fruit: fixed bug where fruit could generate under tail

include/element.hpp

@@ -4,6 +4,12 @@
 #include <vector>
 #include "globals.hpp"
 
+struct Point;
+struct Head;
+struct Tail;
+struct Body;
+struct Fruit;
+
 struct Point {
     int m_row;
     int m_col;
@@ -11,12 +17,11 @@ struct Point {
     Point() {}
     Point(int x, int y) : m_row(x), m_col(y) {}
     Point(int x, int y, int dir) : m_row(x), m_col(y), m_direction(dir) {}
-
     void set_new_point(int row, int col, int dir);
 };
 
 struct Head {
-	Head();
+	Head() : m_head(5, 5, 2) {};
 	Point m_head;
 	Point m_previous_head;
 	void get_new_pos();
@@ -28,7 +33,7 @@ struct Tail {
 };
 
 struct Body {
-	Body();
+	Body() : m_score(0), m_collision(false) {};
 	std::vector<Tail> m_body;
 	int m_score;
 	bool m_collision;
@@ -38,7 +43,7 @@ struct Body {
 };
 
 struct Fruit {
-	Fruit();
+	Fruit(char (&board)[ROW][COL]);
 	Point m_point;
 	void get_new_pos(char (&board)[ROW][COL], Head &head, int &score);
 };