Snake/Ex_5.1/Snake.cpp

#include <iostream>
#include <windows.h>
#include "Const.h"
#include "Snake.h"

int snake_size =1; //Òåêóùèé ðàçìåð çìåéêè; >0 Âêëþ÷àåò ãîëîâó + ðàçìåð õâîñòà (åñëè 1 - òî òîëüêî ãîëîâà)
int snake_x[L]{0};//Ìàññèâ êîîðäèíàò çìåéêè ïî ãîðèçîíòàëè(X)

void start_snake()//íà÷àëüíîå ïîëîæåíèå ãîëîâû çìåéêè ðàíäîìíîå
{
	int step = rand() % L + 1; 
	//step = 13;
	//snake_x[0] = 13;

	for (int i = 0; i < step - 1; i++)
	{
		move_snake();
	}
}


void init_snake()//Óñòàíàâëèâàåòñÿ íà÷àëüíûé ðàçìåð çìåéêè.
{
	std::cout << "Enter snake_size > 0. Snake_size must be <" << L << std::endl;
	std::cin >> snake_size;

	if (snake_size <= 0 || snake_size > L)//Ïðîâåðêà íà äîïóñòèìûé ðàçìåð çíà÷åíèÿ.
	{
		std::cout << "Err! Wrong size " << std::endl;
		exit(1);
	}
	
//Çàïîëíåíèå ìàññèâà êîîðäèíàò èíäåêñàìè îò 1 äî L; snake_x[0] = 1
//	snake_x[L-1] - íà÷àëî õâîñòà
//	snake_x[L-snake_size] - ïîëå, ãäå íàõîäèòñÿ ïóñòîé ñèìâîë
		
	for (int i = 0; i < L; i++)
		{
			snake_x[i] = i + 1;
		}
}
void move_snake()// Ïåðåäâèãàþòñÿ ýëåìåíòû çìåéêè.
{//Äëÿ äâèæåíèÿ âïðàâî, ñìåùåíèå èíäåêñîâ ïðîèñõîäèò âëåâî íà 1 ýëåìåíò
	int tmp = snake_x[0];
	for (int j = 0; j < L - 1; j++)
	{
		snake_x[j] = snake_x[j + 1];
	}
	snake_x[L - 1] = tmp;
}