framebuffer(w * h);
    size_t num_iters = 100;
    double bound = 2.0;
    for (size_t x = 0; x < w; ++x)
    {
        for (size_t y = 0; y < h; ++y)
        {
            std::complex<double> c{-2.0 + 4.0 / w * x, -1.0 + 2.0 / h * y};
            std::complex<double> z0;
            for (size_t i = 0; i < num_iters; ++i)
            {
                auto z1 = std::pow(z0, 2.0) + c;
                z0 = z1;
                if (std::abs(z1) > bound)
                {
                    framebuffer[w * y + x] = ' ';
                    break;
                }
                else
                    framebuffer[w * y + x] = '*';
            }
        }
    }
    for (size_t y = 0; y < h; ++y)
    {
        for (size_t x = 0; x < w; ++x)
        {
            std::cout << framebuffer[w * y + x];
        }
        std::cout << "\n";
    }
}