packagemain

import"fmt"

funcmain(){

s:=[]string{"1","2","3","4","5","6","7","8","9"}//定義切片

fmt.Printf("%v\n",s)

s1:=s[0:5]

fmt.Printf("%v\n",s1)

s2:=make([]string,len(s1))

copy(s2,s1)//slicecanusecopy

fmt.Printf("%v\n",s2)

s2=s1//slicecanuseoperator=

fmt.Printf("%v\n",s2)

if&s1==&s2{

fmt.Println("thesilcesharethe
 
sameaddress")

}else{

fmt.Println("thesilcedoesnotsharethesameaddress")

}

if&s1==&s{

fmt.Println("thesilcesharethesameaddress")

}else{

fmt.Println("thesilcedoesnotsharethesameaddress")

}

typesliceTeststruct{

numberint

sliceNum[]string

}

varsliceTest1sliceTest

varsliceTest2sliceTest

sliceTest1.number=1

sliceTest1.sliceNum=s1

fmt.Printf("%v\n",sliceTest1)

sliceTest2=sliceTest1

fmt.Printf("%v\n",sliceTest2)

sliceTest3:=sliceTest1

fmt.Printf("%v\n",sliceTest3)

//varsliceTest4sliceTest

//copy(sliceTest4,sliceTest1)//compilerror:argumentstocopymustbeslices

//fmt.Printf("%v\n",sliceTest4)

}

C:/Go/bin/go.exe build -i [E:/staff/xc/1.12]

成功: 程序退出程式碼 0.

E:/staff/xc/1.12/1.12.exe [E:/staff/xc/1.12]

[1 2 3 4 5 6 7 8 9]

[1 2 3 4 5]

[1 2 3 4 5]

[1 2 3 4 5]

the silce does not share the same address

the silce does not share the same address

{1 [1 2 3 4 5]}

{1 [1 2 3 4 5]}

{1 [1 2 3 4 5]}

成功: 程序退出程式碼 0.

總結：

1.slice可以用copy和操作符=

2.結構體只能用=，不能用copy

3.雖然從silce中取一個小的slice的確是共用一個記憶體，但是他們採用指標的方式來進行指向，而指標的地址是不同的。

如下圖所示：

一個slice由三個部分構成：指標、長度和容量。