Airplane Simulator

[Betty1909]

    #include <algorithm>
    #include <cassert>
    #include <cstdint>
    #include <iostream>
    #include <iomanip>
    #include <string>
    #include <vector>


    // Use these constants for your arrays.
    const int MAX_ROWS   = 100;
    const int MAX_WIDTH  = 100;


    // Side of an airplane, port or starboard. These terms are more
    // precise than "left" and "right," which vary depending on whether
    // you're facing forward or backward.
    enum Side { 
       NotStowed = -1,
       Port, 
       Starboard 
    };

    class Passenger;


    // TODO: From here on, you need to implement all of the member functions and
    // add all of the member variables.
    // --------------------------------------------------------------------------

    // Represents a carryon bag owned by a passenger.
    // Each bag has a single owner.
    class Bag {
    public:
       // Owner is a pointer to a Passenger object. A bag is
       // initialized not "stowed," meaning that it hasn't been 
       // stored in an overhead bin.
       Bag(const Passenger* owner) { 
          assert(owner); 
       }

       const Passenger* owner() const { 
          return nullptr; 
       }

       // Return true if the bag is stowed.
       bool is_stowed() const { 
          return false; 
       }

       // Stow the bag at the given bin location. 
       void stow(Side side, int row) {
          assert(side != Side::NotStowed);
          assert(row >= 0); 
          assert(row < MAX_ROWS); 
       }

       // Getters for the stow location.
       Side side() const { return Side::NotStowed; }
       int row() const { return -1; }

    private:
       // TODO add member variables here.
    };

    // Represents one passenger, who may or may not have one carryon bag.
    class Passenger {
    public:
       // Create a passenger. id is a unique number which must be
       // positive. row and seat designate a seat location, which each must
       // also be positive. The passenger is created with no bags.
       //   
       // Row and seat are a zero based indices.
       Passenger(int id, int row, int seat) {}

       // getters
       int id() const { return -1; }
       int row() const { return -1; }
       int seat() const { return -1; }

       // Create a bag and assign it to this passenger.
       void bring_carryon() {}

       // Returns nullptr if passenger has no bags.
       Bag* carryon() { return nullptr; }

    private:
       // TODO add member variables here.
    };


    // Represents a model of airplane, use static arrays to store the Passengers and 
    // their carryons.
    class Airplane {
    public:
       // Initialize an airplane with a given number of rows of seats, and
       // width (number of passengers per row). Each argument must be
       // positive.
       Airplane(int rows, int width) {
          assert(rows >= 0);
          assert(rows < MAX_ROWS);
          assert(width >=0 );
          assert(width < MAX_WIDTH);

          // TODO: code that initializes the Airplane to an empty state.
       }

       int rows() const { return -1; }
       int width() const { return -1; }

       /*
       Prints out the passenger seating in a table.
       Each column is separated by a single space.
       The first column is 3 characters wide and displays the row number.
       The following columns are 6 characters wide and display the Seat numbers.
       The first line has the title of the printout "Seats"
       The second line are the column titles "Row Seat 1 Seat 2 Seat 3 Seat 4 Seat N".
       Empty seats display '------'.

       This is what a printout for an airplane with 10 rows, 4 wide, 36 passengers
       looks like:

       Seats
       Row Seat 1 Seat 2 Seat 3 Seat 4 
         1      1      2      3      4 
         2      5      6      7      8 
         3      9     10     11     12 
         4     13     14     15     16 
         5     17     18     19     20 
         6     21     22     23     24 
         7     25     26     27     28 
         8     29     30     31     32 
         9     33     34     35     36 
        10 ------ ------ ------ ------ 

       Please follow these instructions to make yours look just like this, 
       it'll make grading a lot easier for me.
       */   
       void PrintSeats() const {}


       /* Follow similar rules to above, print out the overhead bin configuration:

          Overhead Bins
          Row Port Starboard
            1   27   32 
            2   30   17 
            3   22   19 
            4 [  ] [  ]
            5 [  ] [  ]
            6 [  ] [  ]
            7 [  ] [  ]
            8 [  ] [  ]
            9 [  ] [  ]
           10 [  ] [  ]
       */
       void PrintOverheadBins() const {}


