main.cpp

ssd5 答案 exam2 希望能对大家有帮助

#pragma warning(disable:4786)

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
#include <stack>
#include <stdexcept>
#include <vector>
#include <algorithm>

#include "car.h"

using namespace std;

const int PARKING_SPOTS_PER_AISLE = 3;
const int NUMBER_OF_AISLES = 5;

void handle_arrival(vector<Car>&, vector<stack<string> >&, const string&);
void handle_departure(vector<Car>&, vector<stack<string> >&, const string&);
Car& find_car(vector<Car>&, string);

int main(int argc, char* argv[]) {

    try {

        if (argc != 2) {
            cerr << "Usage:\n" << argv[0] << " data-file";
            return EXIT_FAILURE;
        }    

        ifstream inf(argv[1]);
        if (! inf) {
            cerr << "Could not open " << argv[1];
            return EXIT_FAILURE;
        }

		vector<Car> cars;
		vector< stack<string> > parking_lot(NUMBER_OF_AISLES);

        while (! inf.eof()) {
        
            string action, plate;
            inf >> plate >> action;
        
            if (action == "arrives") {
                handle_arrival(cars, parking_lot, plate);
            } 
            else if (action == "departs") {
                handle_departure(cars, parking_lot, plate);            
            } else {
                cerr << "Unknown action: " << action << endl;
            }
        
        }
        inf.close();    

        cout << "\nHere are all the cars that visited the lot today:\n";

        // TODO: Output the license plates of all the
        // cars that visited the lot, in alphabetical order	
		sort(cars.begin() , cars.end()) ; 
		vector<Car>::iterator it = cars.begin() ; 
		for(; it != cars.end() ; it++)
			cout << it->getPlate() << endl ; 
		
		//delete memory where car stand on. 
		for(int i = 0 ; i < cars.size() ; i++){
			Car& car = cars[i] ;
			delete &car ; 			
		}
		
        return EXIT_SUCCESS;
        
    }
    catch (exception& e) {
        cerr << e.what() << endl;
    }
    catch (...) {
        cerr << "Unknown exception caught!" << endl;
    }
    
    return EXIT_FAILURE;
}

void handle_arrival(vector<Car>& cars, vector< stack<string> >& parking_lot, const string& plate) {

    // TODO: Handle car arrivals
	for(int i = 0 ; i < parking_lot.size() ; i++){
		if(parking_lot[i].size() < 3){
			parking_lot[i].push(plate); 
			Car* c = new Car(plate , i) ; 
			cars.push_back(*c) ; 
			break ; 
		}
	}
	
	//if all ailses are full , indicate following message.
	if(i >= parking_lot.size())
		cout << "Sorry " << plate << ", the parking lot is full " << endl ; 
	

}

void handle_departure(vector<Car>& cars, vector< stack<string> >& parking_lot, const string& plate) {

    // TODO: Handle car departures
	Car c = find_car(cars , plate) ; 
	stack<string> tempStack ; 
	int ailse = c.getAisle() ; 
	//push plate of car that is not equal parameter plate to temporarily stack.
	//and add 1 to moved times.  
	while(parking_lot[ailse].top() != c.getPlate()){
		string p = parking_lot[ailse].top() ; 
		tempStack.push(p) ;
		parking_lot[ailse].pop() ;
		Car& car = find_car(cars, p) ;
		int times = car.getTimesMoved() ; 
		car.setTimesMoved(++times); 
	
	}
	//remove the plate of car that departs from stack. 
	parking_lot[ailse].pop() ;
	cout << c.getPlate() << " was moved " << c.getTimesMoved() 
		 << " times while it was here " << endl ; 
	
	//push plates of car that was moved to temporarily stack to former stack.
	while(!tempStack.empty()){
		string s = tempStack.top() ; 
		parking_lot[ailse].push(s) ; 
		tempStack.pop() ; 
	
	}

}

Car& find_car(vector<Car>& cars, string plate) {

	// TODO: Return a reference to the 
	// the Car object whose license plate equals 
	// the parameter 'plate'
	Car car(plate) ; 
	vector<Car>::iterator it ; 
	it = find(cars.begin() , cars.end() , car) ; 
	return *it ; 	 

}