Fun game for the raging compulsive alchoholic gambler, such as myself.
Although the game may vary among casinos, the basic premise is the user picks 10 numbers out of 80. The computer will randomly draw 20 numbers out of 80. If you matched with any of the computer picks, you win mad amounts of cash.
The game is made using the simplest of c++ constructs; mostly 1 dimensional arrays and for loops.
Here is a mind-blowing statistic I learned whilst doing a little homework on the game of keno:
The probability of a player hitting all 20 numbers on a 20 spot ticket is approximately 1 in 3.5 quintillion (1 in 3,535,316,142,212,180,000 to be exact). If every person now alive played one keno game every single second of their lives, there would be about one solid 20 jackpot-winning ticket to date. If all these possible keno tickets were laid end to end, they would span the Milky Way galaxy—and only one of them would be a winner. To this day, there are no reports of a keno player lucky enough to match all 20 numbers. (from wikipedia.org)
Here be the code:
#include <iostream>
#include <algorithm>
#include <ctime>
#include <windows.h>
using namespace std;
struct coord
{
int X;
int Y;
int number;
bool selected;
coord(){selected = false;}
};
class keno
{
public:
//class default constructor
keno();
//game functions
void display_board();
void display_numbers();
void get_picks();
void computer_draw();
void calc_winnings();
void reset();
//console enviornment
void set_console_size(int x, int y);
void gotoxy(int x, int y);
void clear_screen();
private:
int turn_counter;
int picks;
int money;
int hits;
int random_draws[20];
int user_picks[10];
int computer_picks[20];
coord num_coords[80];
};
int main()
{
keno mykeno;
//Super-Complex Game Engine
while(true)
{
mykeno.display_board();
mykeno.display_numbers();
mykeno.get_picks();
mykeno.computer_draw();
mykeno.calc_winnings();
mykeno.reset();
}
return 0;
}
keno::keno()
{
turn_counter = 1;
picks = 0;
money = 500;
hits = 0;
srand(time(NULL));
SetConsoleTitle("Keno!");
set_console_size(58,37);
//Generate X,Y ASCII grid coordinates for displaying numbers
for(int i=0, x=8, y=10; i<80; i++, x+=5)
{
num_coords[i].X = x;
num_coords[i].Y = y;
num_coords[i].number = i+1;
if(x>=53)
{
x=3;
y+=3;
}
}
}
void keno::display_board()
{
cout << " ---------------------------------------------------\n"
<< " |\\ \\\n"
<< " | \\ \\\n"
<< " | |---------------------------------------------------|\n";
for(int i=0; i<31; i++)
{
cout << " | | |\n";
}
cout << " \\ | |\n"
<< " \\ --------------------------------------------------- \n";
gotoxy(8,5); cout << "Game #" << turn_counter;
gotoxy(40,5); cout << "Total: $" << money;
gotoxy(40,35); cout << "$20 per play.";
}
void keno::display_numbers()
{
int randoms[80];
int snooze = 30;
int r=0;
//populate an array of numbers
for(int i=0; i<80; i++)
{
randoms[i] = i;
}
//randomly shuffle the array
for(int i=0; i<160; i++)
{
swap(randoms[rand()%80], randoms[rand()%80]);
}
//move to the appropriate position on the board that corrosponds to the random number
//and display it.
