snake_c

public

Small snake game in C

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28 commits 2 branches 1 tag 0 releases565.5 KiB

Commit `d5b77365a624`

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Jaglekon <58274093+Jaglekon@users.noreply.github.com>2026-03-29 13:47 UTC

1 file changed+106-79

improved visuals

Modified file: snake.c+106 additions−79 deletions@@ -64,14 +64,14 @@ typedef struct snake_part {
 } snake_part;
 
 typedef struct snake {
-  snake_part position[MAX_LENGTH];
+  snake_part * position;
   uint16_t length;
 } snake;
 
 
 uint8_t update_snake (selected game_size, snake *my_snake, direction shift);
 void update_field(snake my_snake, selected game_size, 
-  board_state **board, selected fruit);
+  board_state **board, bool init);
 selected new_fruit(selected game_size, board_state **board);
 
 bool start_animation();
@@ -401,9 +401,11 @@ int main(int argc, char *args[]) {
 
   /* initialisation of the game */
 
-  snake my_snake = {};
+  snake my_snake;
   my_snake.length = STARTING_LENGTH;
 
+  my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));
+
   direction shift = RIGHT;
   direction tmp_direction = shift;
 
@@ -414,19 +416,17 @@ int main(int argc, char *args[]) {
     my_snake.position[0].coords.x = game_size.x >> 1;
     my_snake.position[0].directions[0] = shift;
     my_snake.position[0].directions[1] = shift;
-    for (i = 1; i < my_snake.length; i++) {
+    for (i = 1; i <= my_snake.length; i++) {
       my_snake.position[i].coords.y = -1;
       my_snake.position[i].coords.x = -1;
     }
   }
 
-  selected fruit = {-1, -1};
-
   board_state **board = malloc(game_size.y * sizeof(board_state*));
   board_state *values = calloc(game_size.y * game_size.x, sizeof(board_state));
 
   if(board == NULL || values == NULL)
-  goto end_of_program;
+    goto end_of_program;
 
   {
     uint8_t i;
@@ -435,11 +435,9 @@ int main(int argc, char *args[]) {
       board[i] = values + i * game_size.x;
   }
 
+  update_field(my_snake, game_size, board, true);
 
-  update_field(my_snake, game_size, board, fruit);
-
-  fruit = new_fruit(game_size, board);
-  update_field(my_snake, game_size, board, fruit);
+  selected fruit = new_fruit(game_size, board);
 
   bool paused = false;
 
@@ -507,32 +505,36 @@ int main(int argc, char *args[]) {
 
         uint8_t update = update_snake(game_size ,&my_snake, shift);
 
-        switch (update) {
-            case 0: 
-              printf("\nERROR\n");
-              goto end_free;
-              break;
-            case 2:
-              printf("\nHAHA LOST, LOSER");
-              goto end_free;
-              break;
-            default:
-              break;
-        }
-
-        update_field(my_snake, game_size, board, fruit);
-
-        
         uint8_t head_y = my_snake.position[0].coords.y;
         uint8_t head_x = my_snake.position[0].coords.x;
 
+        
+        update_field(my_snake, game_size, board, false);
+
         if (head_y == fruit.y && head_x == fruit.x) {
           my_snake.length++;
+          snake_part *tmp = realloc(my_snake.position, (my_snake.length + 1) * sizeof(snake_part));
+          if (tmp == NULL)
+            goto end_free;
+          my_snake.position = tmp;
           fruit = new_fruit(game_size, board);
         }
 
-        update_field(my_snake, game_size, board, fruit);
         draw_board(game_size, board, current_size, false, false);
+
+        switch (update) {
+          case 0: 
+            printf("\nERROR\n");
+            goto end_free;
+            break;
+          case 2:
+            printf("\nHAHA LOST, LOSER");
+            goto end_free;
+            break;
+          default:
+            break;
+        }
+
       }
     }
     nanosleep(&milispeed, NULL);
@@ -540,8 +542,9 @@ int main(int argc, char *args[]) {
 
 end_free:
 
-      free(board);
-      free(values);
+    free(my_snake.position);
+    free(board);
+    free(values);
 
 end_of_program:
 
@@ -597,47 +600,43 @@ uint8_t update_snake (selected game_size, snake *my_snake, direction shift) {
   return 1;
 }
 
-void update_field(snake my_snake, selected game_size, board_state **board, selected fruit) {
+void update_field(snake my_snake, selected game_size, board_state **board, bool init) {
 
   uint8_t i, j;
 
-  for (i = 0; i < game_size.y; i++) {
-    for (j = 0; j < game_size.x; j++) {
-      board[i][j] = AIR;
-    }
-  }
+  board_state snake_bit[DIRECTIONS][DIRECTIONS] = {
+    [UP][UP] = VERTICAL,
+    [DOWN][DOWN] = VERTICAL,
+    
+    [RIGHT][RIGHT] = HORIZONTAL,
+    [LEFT][LEFT] = HORIZONTAL,
+    
+    [DOWN][RIGHT] = BOTTOM_LEFT,
+    [LEFT][UP] = BOTTOM_LEFT,
+    
+    [UP][RIGHT] = TOP_LEFT,
+    [LEFT][DOWN] = TOP_LEFT,
+    
+    [DOWN][LEFT] = BOTTOM_RIGHT,
+    [RIGHT][UP] = BOTTOM_RIGHT,
+          
+    [UP][LEFT] = TOP_RIGHT,
+    [RIGHT][DOWN] = TOP_RIGHT
+  };
 
