issues solved. all 6 of them.

main.cpp

@@ -1,9 +1,14 @@
 #include "snake.h"
+#include <ctime>
+
+int main(int argc, char *argv[])
+{
+    srand((unsigned)time(nullptr));
 
-int main(int argc, char *argv[]) {
     thread input_thread(input_handler);
-    thread game_thread(game_play);   
+    thread game_thread(game_play);
+
     input_thread.join();
     game_thread.join();
-return 0;
+    return 0;
 }

snake.h

@@ -4,98 +4,289 @@
 #include <thread>
 #include <stdlib.h>
 #include <termios.h>
-#include <unistd.h> // for system clear
+#include <unistd.h>
 #include <map>
 #include <deque>
 #include <algorithm>
+#include <utility>
+#include <fstream>
 using namespace std;
 using std::chrono::system_clock;
-using namespace std::this_thread;
-char direction='r';
 
+constexpr int BOARD_SIZE = 10; // Board size
 
-void input_handler(){
-    // change terminal settings
+char direction = 'r';
+
+// Input handler (runs in a separate thread)
+void input_handler()
+{
     struct termios oldt, newt;
     tcgetattr(STDIN_FILENO, &oldt);
     newt = oldt;
-    // turn off canonical mode and echo
-    newt.c_lflag &= ~(ICANON | ECHO);
+    newt.c_lflag &= ~(ICANON | ECHO); // turn off canonical mode and echo
     tcsetattr(STDIN_FILENO, TCSANOW, &newt);
+
     map<char, char> keymap = {{'d', 'r'}, {'a', 'l'}, {'w', 'u'}, {'s', 'd'}, {'q', 'q'}};
-    while (true) {
+    while (true)
+    {
         char input = getchar();
-        if (keymap.find(input) != keymap.end()) {
-            // This now correctly modifies the single, shared 'direction' variable
+        if (keymap.find(input) != keymap.end())
+        {
             direction = keymap[input];
-        }else if (input == 'q'){
+        }
+        else if (input == 'q')
+        {
+            tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
             exit(0);
         }
-        // You could add an exit condition here, e.g., if (input == 'q') break;
+        else if (input == 'p')
+        {
+            if (direction != 'P')
+                direction = 'P'; // pause
+            else
+                direction = 'r'; // resume moving right or previous direction
+        }
     }
     tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
 }
 
-
-void render_game(int size, deque<pair<int, int>> &snake, pair<int, int> food){
-    for(size_t i=0;i<size;i++){
-        for(size_t j=0;j<size;j++){
-            if (i == food.first && j == food.second){
+// Render the board
+void render_game(int size, deque<pair<int, int>> &snake, pair<int, int> food, pair<int, int> poison, int score)
+{
+    for (int i = 0; i < size; ++i)
+    {
+        for (int j = 0; j < size; ++j)
+        {
+            if (i == food.first && j == food.second)
+            {
                 cout << "🍎";
-            }else if (find(snake.begin(), snake.end(), make_pair(int(i), int(j))) != snake.end()) {
+            }
+            else if (i == poison.first && j == poison.second)
+            {
+                cout << "☠️";
+            }
+            else if (find(snake.begin(), snake.end(), make_pair(i, j)) != snake.end())
+            {
                 cout << "🐍";
-            }else{
+            }
+            else
+            {
                 cout << "⬜";
             }
+        }
+        cout << '\n';
     }
-    cout << endl;
+    cout << "Length: " << snake.size() << "  Score: " << score << "\n";
 }
+
+// Compute next head (wraps around)
+pair<int, int> get_next_head(pair<int, int> current, char direction)
+{
+    pair<int, int> next;
+    if (direction == 'r')
+    {
+        next = make_pair(current.first, (current.second + 1) % BOARD_SIZE);
+    }
+    else if (direction == 'l')
+    {
+        next = make_pair(current.first, current.second == 0 ? BOARD_SIZE - 1 : current.second - 1);
+    }
+    else if (direction == 'd')
+    {
+        next = make_pair((current.first + 1) % BOARD_SIZE, current.second);
+    }
+    else
+    { // 'u'
+        next = make_pair(current.first == 0 ? BOARD_SIZE - 1 : current.first - 1, current.second);
+    }
+    return next;
 }
 
-pair<int,int> get_next_head(pair<int,int> current, char direction){
-    pair<int, int> next; 
-    if(direction =='r'){
-        next = make_pair(current.first,(current.second+1) % 10);
-    }else if (direction=='l')
+// Spawn food at a location not occupied by the snake
+pair<int, int> spawn_food(const deque<pair<int, int>> &snake)
+{
+    vector<pair<int, int>> freeCells;
+    for (int i = 0; i < BOARD_SIZE; ++i)
     {
-        next = make_pair(current.first, current.second==0?9:current.second-1);
-    }else if(direction =='d'){
-            next = make_pair((current.first+1)%10,current.second);
-        }else if (direction=='u'){
-            next = make_pair(current.first==0?9:current.first-1, current.second);
+        for (int j = 0; j < BOARD_SIZE; ++j)
+        {
+            pair<int, int> pos = make_pair(i, j);
+            if (find(snake.begin(), snake.end(), pos) == snake.end())
+            {
+                freeCells.push_back(pos);
+            }
         }
-    return next;
-
+    }
+
+    if (freeCells.empty())
+        return make_pair(-1, -1); // board full
+
+    int idx = rand() % freeCells.size();
+    return freeCells[idx];
+}
+// ✅ Save score to file
+void save_score(int score)
+{
+    ofstream file("scores.txt", ios::app); // append mode
+    if (file.is_open())
+    {
+        file << score << "\n";
+        file.close();
+    }
 }
 
