![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Code
class CData
{
public:
CData(int iLeng);//普通构造函数
CData(){ m_iLeng = 0 ; m_pData = NULL ;};
~CData();//析构函数
CData(const CData& other);//拷备构造函数
CData& operator =(const CData &other);//赋值函数
private:
int m_iLeng; //动态数组长度
int * m_pData ;//动态数组
};
int main(int argc, char* argv[])
{
CData data1(3) ,data4(4);
CData data2(data1);//拷备构造函数
CData data3 = data1 ;//拷备构造函数
data4 = data1 ; //赋值运算符
return 0;
}
CData::CData(int iLeng)
{
m_iLeng = iLeng ;
m_pData = new int[m_iLeng] ;
}
CData::~CData()
{
delete [] m_pData ;
}
CData::CData(const CData &other)
{
m_iLeng = other.m_iLeng ;
m_pData = new int[m_iLeng];
memcpy(m_pData,other.m_pData,m_iLeng*sizeof(int));
}
CData& CData::operator =(const CData &other)
{
//检查自赋值
if(this == &other)
return *this ;
//释放原有的内存资源
delete [] m_pData ;
//分配内存并复制内容
m_iLeng = other.m_iLeng ;
m_pData = new int[m_iLeng];
memcpy(m_pData,other.m_pData,m_iLeng*sizeof(int));
//返回本对象的引用
return *this ;
}
posted @
2009-07-30 14:16
狼窝
阅读(
128)
评论()
编辑
收藏
举报