Shulou(Shulou.com)06/02 Report--

This article is mainly about "unary and binary operator overloading in C++". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn "unary and binary operator overloading in C++".

Operator overloading is to redefine an existing operator and give it another function to adapt it to different data types.

The essence of operator overloading: function overloading keyword: operator

Unary operator overloading

The unary operator is to operate on a number

When unary operator overloading uses member functions for overloading, there is no need to pass parameters to (). There is a hidden * this in ()

Overloading of minus operator

Define a Coordinate coordinate class that overloads the minus operator through member functions and friend functions, respectively.

Overload the minus operator through member functions:

# include

Using namespace std

/ * *

Unary operator overloading

Request:

Define a Coordinate coordinate class

Member functions: construction, getX, getY, data member: mSecretiX _ mcm _ iY

1. Negative operator overloading (member function, friend function)

2. + operator overloading (pre-+, post-+)

* * /

Class Coordinate

{

Coordinate (int x pencil int y)

/ / overload symbolic operators through member functions

Coordinate & operator- (); / / it is itself that asks him to return, so that he can operate on the minus operator again, so the return value is written as Coordinate &

Int getX ()

Int getY ()

Private:

Int m_iX

Int m_iY

}

Coordinate::Coordinate (int x pencil int y)

{

M_iX = x

M_iY = y

}

Int Coordinate::getX ()

{

Return m_iX

}

Int Coordinate::getY ()

{

Return m_iY

}

/ / member function to realize negative sign operator overloading

Coordinate & Coordinate::operator- ()

{

This- > m_iX =-(this- > m_iX); / / m_iX =-m_iX

This- > m_iY =-(this- > m_iY)

Return * this;// returns an object

}

Int main ()

{

Coordinate coor1 (1pr 3)

Cout

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