csci240/09 - Final Project/horseRace.cpp

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

using namespace std;

// horse class
class Horse{
	public:
		// constructor
		Horse(){
			position = 0;
		}
		
		// access private position
		int getPosition(){
			return position;
		}
		
		// flips a coin, advances ~50% of times
		void advance(){
			if (rand() % 2){ // either 0 or 1
				position++;
			}
		}
	
	private:
		int position; // position of horse on track
};

// race as in event and race as in track
class Race{
	public:
		// constructors
		Race(){
			length = 32; // default length
			numHorses = 4; // default number of horses
			horses = new Horse[numHorses]; // make some horses
		}
		Race(int length){
			this->length = length; // defined length
			this->numHorses = 4; // default number of horses
			horses = new Horse[numHorses]; // make some horses
		}
		
		// get me those horses
		Horse *getHorses(){
			return horses;
		}
		
		// prints one lane
		void printLane(int lane){ // which lane
			int i = 0;
			for (i = 0; i < length; i++){
				// prints the horses number at its latest position
				if (i == horses[lane].getPosition()){
					cout << lane;
				// prints a lane visual
				} else {
					cout << ".";
				} // end if
			} // end for
			cout << endl; // newline and stream flush
		}
		
		// all the horses flip a coin and advance accordingly
		void step(){
			int i = 0;
			// all horses in the race
			for (i = 0; i < numHorses; i++){
				horses[i].advance(); // horses know how to advance
			}			
		}
		
		// prints each lane
		void printAllLanes(){
			int i = 0;
			for (i = 0; i < numHorses; i++){
				printLane(i);
			}			
		}
		
		// checks if any horses have won or tied
		bool isFinished(){
			int i = 0;
			// all horses in the race
			for (i = 0; i < numHorses; i++){
				if (horses[i].getPosition() == length){
					return true; // one or more winners
				}
			}
			return false;
		}
		
		// this function is not used
		// it was mentioned in the UML diagram
		// I prefer to include the run loop in the main function
		// start the race
		void start(){
			while (!this->isFinished()){ // stop if there's a winner
				this->printAllLanes(); // update CLI
				this->step(); // all horses advance...
				cin.ignore(); // ...when the user presses enter
			}
		}
		
		// prints winner(s)
		void printWinners(){
			cout << "horse(s)";
			int i = 0;
			// check all the horses
			for (i = 0; i < numHorses; i++){
				// if horse at i finished...
				if (horses[i].getPosition() == length){
					cout << " " << i; // ...horse at i won!
				}
			}
			cout << " won (tied)!" << endl;
		}
		
	private:
		Horse *horses; // horses
		int numHorses; // number of horses (size of array)
		int length; // length of the track
};


int main(){
	// random number seed
	srand(time(NULL));
	// crate a race
	Race race = Race();
	// while the race is underway
	while(!race.isFinished()){
		race.printAllLanes(); // update CLI
		race.step();  // all horses advance...
		// tell the user what to do
		cout << "Press enter for another turn:";
		cin.ignore(); // ...when the user presses enter
	}
	race.printWinners(); // print the winners
    return EXIT_SUCCESS;
} // end main