1. Issues

1.1 How to storage snake ?

A struct whitch include position array, and snake's length.

1.2 How to storage snake's food ?

A struct include food's coordinate and scores.

1.3 How to add a new cell to snake ?

Just add a new cell to head .

1.4 How to generate a snake's food ?

We can caluculate the total legal grids. And we can generate a random number everytime. We can let total grids sub snake's length. Let d equal random number MOD remaining Numbers. And we count i to d while grid can put food(not snake's body). Finally, We put food on that grid.

1.5 How to judge snake eat the food ?

Check snake's head's position and food's position equal.

1.6 How to let snake move automatical ?

Using non-blocking IO and do ticks.

1.7 How to check snake don't hit itself ?

Check snake's head's next position not in current pos(0,length);