removing magic numbers

include/element.hpp

@@ -4,7 +4,6 @@
 #include "globals.hpp"
 
 enum Direction {
-	NONE = 0,
 	UP = -2,
 	DOWN = 2,
 	LEFT = -1,
@@ -12,8 +11,7 @@ enum Direction {
 };
 
 struct Point {
-	int m_row;
-	int m_col;
+	int m_row, m_col;
 	char m_symbol;
 	enum Direction m_dir;
 	Point() : m_row(0), m_col(0), m_symbol('@') {}

include/globals.hpp

@@ -2,4 +2,8 @@
 #define GLOBALS_HPP
 #define ROW 11
 #define COL 11
+#define MAX_LEN (ROW * COL) + 3
+#define HEAD 0
+#define PREVIOUS_HEAD 1
+#define FRUIT 2
 #endif // GLOBALS_HPP

src/element.cpp

@@ -1,4 +1,5 @@
 #include "element.hpp"
+#include "globals.hpp"
 #include <cstring>
 #include <cstdlib>
 #include <ctime>
@@ -16,30 +17,21 @@ void Point::set_new_point(int row, int col) {
 }
 
 void determine_index_zero_pos(Point** buffer) {
-	buffer[1]->set_new_point(buffer[0]->m_row, buffer[0]->m_col);
+	auto& head = buffer[HEAD];
+	buffer[PREVIOUS_HEAD]->set_new_point(head->m_row, head->m_col);
 
-	if (buffer[0]->m_dir == LEFT) {
-		if (buffer[0]->m_col <= 0) buffer[0]->m_col = COL - 1;
-		else buffer[0]->m_col--;
-	}
-	else if (buffer[0]->m_dir == RIGHT) {
-		if (buffer[0]->m_col >= COL - 1) buffer[0]->m_col = 0;
-		else buffer[0]->m_col++;
-	}
-	else if (buffer[0]->m_dir == UP) {
-		if (buffer[0]->m_row <= 0) buffer[0]->m_row = ROW - 1;
-		else buffer[0]->m_row--;
-	}
-	else if (buffer[0]->m_dir == DOWN) {
-		if (buffer[0]->m_row >= ROW - 1) buffer[0]->m_row = 0;
-		else buffer[0]->m_row++;
+	switch(head->m_dir) {
+		case LEFT:  head->m_col = (head->m_col + COL - 1) % COL; break;
+		case RIGHT: head->m_col = (head->m_col + 1) % COL; 	break;
+		case UP:    head->m_row = (head->m_row + ROW - 1) % ROW; break;
+		case DOWN:  head->m_row = (head->m_row + 1) % ROW; 	break;
 	}
 }
 
 void move_tail_indicies(Point** buffer) {
 	if(_snake_size <= 3) return;
-	int new_row = buffer[1]->m_row;
-	int new_col = buffer[1]->m_col;
+	int new_row = buffer[PREVIOUS_HEAD]->m_row;
+	int new_col = buffer[PREVIOUS_HEAD]->m_col;
 	Point* last_point = buffer[_snake_size - 1];
 
 	memmove(buffer + 4, buffer + 3, (_snake_size - 4) * sizeof(Point*));
@@ -50,13 +42,12 @@ void move_tail_indicies(Point** buffer) {
 
 void on_fruit_eaten(Point (*board)[COL], Point** buffer) {
 	int row, col;
-	if(buffer[2]->m_row == buffer[0]->m_row && buffer[2]->m_col == buffer[0]->m_col) {
+	if(buffer[FRUIT]->m_row == buffer[HEAD]->m_row && buffer[FRUIT]->m_col == buffer[HEAD]->m_col) {
 		do {
 			row = (rand() % ROW);
 			col = (rand() % COL);
-		// } while (board[row][col] != nullptr);
 		} while (board[row][col].m_symbol != '.');
-		buffer[2]->set_new_point(row, col);
+		buffer[FRUIT]->set_new_point(row, col);
 		memmove(buffer + 4, buffer + 3, (_snake_size - 3) * sizeof(Point*));
 		buffer[3] = new Point { ROW, COL, '@' };
 		_score++;
@@ -67,7 +58,7 @@ void on_fruit_eaten(Point (*board)[COL], Point** buffer) {
 bool segment_overlap(Point** buffer) {
 	for(int i = 0; i < _snake_size; i++) {
 		if(buffer[i + 3] == nullptr) continue;
-		if(buffer[i + 3]->m_row == buffer[0]->m_row && buffer[i + 3]->m_col == buffer[0]->m_col) {
+		if(buffer[i + 3]->m_row == buffer[HEAD]->m_row && buffer[i + 3]->m_col == buffer[HEAD]->m_col) {
 			return true;
 		}
 	}

src/main.cpp

@@ -8,15 +8,14 @@
 int main () {	
 	std::srand(std::time(0));
 	Window window;
-	const int MAX_LEN = (ROW * COL) + 3;
 	bool running = true;
 	Point* buffer[MAX_LEN] = {}; // 2 for head, 1 for fruit, rest for tail
 
-	buffer[0] = new Point { ROW / 2, COL / 2, '*' }; // Head
-	buffer[1] = new Point { buffer[0]->m_row, buffer[0]->m_col, '.' };
-	buffer[2] = new Point { (rand() % ROW), (rand() % COL), 'o' }; // Fruit
+	buffer[HEAD] = new Point { ROW / 2, COL / 2, '*' }; // Head
+	buffer[PREVIOUS_HEAD] = new Point { buffer[HEAD]->m_row, buffer[HEAD]->m_col, '.' };
+	buffer[FRUIT] = new Point { (rand() % ROW), (rand() % COL), 'o' }; // Fruit
 
-	std::thread input_thread([&] { get_input(buffer[0]->m_dir, running ); } ); 
+	std::thread input_thread([&] { get_input(buffer[HEAD]->m_dir, running ); } ); 
 
 	while (running) {
 		on_fruit_eaten(window.m_board, buffer);

src/window.cpp

@@ -2,21 +2,17 @@
 #include <algorithm>
 #include <iostream>
 #include <chrono>
+#include <ranges>
 #include <thread>
 
 void Window::clear_display() {
-	for(auto &row : m_board) {
-		for(auto &val : row) {
-			val.m_symbol = '.';
-		}
+	for(auto [i, j] : std::ranges::views::cartesian_product(std::ranges::views::iota(0, ROW), std::ranges::views::iota(0, COL))) {
+		m_board[i][j].m_symbol = '.';
 	}
 }
 
 void Window::draw_display(int milliseconds) {
 	std::cout << "\033[H" << std::flush; // Clear screen
-	// for(auto row : ROW) {
-	//
-	// }
 	for(int i = 0; i < ROW; i++) {
 		for(int j = 0; j < COL; j++) {
 			if(m_board[i][j].m_symbol != '.') { std::cout << m_board[i][j].m_symbol << " "; }