fruit: fixed bug where fruit could generate under tail

src/element.cpp

@@ -8,22 +8,24 @@ void Point::set_new_point(int row, int col, int dir) {
 	m_direction = dir;
 }
 
-Fruit::Fruit() {
-	std::srand(std::time(0));
-	m_point.set_new_point((rand() % 9), (rand() % 9), 0);
+Fruit::Fruit(char (&board)[ROW][COL]) {
+	int row = (rand() % ROW);
+	int col = (rand() % COL);
+	m_point.set_new_point(row, col, 0);
 }
 
 void Fruit::get_new_pos(char (&board)[ROW][COL], Head &head, int &score) {
+	int row, col;
 	if(m_point.m_row == head.m_head.m_row && m_point.m_col == head.m_head.m_col) {
-		m_point.set_new_point((rand() % 9), (rand() % 9), 0);
+		do {
+			row = (rand() % ROW);
+			col = (rand() % COL);
+		} while (board[row][col] != '.');
+		m_point.set_new_point(row, col, 0);
 		score++;
 	}
 }
 
-Head::Head() {
-	m_head.set_new_point(5, 5, 2);
-}
-
 void Head::get_new_pos() {
 	if (m_head.m_direction == -1) {
 		if (m_head.m_col <= 0) m_head.m_col = COL - 1;
@@ -40,11 +42,6 @@ void Head::get_new_pos() {
 	}
 }
 
-Body::Body() {
-	m_score = 0;
-	m_collision = false;
-}
-
 void Body::check_collision(Head &head) {
 	for(int i = 0; i < m_body.size(); i++) {
 		if(m_body.at(i).m_tail_pos.m_row == head.m_head.m_row) {