       // Attempt to place a passenger's carryon bag in an overhead bin.
       // Returns true if successful (or the passenger had no bag), 
       // false if there was a problem sotwing a bag.
       //
       // If the passenger has a carryon, try to find a location for it using the following
       // algorithm:

       // Try row 1 port side; if full, 
       // try row 1 starboard side; if full, 
       // try row 2 port side; if full, 
       // try row 2 starboard side; if full, 
       // try row 3 port side; etc. 
       //
       // The bag is stored in the plane's bin 2D array and 
       // the carryon's stow() function is called to record where the bag is.  
       bool place_carryon(Passenger* p) {
          assert(p);

          // No spot found.
          return false; 
       }   

       // Seat the passenger at the correct row and seat. 
       bool seat_passenger(Passenger* p) {
          assert(p);
          assert(p->row() >= 0);
          assert(p->row() < rows());
          assert(p->seat() >= 0);
          assert(p->seat() < width());

          return false;
       }


    private:
       // TODO add your member variables here.
    };


    // ---------------------------------------------------------------
    // There shouldn't be a need to edit any of the code from here on.
    // ---------------------------------------------------------------


    // Exits if not enough arguments were passed in at the command line.
    void checkArgs(int argc, char **argv) {
       if (argc != 5) {
          std::cerr << "usage: " << argv[0] << " <BAG CHANCE> <ROWS> <WIDTH> <PASSENGER COUNT>" << std::endl;
          exit(-1);
       }
    }

    // Turns the command line arguments into variables.  
    // Displays an error message and exits if any of the varaibles are out of range.
    void parseArgs(char** argv, int& bag_chance, int& rows, int& width, int& passenger_count) {
       bag_chance = atoi(argv[1]);
       if (bag_chance < 0) {
          std::cerr << "bag_chance must be >= 0" << std::endl;
          exit(-1);
       }

       rows = atoi(argv[2]);
       if (rows < 1 || rows >= MAX_ROWS) {
          std::cerr << "rows must be between 1 and " << (MAX_ROWS-1) << std::endl;
          exit(-1);
       }

       width = atoi(argv[3]);
       if (width < 1 || width >= MAX_WIDTH) {
          std::cerr << "width must be between 1 and " << (MAX_WIDTH-1) << std::endl;
          exit(-1);
       }

       passenger_count = atoi(argv[4]);
       if (passenger_count < 0) {
          std::cerr << "passenger count must be positive" << std::endl;
          exit(-1);
       }

       if (passenger_count > (rows * width)) {
          std::cerr << "There can't be more passengers (" << passenger_count << ") " 
                    << "than total seats (" << (rows * width) << ")." << std::endl;
          exit(-1);      
       }
    }


    void outputArgs(int bag_chance, int rows, int width, int passenger_count) {
       std::cout 
          << "Airline simulation:\n"
          << "   bag chance  : 1 in " << bag_chance << "\n" 
          << "   rows        : " << rows << "\n"
          << "   width       : " << width << "\n"
          << "   passengers  : " << passenger_count << "\n"
          << "\n";
    }


    // This is a table of 100 pseudo random integers 
    // in a distribution of 1-100.  This table is used
    // instead of a random number generator to ensure
    // that repeated runs on different systems will 
    // have identical results. 
    const size_t NUM_RAND = 100;
    const int RAND_TABLE[NUM_RAND] = {
        15,     98,     70,     35,     81, 
        89,     67,     35,     43,     77, 
        41,      3,     41,     50,     15, 
        79,    100,     97,      4,     87, 
        57,     84,     58,     19,     27, 
         5,     84,     27,     62,     56, 
        87,      4,     45,     67,     33, 
        22,     54,     43,     17,     80, 
         7,     35,     16,     29,     92, 
         9,     92,     21,      3,     96, 
         7,     36,     91,      3,     13, 
        94,     81,     39,     20,     29, 
        18,     87,      1,     92,    100, 
        15,     35,     16,     17,     60, 
        87,      2,     72,     12,      9, 
        79,     34,     19,     66,     48, 
        98,     23,     22,     96,     83, 
        35,     35,     19,     93,     93, 
       100,    100,     15,     33,     53, 
        13,     35,     79,     80,     47, 
    };


