亚信联创20110917笔试题

,, assert(m_data != NULL); ,, strcpy(m_data,str); ,, } ,, } ,, ,, String::String(const String &other) //拷贝构造函数 ,？ { ,, m_data = new char[strlen(other.m_data)+1]; ,, assert(m_data != NULL); ,, strcpy(m_data,other.m_data); ,, } ,, ,, String::~String(void) //析构函数 ,, { ,, if(m_data != NULL) ,, { ,？ delete []m_data; ,, m_data = NULL; ,, } ,, } ,, ,, String & String::operator=(const String &other) //赋值函数 ,, { ,, if(&other == this) //如果对象与other是同一个对象 ,, return *this; ,, delete []m_data; //释放堆内存 ,？ m_data = new char[strlen(other.m_data)+1]; ,, assert(m_data != NULL); ,, strcpy(m_data,other.m_data); ,, return *this; ,, }