+// ✅ Load scores and return top 10
+vector<int> load_top_scores()
+{
+    ifstream file("scores.txt");
+    vector<int> scores;
+    int s;
 
+    while (file >> s)
+    {
+        scores.push_back(s);
+    }
+    file.close();
+
+    // Sort descending
+    sort(scores.begin(), scores.end(), greater<int>());
+
+    // Keep only top 10
+    if (scores.size() > 10)
+    {
+        scores.resize(10);
+    }
 
-void game_play(){
+    return scores;
+}
+
+void game_play()
+{
     system("clear");
     deque<pair<int, int>> snake;
-    snake.push_back(make_pair(0,0));
-
-    pair<int, int> food = make_pair(rand() % 10, rand() % 10);
-    for(pair<int, int> head=make_pair(0,1);; head = get_next_head(head, direction)){
-        // send the cursor to the top
-        cout << "\033[H";
-        // check self collision
-        if (find(snake.begin(), snake.end(), head) != snake.end()) {
+    snake.push_back(make_pair(0, 0)); // starting segment
+
+    pair<int, int> food = spawn_food(snake);
+    pair<int, int> poison = spawn_food(snake); // spawn initial poison
+
+    int score = 0;
+    int level = 1;       // starting level
+    int baseDelay = 500; // initial delay in ms
+
+    while (true)
+    {
+        pair<int, int> currentHead = snake.back();
+        pair<int, int> nextHead = get_next_head(currentHead, direction);
+
+        cout << "\033[H"; // move cursor to top-left
+
+        bool willGrow = (nextHead == food);
+        bool collision = false;
+
+        // ✅ Pause logic
+        if (direction == 'P')
+        {
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+            continue; // skip movement, freeze game
+        }
+
+        if (willGrow)
+        {
+            if (find(snake.begin(), snake.end(), nextHead) != snake.end())
+                collision = true;
+        }
+        else
+        {
+            auto itStart = snake.begin();
+            if (!snake.empty())
+                ++itStart; // skip tail
+            if (find(itStart, snake.end(), nextHead) != snake.end())
+                collision = true;
+        }
+
+        // Snake collides with itself
+        if (collision)
+        {
             system("clear");
-            cout << "Game Over" << endl;
+            cout << "Game Over\n";
+            cout << "Final Length: " << snake.size() << "  Final Score: " << score << "\n";
+
+            save_score(score);
+
+            cout << "\n=== Top 10 Scores ===\n";
+            vector<int> topScores = load_top_scores();
+            for (int i = 0; i < topScores.size(); i++)
+            {
+                cout << (i + 1) << ". " << topScores[i] << "\n";
+            }
+
+            exit(0);
+        }
+
+        // Snake eats poison
+        if (nextHead == poison)
+        {
+            system("clear");
+            cout << "Snake ate poison ☠️ Game Over!\n";
+            cout << "Final Length: " << snake.size() << "  Final Score: " << score << "\n";
+
+            save_score(score);
+
+            cout << "\n=== Top 10 Scores ===\n";
+            vector<int> topScores = load_top_scores();
+            for (int i = 0; i < topScores.size(); i++)
+            {
+                cout << (i + 1) << ". " << topScores[i] << "\n";
+            }
+
             exit(0);
-        }else if (head.first == food.first && head.second == food.second) {
-            // grow snake
-            food = make_pair(rand() % 10, rand() % 10);
-            snake.push_back(head);            
-        }else{
-            // move snake
-            snake.push_back(head);
+        }
+
+        snake.push_back(nextHead);
+
+        if (willGrow)
+        {
+            score += 1;
+            food = spawn_food(snake);
+
+            // 🔹 Respawn poison every 3 points
+            if (score % 3 == 0)
+            {
+                poison = spawn_food(snake);
+            }
+
+            if (food.first == -1)
+            {
+                system("clear");
+                cout << "You Win! Final Length: " << snake.size() << "  Final Score: " << score << "\n";
+
+                save_score(score);
+
+                cout << "\n=== Top 10 Scores ===\n";
+                vector<int> topScores = load_top_scores();
+                for (int i = 0; i < topScores.size(); i++)
+                {
+                    cout << (i + 1) << ". " << topScores[i] << "\n";
+                }
+
+                exit(0);
+            }
+        }
+        else
+        {
             snake.pop_front();
         }
-        render_game(10, snake, food);
-        cout << "length of snake: " << snake.size() << endl;
-
-        sleep_for(500ms);
+
+        // Level calculation: increase level every 5 points
+        level = (score / 5) + 1;
+
+        // Render game (with poison + score)
+        render_game(BOARD_SIZE, snake, food, poison, score);
+
+        cout << "Level: " << level << "\n";
+
+        // Dynamic speed: faster as level increases (min 50ms)
+        int delay_ms = max(50, baseDelay - (level - 1) * 50 - (int)snake.size() * 5);
+        std::this_thread::sleep_for(std::chrono::milliseconds(delay_ms));
     }
-}
+}