refactoring: drawing snake

src/main/c/Snake/snake_start.c

@@ -17,6 +17,7 @@ void main_menu();
 void game();
 Snake initialize_game();
 void draw(Snake *snake);
+int part_of_snake(Snake *snake, unsigned char tile);
 
 
 void snake_start(){
@@ -83,24 +84,24 @@ void draw(Snake *snake){
     for(int i = 1; i <= HEIGHT; i++){
         printf("|");
         for(int j = 1; j <= WIDTH; j++){
-            //printf("%d:", i * 16 + j);
-            for(int pos = 0; pos < snake->length; pos++){
-                //printf(" %d", snake->segments[pos]);
-                if(i * 16 + j == snake->segments[pos]){
-                    if(pos == 0){
-                        printf("0");
-                    }else{
-                        printf("O");
-                    }
-                    break;
-                }else if(pos == snake->length - 1){
-                    printf(" ");
-                }
-            }
+            int index = part_of_snake(snake, i * 16 + j);
+            if(index == 0){printf("0");}
+            else if(index > 0){printf("O");}
+            else{printf(" ");}
         }
         printf("|\n");
     }
     printf("+");
     for(int i = 0; i < WIDTH; i++){printf("-");}
     printf("+\n");
+}
+
+//returns index of segments which is identical to tile; -1 if not found
+int part_of_snake(Snake *snake, unsigned char tile){
+    for(int i = 0; i < snake->length; i++){
+        if(snake->segments[i] == tile){
+            return i;
+        }
+    }
+    return -1;
 }

src/main/c/Snake/snake_start.h

@@ -0,0 +1,6 @@
+#ifndef SNAKE_START_H
+#define SNAKE_START_H
+
+void snake_start();
+
+#endif // SNAKE_START_H