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This example creates a simple fruit machine.
At the start of the game, the player has £1 in credit. Each spin costs 20p. If all three reels match then they win some money and can play for longer. Once their money runs out, the game is over.
The program now repeatedly chooses random numbers to correspond to the positions of each of the three reels on the fruit machine.
The screenshot shows the program running on an Ubuntu laptop, but it can also be compiled and executed on an Apple Mac or Raspberry Pi.
Select and copy the C++ source-code at the bottom of this post.
Paste into a text editor, such as Nano or Geany.
Then save the new file, ending in .cpp
I used fruit.cpp
To compile from the command-line:
g++ -o fruit fruit.cpp
To run from the command-line:
./fruit
Here's the code:
#include <iostream> // To use screen
#include <cstdlib> // To use random()
#include <unistd.h> // To see numbers using time()
#include <iomanip> // Set decimal places to display
using namespace std; // Names for cout and endl
int main()
{
srandom( time( 0 ) ); // Seed the random numbers
string symbol[5]; // Array of symbols on reel
symbol[0] = "\e[35m grapes ";
symbol[1] = "\e[33m pasty ";
symbol[2] = "\e[32m melon ";
symbol[3] = "\e[31m cherries";
symbol[4] = "\e[38;5;226m lemon ";
int reel1, reel2, reel3;
// Start with £1 credit int credit = 100;
// Keep playing until run out of money
while ( credit > 0 )
{
// Play a game
credit = credit - 20; // Costs you 20p
// Display money left on row 3, column 10 at top of screen
cout << "\e[3;10H"; // Row 3, column 10
cout << "Credit £";
cout << fixed << setprecision(2);
cout << static_cast<float>(credit) / 100;
cout << " " << endl;
// Simulate the spinning reels
for ( int swaps=0; swaps<30; swaps++)
{
reel1 = random() % 5; reel2 = random() % 5; reel3 = random() % 5;
cout << "\e[5;10H"; // Row 5, column 10
cout << symbol[reel1] << flush;
cout << "\e[5;30H"; // Row 5, column 30
cout << symbol[reel2] << flush;
cout << "\e[5;50H"; // Row 5, column 50
cout << symbol[reel3] << flush;
cout << endl;
// Pause for tenth of a second
usleep( 100000 );
} // end of the for loop
// Reset colours
cout << "\e[0m";
// Move cursor to row 7, column 10 of screen
cout << "\e[7;10H";
// Check whether all 3 reels show the same thing
// If they do you win the jackpot
if ( reel1==reel2 and reel2==reel3 )
{
cout << "£5 JACKPOT!" << endl;
credit = credit + 500;
}
else
cout << "Try again. " << endl;
// Pause for 3 seconds before next go
sleep(3);
// Move cursor to row 7, column 10 on screen
cout << "\e[7;10H";
cout << " " << endl;
} // end of while loop
// Program execution only reaches here if out of credit
cout << "Out of money - Game over";
cout << endl << endl;
return 0;
}
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