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使用病媒进行分类
原标题:Aggregation using vector

我这样说了吗?

 Class A
{
  private:
           vector <B *> pB;
  public:
           A();
           A(int tag);
           ~A();
  }

  A::A(int tag){
     for (i=0; i != tag, i++)
     pB.push_back(new B());
  }

为了创造并非一个整体,而是一个构成,我只必须在主人中增加:

A::~A(){
       vector <B *>::iterator citer = pB.begin();
        while (citer != pB.end())
        delete *(citer++);
        pB.clear();
 }

is it right? Thank you

最佳回答

你再次找不到接触你的点人的方法。

B* getPtr(int iP) {
    if(iP<pB.size()) {
        return pB.at(iP);
    }
    return NULL
}

删除名单的单一点:

void delPtr(int iP) {
    if(iP<pB.size()) {
       delete pB.at(iP);
       pB.erase(pB.begin()+iP);
    }
 }
问题回答

我想到的是aggregation。 如果是这样的话,你就应当有办法在病媒中添加物体,而不是在构造中添加物体。

然后,<代码>A类别的用户必须正确管理物体寿命。

现在,你关于aggregation的代码不正确。 你有明显的记忆泄露。





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