[Object-Oriented Programming] Adventure II

We are going to write a game: The player has to explore in the castle with many levels and a lot of rooms. The task of the player is to find a room where the princess is prinsoned and take her leave the castle. There are many types of rooms, and each type of room has different types of exits. Note that there's a monster in one of the rooms, which the exact location is not able to be aware. But once the player meets a monster, the game is over.

The requirement is that: Room should be an abstract class with common attributes and action defined. Rooms of different types are derived from the Room. The "map" is described in a text file. The program reads the map in at the beginning of the execution.

Head file definition:

#include <iostream>#include <ctime>#include <cstdlib>#include <string>#include <vector>#include <fstream>using namespace std;//abstract classclass Room{protected:int east; // 0->doesn't exist ; num-> tag for the next roomint west;int south;int north;int up;int down;int state; // 0->nothing ; 1-> princess ; -1->demonint tag; // tag for vectorpublic:Room(){}virtual ~Room();void princess(void){state = 1;}void demon(void){state = -1;}virtual int East(void) {return 0;} // return the tag of the east roomvirtual int West(void) {return 0;}virtual int South(void) {return 0;}virtual int North(void) {return 0;}virtual int Up(void) {return 0;}virtual int Down(void) {return 0;}virtual int getState(void){return state;} // what's in this roomvirtual int getTag(void){return tag;} // return the room tagvirtual void printInfo(void) {} // print the info of this room};//rooms of different typesclass Type_one : public Room{public:Type_one(int t, int s);int South(void){return south;}void printInfo(void);};class Type_two : public Room{public:Type_two(int t, int n, int s, int e, int u);int North(void){return north;}int South(void){return south;}int East(void){return east;}int Up(void){return up;}void printInfo(void);};class Type_three : public Room{public:Type_three(int t, int w);int West(void){return west;}void printInfo(void);};class Type_four : public Room{public:Type_four(int t, int n, int s);int North(void){return north;}int South(void){return south;}void printInfo(void);};class Type_five : public Room{public:Type_five(int t, int n);int North(void){return north;}void printInfo(void);};class Type_six : public Room{public:Type_six(int t, int s, int e, int d);int North(void){return north;}int South(void){return south;}int East(void){return east;}int Down(void){return down;}void printInfo(void);};//class for game with vector of Room* typeclass Game{private:int now; // the current room's tagstring command; vector<Room*> rooms;public:Game(){rooms.push_back(new Room());}~Game(){}void addRoom(Room* r);     void inputPrincess(int f); // input princess in room f    void inputDemon(int f); // input demon in room fvoid getCommand(void); // read in a new commandint goToNext(void); // if succeed, return the next room's tag, return 0 if notvoid changeTag(int t); // enter the room tint whatHappened(int meet); //print info of the next room and return 0, -1, 1 to represent the state};

functions:

