day5.am--拷贝构造与拷贝赋值

 

 

 1 Array& operator = Array(Array const& that){
 3         //避免自赋值
 4         if(&that != this){
 5             //释放旧资源
 6             if(m_array)
 7             {
 8                 delete[] m_array;
 9                 m_array = NULL;
10             }
11             //分配新资源
12             m_array = new int[that.m_size];
13             //拷贝新内容
14             memcpy(m_array, that.m_array, that.m_size * sizeof(that.m_array[0]));
15             m_size = that.m_size;
16         }
17         //返回自引用
18         return *this; 
19 }

 

posted @ 2019-03-29 09:43  鸿蒙过客  阅读(99)  评论(0)  编辑  收藏  举报