To use a pointer to the object, you need to use the ->* operator : object pointer « Class « C++ Tutorial

Home
C++ Tutorial
1.Language Basics
2.Data Types
3.Operators statements
4.Array
5.Development
6.Exceptions
7.Function
8.Structure
9.Class
10.Operator Overloading
11.Pointer
12.File Stream
13.template
14.STL Introduction
15.string
16.vector
17.list
18.bitset
19.set multiset
20.valarray
21.queue stack
22.deque
23.map multimap
24.STL Algorithms Modifying sequence operations
25.STL Algorithms Non modifying sequence operations
26.STL Algorithms Binary search
27.STL Algorithms Sorting
28.STL Algorithms Merge
29.STL Algorithms Min Max
30.STL Algorithms Iterator
31.STL Algorithms Heap
32.STL Algorithms Helper
C / ANSI-C
C Tutorial
C++
Visual C++ .NET
C++ Tutorial » Class » object pointer 
9.34.6.To use a pointer to the object, you need to use the ->* operator
#include <iostream>
using namespace std;
   
class MyClass {
public:
  MyClass(int i) { val=i; }
  int val;
  int double_val() { return val+val; }
};
   
int main()
{
  int MyClass::*data; // data member pointer
  int (MyClass::*func)()// function member pointer
  MyClass ob1(1), ob2(2)// create objects
  MyClass *p1, *p2;
   
  p1 = &ob1; // access objects through a pointer
  p2 = &ob2;
   
  data = &MyClass::val; // get offset of val
  func = &MyClass::double_val; // get offset of double_val()
   
  cout << "Here are values: ";
  cout << p1->*data << " " << p2->*data << "\n";
   
  cout << "Here they are doubled: ";
  cout << (p1->*func)() << " ";
  cout << (p2->*func)() << "\n";
   
  return 0;
}
9.34.object pointer
9.34.1.Use class pointer and class array together
9.34.2.Use & to get object address
9.34.3.Incrementing and decrementing an object pointer
9.34.4.Pointers as data members
9.34.5.Pointers to Class Members
9.34.6.To use a pointer to the object, you need to use the ->* operator
9.34.7.Use new to allocate memory for a class pointer
9.34.8.Passing References to Objects
9.34.9.normal functions accessed from pointer
9.34.10.Sort person objects using array of pointers
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.