go学习

package main

import "fmt"

func main() {
f := make([][]int,5)  // 初始化

for i:=0; i<5; i++ {
f[i] = make([]int,6) // 多维slice 还得再初始化
for j:=0; j<6; j++ {
f[i][j] = 8
}
}

fmt.Println(f)

show(k,8,9)
}

func show(x func(int,int),i,j int) {   //函数做参数
x(i,j)
}

func k(a,b int) {
fmt.Println(a*b)

}

# go run a.go
[[8 8 8 8 8 8] [8 8 8 8 8 8] [8 8 8 8 8 8] [8 8 8 8 8 8] [8 8 8 8 8 8]]
72

package main

import "fmt"
import "strconv"

func main() {
k := map[int][]string{}  // key:value ==> int:[]string
k[1] = make([]string,5)  // init slice
k[2] = make([]string,5)
for i:=0;i<5;i++ {
k[1][i] = strconv.Itoa(i+i+100)  //数字到字符串
k[2][i] = string(i*i+60)  //直接这样是到单字符了
}
for _, b := range k {
fmt.Println(b)
}
fmt.Println(string(102))
fmt.Println(string(1020))
a := string(102)
fmt.Println([]byte(a)[0])
}

# go run z.go
[100 102 104 106 108]
[< = @ E L]
f
霞
102