C++ program to crate puzzle game

#include<iostream>
#include<conio.h>
#include<windows.h>

BOOL gotoxy(const WORD x, const WORD y) {
    COORD xy;
    xy.X = x;
    xy.Y = y;
    return SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), xy);
}

int main()
{
    char a[17] = {' ','c','a','9','1','2','7','b','4','e','5','d','8','f','3','6'};
    int i,j,k,l,temp;
    char ch,ch1,ch2,ch3,ch4,ch5,ch6,ch7,ch8,ch9,ch10;
    char cho = 15;

    system("cls");

    a[16] = 255;

    system("cls");

    ch = 179;
    ch1 = 196;
    ch2 = 197;
    ch3 = 194;
    ch4 = 193;
    ch5 = 218;
    ch6 = 191;
    ch7 = 192;
    ch8 = 217;
    ch9 = 195;
    ch10 = 180;

    gotoxy(2,1);
    std::cout<<ch5;

    gotoxy(30,1);
    std::cout<<ch6;

    gotoxy(2,9);
    std::cout<<ch7;

    gotoxy(30,9);
    std::cout<<ch8;

    for(i=2;i<=30;i+=7)
        for(j=2;j<=8;j++)
        {
            gotoxy(i,j);
            std::cout<<ch;
        }
    for(k=1;k<=27;k+=1)
        for(l=1;l<=9;l+=2)
        {
            gotoxy(k+2,l);
            std::cout<<ch1;
        }
    for(i=2;i<=21;i+=7)
        for(j=1;j<=7;j+=2)
        {
            gotoxy(i+7,j+2);
            std::cout<<ch2;
        }
    for(i=2;i<=22;i+=7)
    {
        gotoxy(i+7,1);
        std::cout<<ch3;
    }
    for(i=2;i<=21;i+=7)
    {
        gotoxy(i+7,9);
        std::cout<<ch4;
    }
    for(i=2;i<=7;i+=2)
    {
        gotoxy(2,i+1);
        std::cout<<ch9;
    }
    for(i=2;i<=7;i+=2)
    {
        gotoxy(30,i+1);
        std::cout<<ch10;
    }

    gotoxy(20,14);
    std::cout<<"Sort the hexadecimal number in accending order"<<std::endl;
    gotoxy(35,17);
    std::cout<<"CONTROLLER"<<std::endl;
    gotoxy(20,19);
    std::cout<<"Press Right arrow to move next box in the same row"<<std::endl;
    gotoxy(20,20);
    std::cout<<"Press Left arrow to move previous box in the same row"<<std::endl;
    gotoxy(20,21);
    std::cout<<"Press Up arrow to move next box in the same col"<<std::endl;
    gotoxy(20,22);
    std::cout<<"Press Down arrow to move previous box in the same col"<<std::endl;
    gotoxy(20,24);
    std::cout<<"Press E button for exit"<<std::endl;

    int p = 1;

    for(i=1;i<=28;i+=7)
    {
        gotoxy(5+i,2);
        std::cout<<a[p];
        p++;
    }
    for(i=1;i<28;i+=7)
    {
        gotoxy(5+i,4);
        std::cout<<a[p];
        p++;
    }
    for(i=1;i<28;i+=7)
    {
        gotoxy(5+i,6);
        std::cout<<a[p];
        p++;
    }
    for(i=1;i<21;i+=7)
    {
        gotoxy(5+i,8);
        std::cout<<a[p];
        p++;
    }

    i = 27;
    j = 8;

    while(cho != 101)
    {
        if(cho == 'M')
        {
            if(i>21)
                i=i+0;
            else
            {
                i = i+7;
                temp = a[p];
                a[p] = a[p+1];
                a[p+1] = temp;
                gotoxy(i,j);

                std::cout<<a[p+1];
                gotoxy(i-7,j);
                std::cout<<a[p];
                p++;
            }
        }

        gotoxy(i,j);

        if(cho=='K')
        {
            if(k<7)
                i = i-0;
            else
            {
                i = i-7;
                temp = a[p];
                a[p] = a[p-1];
                a[p-1] = temp;
                gotoxy(i+7,j);
                std::cout<<a[p];
                gotoxy(i,j);
                std::cout<<a[p-1];
                p--;
            }
        }
        if(cho=='H')
        {
            if(j<3)
                j = j-0;
            else
            {
                j = j-2;
                temp = a[p];
                a[p-4] = temp;
                gotoxy(i,j+2);
                std::cout<<a[p];
                gotoxy(i,j);
                std::cout<<a[p-4];
                p-=4;
            }
        }
        if(cho=='P')
        {
            if(j>6)
                j = j+0;
            else
            {
                j = j+2;
                temp = a[p];
                a[p] = a[p+4];
                a[p+4] = temp;
                gotoxy(i,j-2);
                std::cout<<a[p];
                gotoxy(i,j);
                std::cout<<a[p+4];
                p+=4;
            }
        }
        cho = getch();
    }

    return 0;
}