Hello, Guru!

I'm new fans of your course, thank you so much for making a fruit pudding from hard nut.

You remind us don't forget ask questions in the end of every lessons, here they come:

When I enjoy your lesson 14, crossed funtion part, I'm confused,

Q1) At the 1st time you call crossed fuction:
int Crossed (double line1 , double line2)

{

static int last_direction = 0; //last_direction = 0

static int current_direction = 0;

if(line1>line2)current_direction = 1; //up

if(line1<line2)current_direction = 2; //down current_direction = 1 or 2 right?

if(current_direction != last_direction) //changed That means current_direction != last_direction will be true, then a cross signal will be given, right?
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Q2: 2nd time you call it

int Crossed (double line1 , double line2)

{

static int last_direction = 0; //would last_direction be reset to 0 from =current_direction ?
static int current_direction = 0;

if(line1>line2)current_direction = 1; //up

if(line1<line2)current_direction = 2; //down

if(current_direction != last_direction) //changed


Thanks and have a nice day!