#include <conio.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int pos=6;
int change[7][4]=
      {
	    {0,1,2,0},{1,1,3,0},{0,6,4,2},{1,3,5,6},{2,5,4,4},{3,5,5,4},{0,3,4,2}
      };

char name[7][5]={"lab1","lab2","lab3","lab4","lab5","lab6","HELP"};

int coord[7][2]=
     {
	    {30,9},{37,9},{27,11},{41,11},{30,13},{37,13},{34,11}
     };

void bg_window();
void print_menu();
void select_menu();
void help();

void main(int argc, char *argv[])
{
	int key;

	if(strcmp(argv[1], "/help")==0 || strcmp(argv[1], "/h")==0)
	{	
		bg_window();
		select_menu();
	}
	else
	{
		bg_window();
		switch(key)
{
case 72:pos=change[pos][0];break;
case 77:pos=change[pos][1];break;
case 80:pos=change[pos][2];break;
case 75:pos=change[pos][3];break;
case 13:select_menu();break;
case 27:exit();
}
	
}		
}

void bg_window()
{	
	int i;
	window(2,2,79,24);
	textbackground(BLUE);
	textcolor(GREEN);
	clrscr(); 
	
	puts(" ╔══════════════════════════════════════════════════════════════════════════╗ ");
	
	for(i=0;i<=20;i++)
		puts("  ║                                                                          ║ ");
	
	puts("  ╚══════════════════════════════════════════════════════════════════════════╝ ");
}

void print_menu()
{	
	int i;
	
	window(5,3,76,23);
	textbackground(BLUE);
	clrscr(); 
	
	for(i=0;i<7;i++)
	{	
		window(coord[i][0],coord[i][1],coord[i][0]+5,coord[i][1]+1);
		textcolor(i==pos?LIGHTRED:YELLOW);
		textbackground(i==pos?GREEN:RED);
		clrscr();
		gotoxy(3,1);
		cprintf("%s", menu[i]);
	}
}

void select_menu()
{
	int key;
	window(5,3,76,23);
	textbackground(BLUE);
	textcolor(YELLOW);
	clrscr(); 	
	
	switch(pos)
	{
		case 0:
			help();
			break;
		case 1: case 2: case 3: case 4: case 5: case 6:
			cprintf("Лабораторная работа номер %d", pos);
			break;
	}
	
	for(;;)
	{
		if(getch()==27)
			break;
	}
}

void help()
{
	FILE *f;
	char *c;
	int y=2;
	
	if((f=fopen("HELP", "rt"))==NULL)
	{
		cprintf("\nОшибка открытия файла!\n");
	}
	else
	{
		while(!feof(f))
		{	
			c=fgetc(f);
			if(c=='\n')
			{
				gotoxy(1,y++);
			}
			else
			{	
				cprintf("%c", c);
			}
		}
		fclose(f);
	}
}