十个数字加和，并每新定义或析构一个对象都有显示

[c++]代码库

#include<iostream>
using namespace std;
class Data
{
private:
    int data;
public:
    Data()
    {
        data=0;
        cout<<"Data's default constructor."<<endl;
    }
    Data(int a)
    {
        data=a;
        cout<<"Data "<<data<<" is created."<<endl;
    }
   ~Data()
   {
       cout<<"Data "<<data<<" is erased."<<endl;
   }
   int getValue()
   {
       return data;
   }
   void setValue(int a)
   {
      data=a;
   }
};
class DataArray
   {
   private:
    Data da[10];
   public:
    DataArray()
    {
        cout<<"DataArray's default constructor."<<endl;
    }
    void setValues(int d[10])
    {
        int i;
        for(i=0;i<10;i++)
           da[i].setValue(d[i]);
    }
     int getSum()
     {
         int i,sum=0;
         for(i=0;i<10;i++)
             sum = sum + da[i].getValue();
         return sum;
     }
     ~DataArray()
     {
         cout<<"DataArray's deconstructor."<<endl;
     }
   };
int main()
{
    DataArray dataArray;
    Data *aData;
    int data[10], tmp;
    int i;
    for (i = 0; i < 10; i++){
        cin>>data[i];
    }
    dataArray.setValues(data);
    cout<<"Sum is "<<dataArray.getSum()<<endl;

    cin>>tmp;
    aData = new Data(tmp);
    cout<<"aData = "<<aData->getValue()<<endl;
    delete aData;
    return 0;
}