#include <iostream> #include <cmath> #include <vector> #include <iomanip> using namespace std; const int SIZE_X = 20; const int SIZE_Y = 20; int a[SIZE_X][SIZE_Y]; const double PI = acos(-1); double get_dist(double x1, double y1, double x2, double y2) { return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)); } struct Direction { double dist; double dir_x, dir_y; Direction(double d, double x, double y) { dist = d; double in_d = get_dist(x, y, 0.0, 0.0); // если делим на ноль - ошибка if (in_d < 1e-9) throw(0); dir_x = x / in_d; dir_y = y / in_d; cout << "dir "<< dir_x << ' ' << dir_y << ' ' << in_d << endl; } }; int main() { double r = 4; double x = 10, y = 10; double mouse_x = 3; double mouse_y = 4; double v = 0.5; for (int I = 0; I < 20; I++) { cout <<setprecision(1) << fixed << x << ' ' << y << endl; vector<Direction> dir; for (int i = -20; i <= 20; i++) { double X = r / 20 * i; double Y = sqrt(r * r - X * X); // cout << X << ' ' << Y << endl; a[(int) round(x + X)][(int) round(y + Y)] = 1; a[(int) round(x + X)][(int) round(y - Y)] = 1; dir.push_back( Direction(get_dist(x + X, y + Y, mouse_x, mouse_y), X, Y)); dir.push_back( Direction(get_dist(x + X, y - Y, mouse_x, mouse_y), X, -Y)); } int max_index = 0; cout << max_index << endl; // если вектор для выбора направления пуст - выдаем ошибку if (dir.size() == 0) throw(0); for (int i = 0; i < (int) dir.size(); i++) { if (dir[max_index].dist > dir[i].dist) max_index = i; } cout << dir[max_index].dir_x << ' ' << dir[max_index].dir_y << endl; x += dir[max_index].dir_x * v; y += dir[max_index].dir_y * v; } return 0; for (int i = 0; i < SIZE_X; i++) { for (int j = 0; j < SIZE_Y; j++) { cout << a[i][j] << ' '; } cout << endl; } return 0; }
Standard input is empty
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