C# 0 The Complete Reference

PART I

C h a p t e r   9 :  

O p e r a t o r   O v e r l o a d i n g  

231

PART IPART I

The output from the program is shown here:

Here is a: 5, 6, 7

Here is b: 10, 10, 10

Here is c: 0, 0, 0

c is false.

a & b is true.

a & c is false.

a | b is true.

a | c is true.

In this approach, the 

&

,

|

, and 

!

 operator methods each return a 

bool

 result. This is necessary 

if the operators are to be used in their normal manner (that is, in places that expect a 

bool

result). Recall that for all built-in types, the outcome of a logical operation is a value of type 

bool

. Thus, having the overloaded versions of these operators return type 

bool

 is a rational 

approach. Unfortunately, this approach works only if you will not be needing the short-

circuit operators.