package main
import "fmt"
func main() {
//数组三种建立方式
var num [4] int //var 变量 [max_length] type
var num2=[10] int{
1,2,3,4} //var 变量=[max_length] type{} 初始化
num3:=[...] int{
1:2} // 变量:=[...] type{} 初始化
//数组三种打印方式
//1 println
fmt.Println(num)
fmt.Println(num2)
fmt.Println(num3)
//2 for
for i:=0;i<4;i++{
num[i]=i
fmt.Printf("%d ",num[i]) //0 1 2 3
}
fmt.Println()
//3 for := range
for index,value :=range(num2){
fmt.Printf("index=%d,value=%d ",index,value) //index=0,value=1 index=1,value=2 index=2,value=3 index=3,value=4 index=4,value=0 index=5,value=0 index=6,value=0 index=7,value=0 index=8,value=0 index=9,value=0
}
fmt.Printf("
-----------------------------------
")
//二维数组
var num4 [5][6] int
//num5 :=[3][2] int{
{1,2},{3,4},{5,6}}
for i:=0;i<len(num4);i++{
for j:=0;j<len(num4[0]);j++{
num4[i][j]=i+j
}
}
fmt.Println(num4) //[[0 1 2 3 4 5] [1 2 3 4 5 6] [2 3 4 5 6 7] [3 4 5 6 7 8] [4 5 6 7 8 9]]
fmt.Printf("
-----------------------------------
")
//字符串转数组(不常用)
etcd :="sdfsdferf"
var stringarr [10]string //创建空数组
for index,value := range etcd {
stringarr[index]= string(value)
}
fmt.Println(stringarr) //[s d f s d f e r f]
//字符串转切片
etcd2 :="sdfsdferf"
stringarr2 := make([]string,0) //创建空数组
for _,value := range etcd2 {
stringarr2=append(stringarr2, string(value))
}
fmt.Println(stringarr2) //[s d f s d f e r f]
//数组转字符串
stringarr3 := [...] string{
"abc","def","count"} //创建空数组
etcd3:=""
for _,value := range stringarr3{
etcd3+=value
}
fmt.Println(etcd3) //abcdefcount
}
