Read the "C # Primer Classic"

C # is also regarded as halfway decent, the foundation is not very good, these days to learn a bit of the "C # Introductory Classic," is a cornerstone of the. The first three chapters have been read, today began to read the fourth chapter.


§1 C # Introduction

§2 Write C # programs

§3 Variables and expressions

§4 Process Control


Branches, loops

§4.1 Boolean logic

Boolean Compare relational operators
=,!=, <=, >=

BOOL IsLessThan10;
IsLessThan10 = Myval < 10;

! Logical non
& Logic and
| Logical OR
^ Logical XOR or


&&,| | Better performance: First check the value of the first operand, the second may not need to check

1. Bitwise operators
and; | These two operators can be used to perform operations on numeric values, in fact, they are dealing with a series of bits stored in a variable, not the value of a variable
^
~ Take the Counter
>>,<< v1 = v2 >> v3; The value of V1 is obtained by moving the binary value of the V2 to the right v3 bit.
2. Boolean assignment operator
&= Use & &&
|= Use | rather than | |
^=
>>=
<<=
3. Precedence update of Operators
High + +,--, (for prefix); (); +,-(one yuan);!; ~
*, /, %
+, -
<&lt, >>
| >,<=, >=
| ==, !=
| &
| ^
|
&&
||
=, *=,/=,%=, + =, =, <<=, >>=, &=, ^=, |=
Low + +,--(used as suffix)