This is a simple lottery simulator that will simulate a lottery game.

lottery.cpp

/**
 * Lottery Simulator
 * This is a simple lottery simulator that will simulate a lottery game.
*/

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <vector>

#define DRAW_SIZE 5

#define TICKET_PRICE 2
#define MINOR_PRIZE 5
#define MAJOR_PRIZE 100
#define JACKPOT 10000

#define MIN_NUMBER 1
#define MAX_NUMBER 30

int numbers_correct(std::vector <int> winningNumbers, std::vector <int> lotteryNumbers){
    int correct = 0;
    for (int i = 0; i < winningNumbers.size(); i++){
        for (int j = 0; j < lotteryNumbers.size(); j++){
            if (winningNumbers[i] == lotteryNumbers[j]){
                correct++;
            }
        }
    }
    return correct;
}

int calculate_winnings_money(int correct){
    if (correct > DRAW_SIZE / 2){
        return MAJOR_PRIZE;
    } else if (correct > 0){
        return MINOR_PRIZE;
    } else {
        return 0;
    }
}

int calculate_winnings(std::vector <int> winningNumbers, std::vector <int> lotteryNumbers){
    int correct = numbers_correct(winningNumbers, lotteryNumbers);
    return calculate_winnings_money(correct);
}

void print_win(std::vector <int> lotteryNumbers, int attempts, int money){
    std::cout << "You won! The winning numbers are: ";
    for (int i = 0; i < lotteryNumbers.size(); i++){
        std::cout << "(" << lotteryNumbers[i] << ") ";
    }
    std::cout << std::endl;
    std::cout << "It took " << attempts << " attempts to win." << std::endl;
    std::cout << "You have £" << money << " " << std::endl;
}

int main(){
    std::srand(std::time(nullptr));
    std::vector<int> lotteryNumbers;
    for (int i = 0; i < DRAW_SIZE; i++){
        lotteryNumbers.push_back(std::rand() % MAX_NUMBER + MIN_NUMBER);
    }
    int money = 2;
    int attempts = 0;
    while (true){
        money -= TICKET_PRICE;
        std::vector<int> winningNumbers;
        for (int i = 0; i < DRAW_SIZE; i++){
            winningNumbers.push_back(std::rand() % MAX_NUMBER + MIN_NUMBER);
        }
        if (lotteryNumbers == winningNumbers){
            money += JACKPOT;
            print_win(winningNumbers, attempts, money);
            break;
        } else {
            money += calculate_winnings(winningNumbers, lotteryNumbers);
        }
        attempts++;
    }
    return 0;
}