    // Make a vector of Passengers, increase their id, row and seat by one.
    // Randomly give the passengers bags.
    std::vector<Passenger*> newPassengers(int passenger_count, int width, int bag_chance) {
       std::vector<Passenger*> passengers;
       for (int id=0, row=0, seat=0; id < passenger_count; ++id) {
          passengers.push_back(new Passenger(id+1, row, seat));

          // Randomly give passengers bags based on bag_chance.
          if (RAND_TABLE[id % NUM_RAND] % bag_chance == 0)
             passengers.back()->bring_carryon();

          seat++;

          // If we hit the end of the row, bump the row, reset the seat.
          if (seat == width) {
             row++;
             seat = 0;
          }      
       }
       return passengers;
    }


    // Shuffle the passengers so that they board in a random order.
    // Use the table of random values so that everyone will get the exact same values.
    void shufflePassengers(std::vector<Passenger*>& passengers){
       for (int i = 0; i < passengers.size(); ++i) {
          const auto randNum = RAND_TABLE[i % NUM_RAND];
          std::swap(passengers[i], passengers[randNum % passengers.size()]);   
       }
    }


    // Prints out the boarding order 5 per line, displaying an asterisk next to 
    // passengers with baggage.
    void printBoardingOrder(const std::vector<Passenger*>& passengers) {
       std::cout << "Boarding order (* has carry-on):\n";
       auto count = 1;
       auto bagCount = 0;
       for(auto p : passengers) {
          std::cout << std::setw(3) << p->id() << (p->carryon() ? "* " : "  ");      
          if ((count % 5) == 0)
             std::cout << "\n";

          if (p->carryon())
             bagCount++;

          ++count;
       }
       std::cout << "\n";
       std::cout << "Passengers with bags: " << bagCount << " "
                 << "out of " << passengers.size() << " total.\n";
       std::cout << "\n";
    }


    // Attempts to place a passenger's carryon, then seat the passengers returns false on failure.
    bool boardPassengers(Airplane& airplane, const std::vector<Passenger*>& passengers) {
       bool halt = false;
       for (auto p : passengers) {
          if (!airplane.place_carryon(p)){
             std::cerr << "ERROR: bin full: "
                       << "   row  " << p->row() << "\n"  
                       << "   seat " << p->seat() << "\n";
             return false;  
          }

          if (!airplane.seat_passenger(p)){
             std::cerr << "ERROR: seat occupied: "
                       << "   row  " << p->row() << "\n"  
                       << "   seat " << p->seat() << "\n";
             return false;  
          }
       }

       std::cout << "\n";
       return true;
    }


    // Clean up by deleting all passengers allocated on the heap.
    void deletePassengers(std::vector<Passenger*>& passengers) {
       for (auto & p: passengers)
          delete p;
    }


    // This is the meat of this project.
    void runSimulation(int argc, char **argv) {
       // Get the variables from the user, display them.
       checkArgs(argc, argv);   
       int bag_chance, rows, width, passenger_count;
       parseArgs(argv, bag_chance, rows, width, passenger_count);
       outputArgs(bag_chance, rows, width, passenger_count);

       // Make, shuffle, print passengers.
       auto passengers = newPassengers(passenger_count, width, bag_chance);
       shufflePassengers(passengers);
       printBoardingOrder(passengers);

       // Make our plane, board it, print the results.
       Airplane plane(rows, width);
       const auto boarded = boardPassengers(plane, passengers); 
       plane.PrintSeats();
       plane.PrintOverheadBins();

       if (boarded)
          std::cout << "SUCCESS: all passengers boarded.\n\n";
       else
          std::cout << "FAILURE to board all passengers!\n\n";   

       // Clean up.
       deletePassengers(passengers);
    }


    // Hide the differences between compiling/running on IDEONE and locally.
    // Uncomment this to run on IDEONE
    // #define IDEONE
    #if defined(IDEONE)
    int main() {
       const auto argc = 5;
       const char* args[] = {
          "airplane", "4", "10", "4", "36"
       };
       char** argv = const_cast<char**>(&args[0]);
    #else
    int main(int argc, char** argv) {
    #endif

       runSimulation(argc, argv);
       return 0;
    }

[rubberman]

So, besides the additional lines of code here from your other post, what is your question. Also, please don't double post like this. Just edit the old post and add the new lines.

[Betty1909]

I do not understand how to do the private member variables.
Also, how the passanger seating works.