A comparative study of Go language and C language

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1. Key words
2. Operator
3. Variable
4. Pointer
5. Function
1. return value
2. Closed Package
6. PO
7. Programming specifications
8. Oo
9. Concurrent
10. Project Management

For the markdown compiler does not have the automatic saving function this thing, I express serious disgust. One hours of tidying up to naught, and incredibly can not be imported into the HTML editor, really unbearable!

Key words

category	C	Go
Character	Char	No
String	No	String
Floating point number	Double, float	float32, Float64, complex64, complex128
Integer	int long Short	Uint8, UInt16, UInt32, UInt64, Int8, Int16, Int32, Int64, uint, int, uintptr, byte = Uint8, Rune=unit32
bool	No	Boolean true, False
Function	No	Func
Interface	No	Interface
Empty	void	No
Any	No	interface{}
Polymerization	Enum, struct, union	struct
Symbol Qualification Symbol	Signed, unsigned, auto, const, extern, register, Static, volatile	Auto, const
Process Control	Break, case, does, for, Goto, if, else, continue, default, return, switch, while	For, if, else, goto, break, switch, case, default, Fallthrough, range, select, Range
Data	No	Map
Other	sizeof, typedef	Iota, Var, type, defer, go Chan, package, import

Operator

function	C	Go
Take counter	~	^
Choose	? :
Fetching pointer content	->
Write read-out		<- ->
Initialize and assign values		:=

The rest of the operators are basically the same

Variable

X	C	Go
Declaration/definition	TYPE NAMEint i	(Var) NAME TYPEvar i int
Character (String)	char , char []	byte byte[], string
Shaping bit width	relies on specific platforms and compilers	You can specify a width, or you can rely on the platform compiler
Valid range	The variables opened up on the stack are valid in scope, and the variables that are opened on the heap are manually released before	The last reference is valid before it leaves the scope
Scope control	Static limit is valid for this file, extern looks for global variables for other files	Uppercase start can be exported, lowercase only for this package use

Pointer

The Assumption a is a pointer to a struct in which a member is called b .

C	Go
a->b	a.b

• The pointer & operator * and the pointer operator are the same.
• In the pointer comparison, nil in Go is equivalent to the C language of NULL.

Function

return value

C	Go
There can only be one	can have multiple

Like what:

func exchange( a  int , b int ) ( int , int ){ return b , a}

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Closed Package

C	Go
No	Yes

C-language functions and variables are two different concepts, and variables can only be identified by a function pointer in the form of a function.
The function of the Go language is also a variable.
Try the following code:

Package MainImport "FMT" func getfunc () func (int) int {i: = 0 //this variable is bound to the following return function return increment_i (J int) int {i + = j; return I}} func Main () {func_i1: = Getfunc () Func_i2: = Getfunc () // Above two call Getfunc, get two increment_i functions, each binding their own I variable for I: =0; I < 10; i++ {fmt. Println ( "FUNC1 print:", FUNC_I1 (i)) fmt. Println ( "FUNC2 print:", Func_i2 (I+1))}}    

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PO

X	C	Go
If	"if (condition) xxx else xxx" '	"' If condition {xxx} else {xxx} '
Switch	Can only choose to be converted to reshape, case without break automatically continue	Can be of any type and will not automatically continue unless Failthrough is used
Select	It's a function.	keyword, select chan
For	for (;;) Xxx	for; {XXX}
While	Yes	No
Do ... while	Yes	No

Programming specifications

• No semicolon required at the end of sentence
• The If for code snippet must be surrounded by curly braces
• If the condition not parentheses
• The for indication section does not have parentheses
• The left curly brace cannot be self-line

Oo

• Method
  Between the keyword Func and the function name the description belongs to that struct.

struct {    a int}func ( this * OOTest) GetAByPointer() int {    return this.a}func ( this OOTest) GetAByCopy() int { return this.a}

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• Interface
  defining interfaces, explaining function types

type IOOTest interface {    GetAByPointer() int }

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The interface object is assigned to the struct object pointer that implements the corresponding interface when used.

var i_test IOOTestvar test OOTest i_test = &test

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• Combination
  There's nothing to say.

• Inherit (by anonymous combination)

type OOTest1 struct{    OOTest b int}

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This OOTest1 will have OOTest the member variables and methods

Concurrent

X	C + +	Go
Realize	Threads that depend on the system interface	Go keyword, goroutine co-process
Lock	Rely on system supply or library or own implementation	Sync Pack
Communication	Shared Memory/Message	Message chan mechanism

Project Management

X	C + +	Go
Compiler	Self-selection	Comes with
Engineering Management	Self-selection	Comes with
Testing mechanism	Self-selection	Comes with
Unified encoding Format	Reliance on programmer Awareness	Tools for Unified Finishing

Original address

http://studygolang.com/wr?u=http%3a%2f%2fblog.csdn.net%2fcchd0001%2farticle%2fdetails%2f44982127