C++ 装饰器 - 无法正常工作

Question

第一个问题已解决

正如下面的答案所说，我写错了

#ifndef ICETOWER_H
#define ICETOWER_H

我的 C++ 代码仍有一些问题。

我实现了一个装饰器模式，以 2* 的成本将基本塔升级为冰塔。但是当我运行它时，即使在装饰之后，它也显示出两座塔的相同规格。有人知道我做错了什么吗？

这是文件：

tower.h

#ifndef __TOWER_H__
#define __TOWER_H__

#include <iostream>
#include <string>
using namespace std;

class Tower {

private:

    string type;
    string effect;
    int cost;
    int sellTower;
    int damage;
    int range;
    int rate;

public:

    string getType() { return type; }
    string getEffect() { return effect; }

    int getCost() { return cost; }
    int getSale() { return sellTower; }
    int getDamage() { return damage; }
    int getRange() { return range; }
    int getROF() { return rate; }

    Tower();
    virtual ~Tower(){}
};

#endif __TOWER_H__

tower.cpp

#include "Tower.h"

Tower::Tower()
{
    // Tower Type
    this->type = "Basic";

    // Tower Special Effect
    this->effect = "None";

    // Tower Cost
    this->cost = 500;

    // Tower Sell Cost
    this->sellTower = 300;

    // Tower Damage inflicted
    this->damage = 50;

    // Tower Range (paths)
    this->range = 2;

    // Tower rate of fire
    this->rate = 0.5;
};

TowerDecorator.h

#ifndef __TOWERDECORATOR_H__
#define __TOWERDECORATOR_H__
#include <iostream>
#include <string>
#include "Tower.h"
using namespace std;

class TowerDecorator : public Tower {

private:

    Tower *decoratedTower;

public:

    TowerDecorator(Tower *decoratedTower)
    {
        this->decoratedTower = decoratedTower;
    }

    string type() { return decoratedTower->getType(); }
    string effect() { return decoratedTower->getEffect(); }

    int getCost() { return decoratedTower->getCost(); }
    int getSale() { return decoratedTower->getSale(); }
    int getDamage() { return decoratedTower->getDamage(); }
    int getRange() { return decoratedTower->getRange(); }
    int getROF() { return decoratedTower->getROF(); }

};

#endif __TOWERDECORATOR_H__

iceTower.h

#ifndef ICETOWER_H
#define ICETOWER_H

#include "TowerDecorator.h"

class IceTower : public TowerDecorator {

public:
    IceTower(Tower *decoratedTower) : TowerDecorator (decoratedTower){}

    int getCost(){return TowerDecorator::getCost() * 2;}
};

#endif __ICETOWER_H__

Driver.cpp

#include "Tower.h"
#include "TowerDecorator.h"
#include "IceTower.h"

void printTowerDetails(Tower* tower)
{
    cout << endl << "This is a " << tower->getType() << " Tower" << endl;
    cout << "Build Tower : " << tower->getCost() << " Coins" << endl;
    cout << "Sell Tower : " << tower->getSale() << " Coins" << endl;
    cout << "Tower Range : " << tower->getRange() << " paths" << endl;
    cout << "Tower Rate Of Fire : " << tower->getROF() << " p/s" << endl;
    cout << "Tower Special Effect : " << tower->getEffect() << "" << endl;
}

int main() {

    Tower *t1 = new Tower();

    printTowerDetails(t1);

    t1 = new IceTower(t1);

    printTowerDetails(t1);


}

输出：

图片：http://i.imgur.com/Ws018iV.png

Answer 1

至少有两个严重错误。 第一个是您检查带有后缀 _H__ 的清单常量的定义，但定义它们时不带后缀：

#ifndef __TOWER_H__
#define __TOWER__

和

#ifndef __TOWERDECORATOR_H__
#define __TOWERDECORATOR__

第二个是你忘了在TowerDecorator的类定义后面加分号

class TowerDecorator : public Tower {
//...
}

Answer 2

嗯，您遇到的第一个问题是您的包含防护有问题。应该是：

#ifndef __TOWER_H__
#define __TOWER_H__

您可能还有其他问题。

顺便说一句，您不应该使用以下划线开头的名称，因为它们是保留的。

Answer 3

你的标题不一致：-

#ifndef __TOWER_H__
#define __TOWER__

这应该是

#ifndef __TOWER_H__
#define __TOWER_H__

第二次改变这个

#endif __TOWER_H__

到

#endif