Help please

[polodioxide]

I am beginner to c. I have to make snake game to run through microcontroller and FPGA based demo card. I have one code. I have to add some features. but i have troubles with understanding the code.

here are some declarations

typedef unsigned int snake_t;
snake_t *snake;

unsigned int snake_struct_length;
unsigned int snake_head_i;
unsigned int snake_tail_i;
#define SNAKE_EXTEND_STEP 5
unsigned int snake_extend;

and then there is a line like that

snake[snake_head_i] = new_snake_head;

i didn't get "snake[snake_head_i]" part. because snake is a pointer. so what does it mean? Could someone explain me?

[Salem]

Pointers and arrays share the same subscript notation.

With a pointer, writing ptr[index] generates the code for *(ptr+index)

So a pointer to a number of ints say gives you access to each int in that block of integers, simply by incrementing i in ptr[i] (much like you would do with an array of ints).

[polodioxide]

thank you for your quick reply