淺拷貝：簡單的賦值拷貝操作
深拷貝：在堆區(qū)重新申請空間，進行拷貝操作

class Person {
public: 
int m_age;
int *m_height;
  // 無參（默認）構(gòu)造函數(shù)
  Person(){
  cout <<"無參構(gòu)造函數(shù)" << endl;
  }
  // 有參構(gòu)造函數(shù)
   Person(int age, int height){
  cout << "有參構(gòu)造函數(shù)！"  endl;
  m_height = new int(height);
  m_age = age;
  }
~Person()
{
 // 析構(gòu)代碼，將堆區(qū)開辟數(shù)據(jù)做釋放操作
  if (m_height != Null)
  {
  delete m_height;
  //為了防止出現(xiàn)野指針，我們將其置空
  m_height = Null;
  }
 }
}