有关指针 -> 和* 的重载

 1， #include<iostream>
  2 #include<string>
  3 using namespace std;
  4 class test{
  5         int i;
  6 public:
  7         test(int i){
  8                 cout << "test(int i)" << i << endl;
  9                 this->i = i;
 10         }
 11         int get(){
 12                 return i;
 13         }
 14         ~test(){}
 15 };
 16 class pointer{
 17         test* mp;
 18 public:
 19         pointer(test*p = NULL){
 20                 mp = p;//成员变量赋值
 21         }
 22         test* operator->(){
 23                 return mp;
 24         }
 25         test& operator*(){
 26                 return *mp;
 27         }
28         ~pointer(){
 29                 cout << "~pointer()" << endl;
 30                 delete mp;
 31         }
 32 };
 33 int main(){
 34         for(int i=0;i<5;i++){
 35                 pointer p = new test(i);
 36                 cout << p->get() << endl;
 37         }
 38         return 0;
 39 }
//结果
test(int i)0
0
~pointer()
test(int i)1
1
~pointer()
test(int i)2
2
~pointer()
test(int i)3
3
~pointer()
test(int i)4
4
~pointer()