for(int i=0; i<80; i++)
{
r = randoms[i];
gotoxy(num_coords[r].X, num_coords[r].Y);
cout << num_coords[r].number;
Sleep(snooze);
}
}
void keno::get_picks()
{
int number = 0;
int i=0;
while(picks<10)
{
//previous entry clear
gotoxy(8,35); cout << " ";
gotoxy(8,35); cout << "Enter number: ";
cin >> number;
number--;
user_picks[i] = number;
//put [ ] box around user selected number
gotoxy(num_coords[number].X-1, num_coords[number].Y); cout << '[';
if(number<9) //handle 1 digit numbers
{
gotoxy(num_coords[number].X+1, num_coords[number].Y);
}
else //handle 2 digit numbers
{
gotoxy(num_coords[number].X+2, num_coords[number].Y);
}
num_coords[number].selected = true;
cout << ']';
picks++;
gotoxy(40,35); cout << "Pick " << picks << " of 10 ";
}
//Clear to prevent further user entry
gotoxy(8,35); cout << " ";
}
void keno::computer_draw()
{
int randoms[80];
int snooze = 30;
int cp = 0;
//$20 to play
money -= 20;
gotoxy(8,7); cout << "Draw: ";
gotoxy(40,7); cout << "Hits: ";
//generate a list of numbers
for(int i=0; i<80; i++)
{
randoms[i] = i;
}
//randomly shuffle the numbers
for(int i=0; i<160; i++)
{
swap(randoms[rand()%80], randoms[rand()%80]);
}
//get a list of 20 'computer picked' randomly drawn numbers
for(int i=0; i<20; i++)
{
computer_picks[i] = randoms[i];
}
for(int i=0; i<20; i++)
{
cp = computer_picks[i];
//handle 'Hits'
if(num_coords[cp].selected)
{
hits++;
gotoxy(num_coords[cp].X-1, num_coords[cp].Y); cout << "HIT!";
gotoxy(18,7); cout << "HIT!";
gotoxy(47,7); cout << hits;
}
else //handle 'Miss'; display *'s around computer selected numbers.
{
gotoxy(num_coords[cp].X-1, num_coords[cp].Y); cout << '*';
if(cp<9) //handle 1 digit numbers
{
gotoxy(num_coords[cp].X+1, num_coords[cp].Y); cout << '*';
}
else //handle 2 digit numbers
{
gotoxy(num_coords[cp].X+2, num_coords[cp].Y); cout << '*';
}
}
gotoxy(14,7); cout << cp+1;
Sleep(1000);
//number clear
gotoxy(18,7); cout << " ";
}
//final clear
gotoxy(8,7); cout << " ";
turn_counter++;
}
void keno::calc_winnings()
{
gotoxy(20,6); cout << "You Win ";
switch(hits)
{
case 1: money += 10; cout << "$10!"; break;
case 2: money += 20; cout << "$20!"; break;
case 3: money += 50; cout << "$50!"; break;
case 4: money += 100; cout << "$100!"; break;
case 5: money += 200; cout << "$200!"; break;
case 6: money += 500; cout << "$500!"; break;
case 7: money += 1000; cout << "$1,000!"; break;
case 8: money += 2000; cout << "$2,000!"; break;
case 9: money += 5000; cout << "$5,000!"; break;
case 10: money += 10000; cout << "$10,000!"; break;
default: cout << "Nothing!";
}
//cin.ignore();
//cin.get();
Sleep(3000);
}
void keno::reset()
{
picks = 0;
hits = 0;
clear_screen();
for(int i=0; i<80; i++)
{
num_coords[i].selected = false;
}
}
//Win32 API functions <windows.h>
void keno::gotoxy(int x, int y)
{
COORD coord;
coord.X = x;
coord.Y = y;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
void keno::clear_screen()
{
DWORD n;
DWORD size;
COORD coord = {0};
CONSOLE_SCREEN_BUFFER_INFO csbi;
HANDLE h = GetStdHandle ( STD_OUTPUT_HANDLE );
GetConsoleScreenBufferInfo ( h, &csbi );
size = csbi.dwSize.X * csbi.dwSize.Y;
FillConsoleOutputCharacter ( h, TEXT ( ' ' ), size, coord, &n );
GetConsoleScreenBufferInfo ( h, &csbi );
FillConsoleOutputAttribute ( h, csbi.wAttributes, size, coord, &n );
SetConsoleCursorPosition ( h, coord );
}
void keno::set_console_size(int x, int y)
{
HANDLE hOut;
SMALL_RECT DisplayArea = {0, 0, 0, 0};
COORD c = {0,0};
hOut = GetStdHandle(STD_OUTPUT_HANDLE);
DisplayArea.Right = x;
DisplayArea.Bottom = y;
c.X = x+1;
c.Y = y+1;
SetConsoleWindowInfo(hOut, TRUE, &DisplayArea);
SetConsoleScreenBufferSize(hOut, c);
}I will gladly accept suggestions, tips for improvement, typos, bugs etc.
Play and have fun knowing that you are not spending your own money.
