How do i move a caracter in c++?

The character is not moving fluently, is stopping and not moving left or right. I don't know very much about moving a char but I want to learn to use it in my snake project is there any problem with the code?

    while(true)
    {
        system("CLS");
        for(int i=0;i<10;i++)
        {
            cout<<map[i]<<endl;
        }
        system("pause>nul");

        if(GetAsyncKeyState(VK_DOWN))
        {
            int y2=y+1;
            if(map[y2][x]==' ')
            {
                map[y][x]=' ';
                y++;
                map[y][x]='@';
            }
        }
        if(GetAsyncKeyState(VK_UP))
        {
            int y2=y-1;
            if(map[y2][x]==' ')
            {
                map[y][x]=' ';
                y--;
                map[y][x]='@';
            }
        }
        if(GetAsyncKeyState(VK_RIGHT))
        {
            int x2=x+1;
            if(map[x2][x]==' ')
            {
                map[y][x]=' ';
                x++;
                map[y][x]='@';
            }
        }
        if(GetAsyncKeyState(VK_LEFT))
        {
            int x2=x-1;
            if(map[x2][x]==' ')
            {
                map[y][x]=' ';
                x--;
                map[y][x]='@';
            }
        }
    }
    return 0;
}