程序代写代做代考 ECS 40

6 typedef map SleeperMap;

4 class SleeperCar : PassengerCar // public, private, protected OK
{
2 SleeperMap passengerNames;
1 public:
1 SleeperCar(int number, int cap, int res)
6 :PassengerCar(2, number, cap, res){}
1 void addName(string name, short berth = 0) {
4 if(berth == 0)
3 berth = ++reserved;
7 passengerNames.insert(SleeperMap::value_type(name, berth));
}
1 void print(){
3 PassengerCar::print();
11 for(SleeperMap::iterator itr = passengerNames.begin();

itr != passengerNames.end(); itr++)
11 cout << " " << setiosflags(ios::left) << setw(20) << itr->first.c_str()

<< itr->second << endl; // c_str() may be omitted (but code won’t work) } 1 }; 1 #endif b) (10 points) Provide the implementation code for the Train class print() method. Pts 1 void Train::print() { 6 for(int i = 0; i < count; i++) 3 cars[i]->print();
}

c) (59 points) Provide the implementation code for the Train class >> operator. Note that you may not add any new methods to
either PassengerCar, or SleeperCar.

Pts
1 istream& operator>> (istream &is, Train &train) {
2 int type, number, capacity, reserved, berth;
2 string name, firstName;
6 while(is >> type >> number >> capacity >> reserved) {
3 if(type == 1)
9 train.cars[train.count++] = new PassengerCar(type, number, capacity,

reserved);
1 else {
7 SleeperCar *sleeperPtr = new SleeperCar(number, capacity, reserved);
5 for(int i = 0; i < reserved; i++) { 4 is >> berth >> name >> firstName;
3 name += ” ” + firstName;
7 // or is >> berth; getline(is, name);
4 sleeperPtr->addName(name, berth);
}
4 train.cars[train.count++] = (PassengerCar*) sleeperPtr;
}
} // while more in file
1 return is;
}
d) (20 points) Provide the implementation code for the Train class += operator. Note that the added passengers must be added to a

Normal car that has room available to seat all of them.
Pts
2 void Train::operator+= (int number) {
6 for(int i = 0; i < count; i++) 8 if(cars[i]->getType() == 1 && cars[i]->getAvailable() >= number) {
3 cars[i]->addPassengers(number);
1 break;
} // if
} // operator+=

e) (25 points) If the array of PassengerCar pointers, cars, in the Train class was replaced with a TrainListNode *head, provide the
implementation code for the Train class addSleeper()method. Note that the added passenger must be added to a Sleeper car that
has a berth available for the passenger. You may assume that somewhere on the train there is a Sleeper berth available for the
passenger. TrainListNode has the following definition.
class TrainListNode
{
PassengerCar *info;
TrainListNode *next;
public:
TrainListNode(PassengerCar &in, TrainListNode *n);
friend class Train;
};

Pts
1 void Train::addSleeper(string &name) {
8 for(TrainListNode *ptr = head; ptr; ptr = ptr->next)
10 if(ptr->info->getType() == 2 && ptr->info->getAvailable() >= 1) {
5 ((SleeperCar*)ptr->info)->addName(name);
1 break;
}
}

6. (190 points) There are two formats to the lines in train.txt. For every car
there is a line describing it: type , 2) number, 3) capacity; and 4)
number of seats already reserved. For type 2 cars, sleepers, the description
line is followed by a list of passengers and their assigned berths: 1) berth
, and 2) name . There is one of these lines for each reserved
berth. You may assume that berths are filled sequentially, but the list may be
in any order in the file.

% cat train.txt
1 8364 32 29
2 7920 12 5
4 Nixon, Richard
2 Carter, Jimmy
3 Carter, Rosalyn
1 Reagan, Ronald
5 Carter, Amy
1 4329 36 20

[davis@pc31 finalA]$ a.out
Your choice (0 = Done, 1 = Add Normal
Passengers, 2 = Add Sleepers): 1
Number of passengers: 1
Your choice (0 = Done, 1 = Add Normal
Passengers, 2 = Add Sleepers): 2
Number of passengers: 2
Name: Clinton, William
Name: Bush, George
Your choice (0 = Done, 1 = Add Normal
Passengers, 2 = Add Sleepers): 1
Number of passengers: 4
Your choice (0 = Done, 1 = Add Normal
Passengers, 2 = Add Sleepers): 0
8364 32 30
7920 12 7
Bush, George 7
Carter, Amy 5
Carter, Jimmy 2
Carter, Rosalyn 3
Clinton, William 6
Nixon, Richard 4
Reagan, Ronald 1
0123456789012345678901234567890 // Added by
Sean for formatting purposes.
4329 36 24
[davis@pc31 finalA]$

int main()
{
Train train;
int choice, number;
string name, dummy;
ifstream inf(“train.txt”);
inf >> train;

do {
cout << "Your choice (0 = Done, 1 = Add Normal Passengers, 2 = Add Sleepers): "; cin >> choice;
if(choice)
{
cout << "Number of passengers: "; cin >> number;
getline(cin, dummy); // eats up ‘
’
if(choice == 1)
train += number;
else // choice == 2
for(int i = 0; i < number; i++) { cout << "Name: "; getline(cin, name); train.addSleeper(name); } // for each passenger } // if choice } while(choice); train.print(); return 0; } In PassengerCar.h you would find: class PassengerCar { protected: short type; // 1 = Normal, 2 = Sleeper int carNumber; int capacity; int reserved; public: PassengerCar(short ty, int number, int cap, int res):type(ty), carNumber(number), capacity(cap), reserved(res){} virtual ~PassengerCar(){} virtual void print() {cout << carNumber << " " << capacity << " " << reserved << endl;} short getType()const {return type;} int getAvailable()const {return capacity - reserved;} void addPassengers(int n){reserved += n;} }; In Train.h you would find: class Train { PassengerCar *cars[10]; int count; public: Train():count(0){}; void operator+= (int number); void addSleeper (string &name); friend istream& operator>> (istream
&is, Train &train);
void print();
};