DouKaku?

#include <iostream>
#include <vector>
#include <string>
#include <iterator>
#include <algorithm>

struct point
{
    int x;
    int y;

    point& operator += (const point& other)
    {
        x += other.x;
        y += other.y;
        return *this;
    }
};

static const point vs[] =
{
    {  1,  0 }, {  0,  1 }, {  1,  0 }, {  0,  1 },
    { -1,  0 }, {  0,  1 }, { -1,  0 }, {  0, -1 },
    { -1,  0 }, {  0, -1 }, {  1,  0 }, {  0, -1 }
};

void doukaku291(const std::string& s)
{
    std::vector<std::string> v(s.size() * 3 + 1, std::string(s.size() * 3 + 1, ' '));
    point p = { s.size(), 0 };
    for(int i = 0; i < 12; ++i)
    {
        for(std::string::const_iterator it = s.begin(); it != s.end(); ++it)
        {
            v[p.y][p.x] = *it;
            p += vs[i];
        }
    }
    std::copy(v.begin(), v.end(), std::ostream_iterator<std::string>(std::cout, "¥n"));
}

int main(int argc, char* argv[])
{
    doukaku291("doukaku");

    return 0;
}