#include <iostream>
#include "wolf.h"
using namespace std;

void wolf::decide(int *dx, int *dy) const
{
        struct keystroke {
                char c;
                int dx;   //horizontal motion
                int dy;   //vertical motion
        };

        static const keystroke a[] {
                {'h',   -1,    0},   //left
                {'j',    0,    1},   //down
                {'k',    0,   -1},   //up
                {'l',    1,    0}    //right
        };

        if (const char k {key()}) {             //If a key was pressed,
                for (const auto& stroke: a) {   //search for it.
                        if (k == stroke.c) {
                                *dx = stroke.dx;
                                *dy = stroke.dy;
                                return;
                        }
                }
        }

        *dx = 0;
        *dy = 0;
}