Type_one::Type_one(int t, int s){north = 0;south = s;east = 0;west = 0;up = 0;down = 0;tag = t;state = 0;}void Type_one::printInfo(void){cout << "Welcome to room No."<< getTag() << ". There are 1 exits as: south." << endl;cout << "Enter your command:" << endl;}Type_two::Type_two(int t, int n, int s, int e, int u){north = n;south = s;east = e;west = 0;up = u;down = 0;tag = t;state = 0;}void Type_two::printInfo(void){cout << "Welcome to room No."<< getTag() << ". There are 4 exits as: north, south, east and up." << endl;cout << "Enter your command:" << endl;}Type_three::Type_three(int t, int w){north = 0;south = 0;east = 0;west = w;up = 0;down = 0;tag = t;state = 0;}void Type_three::printInfo(void){cout << "Welcome to room No."<< getTag() << ". There are 1 exits as: west." << endl;cout << "Enter your command:" << endl;}Type_four::Type_four(int t, int n, int s){north = n;south = s;east = 0;west = 0;up = 0;down = 0;tag = t;state = 0;}void Type_four::printInfo(void){cout << "Welcome to room No."<< getTag() << ". There are 2 exits as: north and south." << endl;cout << "Enter your command:" << endl;}Type_five::Type_five(int t, int n){north = n;south = 0;east = 0;west = 0;up = 0;down = 0;tag = t;state = 0;}void Type_five::printInfo(void){cout << "Welcome to room No."<< getTag() << ". There are 1 exits as: north." << endl;cout << "Enter your command:" << endl;}Type_six::Type_six(int t, int s, int e, int d){north = 0;south = s;east = e;west = 0;up = 0;down = d;tag = t;state = 0;}void Type_six::printInfo(void){cout << "Welcome to room No."<< getTag() << ". There are 3 exits as: north, east and down." << endl;cout << "Enter your command:" << endl;}void Game::addRoom(Room* r){rooms.push_back(r);}void Game::inputPrincess(int f){rooms[f]->princess();}void Game::inputDemon(int f){rooms[f]->demon();}void Game::getCommand(void){string go, direction;cin >> go >> this->command;}int Game::goToNext(void){if(command == "east")return rooms[now]->East();else if(command == "west")return rooms[now]->West();else if(command == "south")return rooms[now]->South();else if(command == "north")return rooms[now]->North();else if(command == "up")return rooms[now]->Up();else if(command == "down")return rooms[now]->Down();else{cout << "wrong command!" << endl;return 0;}}void Game::changeTag(int t){now = t;}int Game::whatHappened(int meet){if(!rooms[now]->getState()){rooms[now]->printInfo();return 0;}else if(rooms[now]->getState()==1){if(!meet){cout << "congratulation! You find the princess!" << endl;cout << "The process is going to leave with the you" << endl;}rooms[now]->printInfo();return 1; }else if(rooms[now]->getState()==-1){cout << "Oops! There is a monster! " << endl;cout << "GAME OVER" << endl;return -1;}}

main( )

int main(){int meet = 0, t, ww, ran1, ran2, i, j, n, s, w, e, u, d;Room *p;Type_one* temp = new Type_one(0, 0);Game play;string file_name="map.txt";    // read file inifstream fin(file_name.c_str());if (fin.fail()) {cout<<"no find Map";return 0;}int fs;for(i=1;i<=9;i++)  //initialize rooms according to map{fin>>fs;switch(fs){case 1:fin>>s;p = new Type_one(i, s);  break;case 2:   fin>>n; fin>>s; fin>>e; fin>>u;p = new Type_two(i, n, s, e, u);  break;case 3:fin>>w;p = new Type_three(i, w); break;case 4:fin>>n; fin>>s;p = new Type_four(i, n, s); break;case 5:fin>>n;p = new Type_five(i, n); break;case 6:fin>>s; fin>>e; fin>>d;p = new Type_six(i, s, e, d); break;default: p = NULL;}if (p) play.addRoom(p);}fin.close();  srand(unsigned(time(0)));    // generate princess and demon randomlyran1 = (int)(rand()%8+2);ran2 = (int)(rand()%8+2);while(ran1 == ran2)ran2 = (int)(rand()%8+2);play.inputPrincess(ran1);play.inputDemon(ran2); //generate a random number from 2-9play.changeTag(1);  // start the gamecout << "Welcome to the lobby. There are 1 exits as: south." << endl;cout << "Enter your command:" << endl;while(1){play.getCommand();t = play.goToNext();while(1){if(t)break;elsecout << "The room doesn't exit! Please input again" << endl;play.getCommand();t = play.goToNext();}if(t == 1 && meet){cout << "congratulation! You win the game." << endl;break;}play.changeTag(t);ww = play.whatHappened(meet);if(ww == -1)break;else if(ww == 1)meet = 1;}return 0;}

The major problem I encountered is using the vector<Room*>, concerning the application of inheritance and polymophism.