быдлокод с багом

#include <iostream>
#include <cstdlib>
#include <iomanip>
#include <ctime>
#include <conio.h>
using namespace std;

int error=0, mass1=0;
struct graph
{
    int x;
    int y;
};

void draw(int, graph[], graph);
int main()
{
    setlocale (0, "");
    int minecount=0, mass2=0, r4;
    graph mine[21], player={9, 9};
    srand(time(0));
    minecount=rand()%16;
    minecount+=4;
    for (mass1=0; mass1<=minecount; mass1++)
    {
        mine[mass1].x=rand()%19;
        mine[mass1].y=rand()%19;
        if ((mine[mass1].x==player.x)&&(mine[mass1].y==player.y)) do
        {
            mine[mass1].x=rand()%19;
            mine[mass1].y=rand()%19;
        } while ((mine[mass1].x==player.x)&&(mine[mass1].y=player.y));
        cout << '\n' << mine[mass1].x << ' ' << ' ' << mine[mass1].y << ' ' << ' ' << mass1;
        for (mass2=mass1-1; mass2>0; mass2--)
        {
            if ((mine[mass1].x==mine[mass1-mass2].x)&&(mine[mass1].y==mine[mass1-mass2].y)) do
            {
                mine[mass1].x=rand()%19;
                mine[mass1].y=rand()%19;
            } while ((mine[mass1].x==mine[mass1-mass2].x)&&(mine[mass1].y==mine[mass1-mass2].y));
        }
    }
    draw (mass1, mine, player);
    while (error==0)
    {
    char move=getch();
    switch(move)
    {
        case 'w': player.x-=1; cout << endl << endl << endl << endl << endl; draw(mass1, mine, player); break;
        case 'a': player.y-=1; cout << endl << endl << endl << endl << endl; draw(mass1, mine, player); break;
        case 's': player.x+=1; cout << endl << endl << endl << endl << endl; draw(mass1, mine, player); break;
        case 'd': player.y+=1; cout << endl << endl << endl << endl << endl; draw(mass1, mine, player); break;
        default: draw(mass1, mine, player); break;
    }
    }
    cout << "\nÂû ïðîèãðàëè!";
    return 0;
}

void draw(int mass1, graph mine[], graph player)
{
    int minecheck=0, playercheck=0;
    for (int i=0; i<21; i++) cout << '=';
    cout << endl;
    for (int i=0; i<19; i++)
    {
        cout << '=';
        for (int j=0; j<19; j++)
        {
            for (int a=0; a<=mass1; a++)
            {
                if ((mine[a].x==i)&&(mine[a].y==j)) minecheck++;
                if ((player.x==i)&&(player.y==j)) playercheck++;
            }
            if ((player.x==mine[mass1].x)&&(player.y==mine[mass1].y)) error=1;
            if ((player.x==-1)||(player.x==19)||(player.y==-1)||(player.y==19)) error=1;
            if (minecheck>0)
            {
                cout << '*';
                minecheck=0;
                continue;
            }
            if (playercheck>0)
            {
                cout << '+';
                playercheck=0;
                continue;
            }
            cout << ' ';
        }
        cout << '=' << endl;
    }
    for (int i=0; i<21; i++) cout << '=';
}