Overloading the increment operator : overload unary operator « Operator Overloading « 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 » Operator Overloading » overload unary operator 
10.8.2.Overloading the increment operator
#include <iostream>
 
 class MyType
 {
 public:
     MyType();
     ~MyType(){}
     int getValue()const 
        return myValue; 
     }
     void setValue(int x) {
        myValue = x; 
     }
     void Increment() { 
        ++myValue; 
     }
     const MyType& operator++ ();
 
 private:
     int myValue;
 };
 
 MyType::MyType():myValue(0){}
 
 const MyType& MyType::operator++()
 {
     ++myValue;
     return *this;
 }
 
 int main()
 {
     MyType i;
     std::cout << "The value of i is " << i.getValue() << std::endl;
     i.Increment();
     std::cout << "The value of i is " << i.getValue() << std::endl;
     ++i;
     std::cout << "The value of i is " << i.getValue() << std::endl;
     MyType a = ++i;
     std::cout << "The value of a: " << a.getValue();
     std::cout << " and i: " << i.getValue() << std::endl;
     return 0;
 }
The value of i is 0
The value of i is 1
The value of i is 2
The value of a: 3 and i: 3
10.8.overload unary operator
10.8.1.Overloading ++
10.8.2.Overloading the increment operator
10.8.3.Overload the ++ unary operator
10.8.4.Overload the postfix version of ++.
10.8.5.Demonstrate prefix and postfix ++
10.8.6.Overload prefix ++ for Point
10.8.7.Lvalues and rvalues
10.8.8.Using a Friend to Overload ++ or – –
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.