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// HasPtr.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
class U_Ptr {
friend class HasPtr;
int *ip;
size_t use;
U_Ptr(int *p): ip(p), use(1) { }
~U_Ptr ( ) { delete ip;}
};
class HasPtr {
public:
HasPtr(int *p, int i):ptr(new U_Ptr(p)), val(i) { }
HasPtr( const HasPtr &orig):
ptr(orig.ptr), val(orig.val) {++ptr->use;}
HasPtr& operator= (const HasPtr&);
~HasPtr() {if(--ptr->use == 0) delete ptr;}
int *get_ptr( ) const { return ptr->ip;}
int get_int ( ) const { return val; }
void set_ptr(int *p) { ptr->ip = p;}
void set_int ( int i) { val = i;}
int get_ptr_var() const { return *ptr->ip;}
void set_ptr_var(int i) { *ptr->ip = i;}
private:
U_Ptr *ptr;
int val;
};
HasPtr& HasPtr::operator=(const HasPtr &rhs)
{
++rhs.ptr->use;
if(--ptr->use == 0)
delete ptr;
ptr = rhs.ptr;
val = rhs.val;
return *this;
}
int _tmain(int argc, _TCHAR* argv[])
{
int c = 5;
int *cal = &c;
HasPtr a(cal,1);
HasPtr b(a);
return 0;
}