안녕하세요. 나는 나쁜 소식이 있습니다. 나는 무엇이 계속되고 있는지 모릅니다.추상 유형 재정의 객체가 작동하지 않을 수 있습니까?
나는 많은 StarWarsShip 개체와 많은 StarTrekShip 개체를 만들어 링크 된 목록에서 서로 싸우려 고하고있다. 지루한 세부 정보를 건너 뛰는 C++은 초록이기 때문에 StarWarsShip/StarTrekShip 객체를 만들지 않습니다. 몇 가지 Google 검색의 의미를 모호하게 알고 있습니다.
어쨌든 여기에 몇 가지 코드입니다 :
StarWarsShip.h
#include "SpaceShip.h"
class StarWarsShip : public SpaceShip
{
private:
string uni; //this ship is in the star wars universe
string pilot; //this is the captains name
int atp; //this is how much damage the ship will do
int hullM; //this is the strength of the ship initially
int hullC; //this integer keeps track of how much more damage the ship can take
bool shields; //are the shields up?
//string shipDeath; //The message that will display when the ship is destroyed
string lastWords; //The last words of the Star Wars pilot
public:
StarWarsShip();
~StarWarsShip();
void setStats(string P, int atPwr, int hullMax, bool shlds, string LW); //sets stats of the ship
string getLeader(); //returns the name of the pilot
int getAttackPower(); //returns how much attack power the ship has
int getCurrentHull(); //returns how much health the hull still has? hull? health? hullth?
int getMaxHull(); //gets the maximum hull value of the ship
bool takeDamage(int amount); //takes damage if the ship has the hull value to handle it
bool getShields(); //lets the object know if the shields are down
string getUniverse();//ship is in the star wars universe
//string getStatus(); //prints the status of the ship
//string finalMessage(); //prints the final message of the ship
};
#endif
SpaceShip.h
class SpaceShip
{
public:
virtual ~SpaceShip() {};
virtual string getLeader() const = 0;
virtual int getAttackPower() const = 0;
virtual int getCurrentHull() const = 0;
virtual int getMaxHull() const = 0;
virtual bool takeDamage(int amount) const = 0;
virtual bool getShields() const = 0;
virtual string getUniverse() const = 0;
//virtual string getStatus() const = 0;
//virtual string finalMessage() const = 0;
};
#endif
FlightManager.cpp (그러나 단지 생성자)
#include "FlightManager.h"
using namespace std;
FlightManager::FlightManager(string fileName)
{
ifstream inFile(fileName);
if (inFile.is_open())
{
cout << "File found. Reading in...\n";
}
else
{
//quit
}
//now i read in stuff from a file, not actually important
while (getline(inFile, line))
{
//declare temp variables that will be used to parse and organize data
string tUniverse;
string tLeader;
string tATP;
string tPar4;
string tPar5;
string tPar6;
//begin parsing list of data and compiling into objects
char c;
int j = 0;
for(char&c : line)
{
if(c == ',') j++;
else if (c == ' ')
{
tPar6 += c;
continue;
}
else if (j == 0) tUniverse += c;
else if (j == 1) tLeader += c;
else if (j == 2) tATP += c;
else if (j == 3) tPar4 += c;
else if (j == 4) tPar5 += c;
else if (j == 5) tPar6 += c;
}
//Declare a new ship object each time a new line is parsed
//Add the ship to the list of ships
if (tUniverse == "StarWars")
{
//NEXT LINE BIG ERROR YIKES
StarWarsShip newShip = new StarWarsShip();
newShip.setStats(tLeader, stoi(tATP), stoi(tPar4), toBool(tPar5), tPar6);
//Parameters are : void StarWarsShip::setStats(string P, int atPwr, int hullMax, bool shlds, string LW)
//input format is <universe>,<captain name>,<attack power>,<number of crew>,<max hull value>,<shield status>
spaceBattle.addBack(newShip);
}
else
{
//NEXT LINE BIG ERROR YIKES
StarTrekShip* newShip = new StarTrekShip();
newShip->setStats(tLeader, stoi(tATP), stoi(tPar4), stoi(tPar5), toBool(tPar6));
//Parameters are : (string C, int atPwr, int crewNumber, int hullMax, bool shlds)
//input format is <universe>,<captain name>,<attack power>,<number of crew>,<max hull value>,<shield status>
spaceBattle.addBack(newShip);
}
length = spaceBattle.getLength();
if(inFile.eof())
{
break;
}
}
inFile.close();
}
그리고 내 오류 :
FlightManager.cpp:66:49: error: cannot allocate an object of abstract type ‘StarWarsShip’
StarWarsShip newShip = new StarWarsShip();
In file included from FlightManager.h:10:0,
from FlightManager.cpp:8:
StarWarsShip.h:16:7: note: because the following virtual functions are pure within ‘StarWarsShip’:
class StarWarsShip : public SpaceShip
^
In file included from StarWarsShip.h:14:0,
from FlightManager.h:10,
from FlightManager.cpp:8:
SpaceShip.h:18:18: note: virtual std::string SpaceShip::getLeader() const
virtual string getLeader() const = 0;
그리고 나서 코드가 로스팅됩니다. StarWarsShip 클래스를 추상화하지 않아야합니까? 그렇다면 무엇이 잘못 되었습니까?
또한 오버라이드를 사용하려고했지만 메서드 정의가 끝날 때 "오버라이드"를 추가하려고 시도했을 때 단순히 오버라이드하지 못했다고 말했습니다. – Emrylin
StarWarsShip은 모든 SpaceShip 순수 가상 기능을 구현해야합니다. 그렇지 않으면 새로운 기능을 구현할 수 없습니다. 그리고 순수 가상 funciotn은 const 접미사를 가지고 있다는 것을 잊지 마십시오. –
아 감사합니다. StarWarsShip 메서드에 const를 추가했지만 이제는 다른 오류가 발생합니다. FlightManager.cpp : 66 : 49 : 오류 : 'StarWarsShip *'에서 비 스칼라 유형 'StarWarsShip'으로의 변환이 요청되었습니다. StarWarsShip newShip = new StarWarsShip(); – Emrylin