a3

a3/main.c

@@ -2,39 +2,66 @@
 #include "snake.h"
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
+#include <unistd.h>  // usleep
+#include <termios.h> // terminal config
+#include <fcntl.h>   // non-blocking input
 
-int main(){
+// Enable non-blocking keyboard input
+void enable_nonblocking_input() {
+    struct termios ttystate;
+    tcgetattr(STDIN_FILENO, &ttystate);
+    ttystate.c_lflag &= ~(ICANON | ECHO); // Disable buffering and echo
+    tcsetattr(STDIN_FILENO, TCSANOW, &ttystate);
+    fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK); // Non-blocking mode
+}
+
+// Reset terminal settings to default
+void disable_nonblocking_input() {
+    struct termios ttystate;
+    tcgetattr(STDIN_FILENO, &ttystate);
+    ttystate.c_lflag |= ICANON | ECHO;
+    tcsetattr(STDIN_FILENO, TCSANOW, &ttystate);
+}
+
+int main() {
     struct state game_world;
+    init_world(&game_world, 30, 20); // Bigger field
 
-    // Initialize the game world with dimensions 20x20
-    init_world(&game_world, 20, 20);
+    game_world.sx = 1; // Initial movement right
+    game_world.sy = 0;
 
-    // Run the game loop until the game ends
-    while(1){
+    enable_nonblocking_input();
+
+    while (1) {
+        // Clear screen and print game state
+        printf("\033[H\033[J"); // Clear terminal screen
         print_world(&game_world);
 
-        // Update the game state based on snake movement
-        int game_status = step_state(&game_world);
+        // Read input
+        char ch = getchar();
+        switch (ch) {
+            case 'w': if (game_world.sy != 1) { game_world.sx = 0; game_world.sy = -1; } break;
+            case 's': if (game_world.sy != -1) { game_world.sx = 0; game_world.sy = 1; } break;
+            case 'a': if (game_world.sx != 1) { game_world.sx = -1; game_world.sy = 0; } break;
+            case 'd': if (game_world.sx != -1) { game_world.sx = 1; game_world.sy = 0; } break;
+            case 'q': printf("Quit.\n"); goto end;
+        }
 
-        // Check the result of the move
-        if (game_status == END_WALL) {
-            printf("Game Over: Hit the Wall!\n");
+        // Step game
+        int status = step_state(&game_world);
+        if (status == END_WALL) {
+            printf("Game Over: Hit the wall!\n");
             break;
-        }
-        if (game_status == END_SNAKE) {
-            printf("Game Over: Snake hit itself!\n");
-            break;
-        }
-        if (game_status == END_FOOD) {
-            printf("Congratulations! You ate all the food!\n");
+        } else if (status == END_SNAKE) {
+            printf("Game Over: Ate itself!\n");
             break;
         }
 
-        sleep(1);
+        usleep(200000); // Delay ~5 fps
     }
 
+end:
+    disable_nonblocking_input();
     free_snake(game_world.snake);
-
     return 0;
 }