-  for (i = 0; i < my_snake.length; i++) {
-    int16_t x = my_snake.position[i].coords.x;
-    int16_t y = my_snake.position[i].coords.y;
-    if (x >= 0 && y >= 0) {
-      if (!i) {
-        if (my_snake.position[i].directions[0] == RIGHT) {
-          board[y][x] = HEAD_1;
-        } else {
-          board[y][x] = HEAD_2;
-        }
-      } else {
 
-        board_state snake_bit[DIRECTIONS][DIRECTIONS] = {
-          [UP][UP] = VERTICAL,
-          [DOWN][DOWN] = VERTICAL,
-          
-          [RIGHT][RIGHT] = HORIZONTAL,
-          [LEFT][LEFT] = HORIZONTAL,
-          
-          [DOWN][RIGHT] = BOTTOM_LEFT,
-          [LEFT][UP] = BOTTOM_LEFT,
-          
-          [UP][RIGHT] = TOP_LEFT,
-          [LEFT][DOWN] = TOP_LEFT,
-          
-          [DOWN][LEFT] = BOTTOM_RIGHT,
-          [RIGHT][UP] = BOTTOM_RIGHT,
-          
-          [UP][LEFT] = TOP_RIGHT,
-          [RIGHT][DOWN] = TOP_RIGHT
-        };
+  if (init) {
+    for (i = 0; i < game_size.y; i++) {
+      for (j = 0; j < game_size.x; j++) {
+        board[i][j] = AIR;
+      }
+    }
+
+    for (i = 1; i < my_snake.length; i++) {
+      int16_t x = my_snake.position[i].coords.x;
+      int16_t y = my_snake.position[i].coords.y;
+      
+      if (x >= 0 && y >= 0) {
 
         direction first = my_snake.position[i].directions[0];
         direction second = my_snake.position[i].directions[1];
@@ -645,10 +644,34 @@ void update_field(snake my_snake, selected game_size, board_state **board, selec
         board[y][x] = snake_bit[first][second];
       }
     }
+  } else {
+    
+    int16_t x = my_snake.position[my_snake.length].coords.x;
+    int16_t y = my_snake.position[my_snake.length].coords.y;
+    
+    if (x != -1 && y != -1)
+      board[y][x] = AIR;
+
+    
+    x = my_snake.position[1].coords.x;
+    y = my_snake.position[1].coords.y;
+  
+    direction first = my_snake.position[1].directions[0];
+    direction second = my_snake.position[1].directions[1];
+    
+    if (x != -1 && y != -1)
+      board[y][x] = snake_bit[first][second];
   }
 
-  if (fruit.x >= 0 && fruit.y >= 0)
-    board[fruit.y][fruit.x] = FRUIT;
+
+  int16_t x = my_snake.position[0].coords.x;
+  int16_t y = my_snake.position[0].coords.y;
+
+  if (my_snake.position[0].directions[0] == RIGHT) {
+    board[y][x] = HEAD_1;
+  } else {
+    board[y][x] = HEAD_2;
+  }
 }
 
 selected new_fruit(selected game_size, board_state **board) {
@@ -667,6 +690,8 @@ selected new_fruit(selected game_size, board_state **board) {
 
   selected fruit = {x, y};
 
+  board[fruit.y][fruit.x] = FRUIT;
+
   return fruit;
 }
 
@@ -894,7 +919,7 @@ bool draw_board(
   uint8_t i, j;
 
   uint8_t actual_height = game_size.y + 2;
-  uint8_t actual_width = game_size.x * 2 + 2;
+  uint8_t actual_width = game_size.x * 2 + 1 + 2;
 
   if (actual_width > window_size.ws_col || actual_height > window_size.ws_row) {
 
@@ -919,30 +944,32 @@ bool draw_board(
 
   for (i = 0; i < horizontal_buffer; i++)
     printf(" ");
-  printf("+");
+  printf("╭");
   for (i = 0; i < game_size.x; i++)
-    printf("--");
-  printf("+\n");
+    printf("──");
+  printf("─╮\n");
 
   for (i = 0; i < game_size.y; i++) {
 
     for (j = 0; j < horizontal_buffer; j++)
       printf(" ");
 
-    printf("|");
+    printf("│");
 
     for (j = 0; j < game_size.x; j++)
       printf("%s", give_state(board[i][j]));
 
-    printf("|\n");
+    printf("%s", give_state(board[i][0]));
+
+    printf("\033[%c│\n", LEFT_CODE);
   }
 
   for (i = 0; i < horizontal_buffer; i++)
     printf(" ");
-  printf("+");
+  printf("╰");
   for (i = 0; i < game_size.x; i++)
-    printf("--");
-  printf("+");
+    printf("──");
+  printf("─╯");
 
   if (paused)
     draw_pause(window_size, actual_width, actual_height);
@@ -1003,7 +1030,7 @@ char *give_state(board_state square) {
       return "\033[33m═\033[31mX\033[0m";
       break;
     case HEAD_2:
-      return "\033[31m X\033[0m";
+      return "\033[31m\33[CX\033[0m";
       break;    
     case VERTICAL:
       return "\033[33m ║\033[0m";
@@ -1024,7 +1051,7 @@ char *give_state(board_state square) {
       return "\033[33m═╗\033[0m";
       break;
     default:
-      return "  ";
+      return " ·";
       break;
   }
 }

snake_c

Commit d5b77365a624

Commit `d5b77365a624`