GOL

#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>


int main()
{
    int myarray [25][45];
    int arrayCopy [25][45];
    char repeat;
    int choice;


     //Explains the rules of the game to the user.
    std::cout
         << std::endl << "This is a simulation of the \"Game of Life\"." << std::endl
         << std::endl << "These are the rules of the \"Game of Life\":" << std::endl
         << std::endl << "1. If an occupied cell has zero or one neighbor, it dies of loneliness."
         << std::endl << "2. If an occupied cell has more than three neighbors, it dies of overcrowding."
         << std::endl << "3. If an empty cell has exactly three occupied neighbor cells, there is a birth of a new cell to replace the empty cell."
         << std::endl << "4. Births and deaths are instantaneous and occur at the changes of generation."
         << std::endl << std::endl;

    std::cout << "There are three choices to the starting pattern of your cells:" << std::endl;
    std::cout << "1. Simple oscillation." << std::endl;
    std::cout << "2. Glider pattern." << std::endl;
    std::cout << "3. Gun pattern." << std::endl;
    std::cout << "4. Quit program" << std::endl;
    std::cout << "If the pattern becomes \"stable\" the program will end." << std::endl;

    //loop to allow the user to run a new simulation
    do
    {
        //gets input choice from the user, if 4 is entered program terminates.
        do
        {

            std::cout << "Which pattern would you like to simulate?" << std::endl;
            std::cout << "Or press 4 to quit." << std::endl;
            std::cin >> choice;

            if(choice == 4)
            {
                return 0;
            }

        }while(choice < 1 || choice > 4);


        //loop assigns all spaces a blank position to start the simulation
        //the actual grid is larger than the displayed grid to account for "infinite grid"
        for(int x=0; x<20; x++)
            for(int y=0; y<40; y++)
            {
                myarray[x][y] = 0;          //assigns a blank spot to all spaces to start
            }

        for(int x=0; x<20; x++)             //This loops on the rows.
        {
            for(int y=0; y<40; y++)         //This loops on the columns
            {
                if(myarray[x][y] == 1)
                    std::cout << '*';
                else
                    std::cout << ' ';
            }
            std::cout << std::endl;
        }

        std::cout << "Would you like to run another simulation?" << std::endl;
        std::cin >> repeat;

    }while(repeat == 'y' || repeat == 'Y' && repeat != 'n');

    return 0;
}