求助：类的拷贝构造和赋值构造的写法

[snfttd29]

求助：关于含有指针变量和动态指针数组的类的拷贝构造和赋值构造的写法

请教一下，下面两个类的拷贝构造和赋值构造分别怎么写？

不胜感激！！！！

class A

{
private:
A(int v = 8):data( new int (v) ) { }
~A(){delete data;}
public:
int *data;
};

class B
{
private:
A(int sz = 100):max(sz), element( new int [max] ) { }
~A(){delete []element;}
public:
size_t max;
int *element;

}

[linsj585]

#include <iostream>
using namespace std;
class A

{
public://跟下面的private对调
A(int v = 8):data( new int (v) ) { }
~A(){delete data;}

private:
int *data;
};

class B
{
public://对调
B(int sz = 100):max(sz), element( new int [max] ) { } //是B……
~B(){delete []element;}
private:
size_t max;
int *element;

};//加分号

[pengzhixi]

拷贝构造函数注意深拷贝，赋值运算符注意检查是不是给自身赋值。

[zht_304]

请参考C++ PRIMER 。。。

[selooloo]

#include <iostream>
using namespace std;

class A

{
public://¸úÏÂÃæµÄprivate¶Ôµ÷
  A(int v = 8):data( new int (v) ) { }
    ~A(){delete data;}
    A(const A& t);
 A operator =(A &t);
 friend ostream& operator <<(ostream &os,A& t);
private:
  int *data;
};
A::A(const A& t)
{
        data=new int();
        *data=*(t.data);
}
 A A::operator =(A &t)
 {
       if(this==&t)
       return *this;
       *data=*(t.data);
       return *this;
 }
 ostream& operator <<(ostream &os,A& t)
 {
          os<<*(t.data);
          return os;
 }
class B
{
 public://¶Ôµ÷
B(int sz = 100):max(sz), element( new int [max] ) {for(int i=0;i<max;++i) element[i]=0; } //这里改了下
~B(){delete []element;}
B(const B& t);
 B operator =(B &t);
 friend ostream& operator <<(ostream &os,B& t);
 private:
size_t max;
int *element;

};//

B::B(const B& t)
{
        element=new int[t.max];
        max=t.max;
        memcpy(element,t.element,t.max*sizeof(int));
}
B B::operator =(B &t)
 {
       if(this==&t)
       return *this;
       if(max<t.max)
       {
       delete []element;
       element=new int[t.max];
       }
       max=t.max;
       memcpy(element,t.element,t.max*sizeof(int));
       return *this;
 }
 ostream& operator <<(ostream &os,B& t)
 {
          for(int i=0;i<t.max;++i)
          os<<t.element[i]<<" ";
          return os;
 }
int main(void)//测试
{
    A a,b(98),c(b);
    B ba(5),bb(ba),bc(10);
    cout<<"a : "<<a<<endl;
    cout<<"b : "<<b<<endl;
    cout<<"c : "<< c<<endl;
    b=a;
    cout<<"b : "<<b<<endl;
    cout<<"ba: "<<ba<<endl;
    cout<<"bb: "<<bb<<endl;
    cout<<"bc: "<<bc<<endl;
    bc=ba;
    cout<<"bc: "<<bc<<endl;
    system("pause");
    return 0;
}