Go语言基础学习之数组的使用详解_Golang

// eg: 定义一个长度为 10 的 int 数组
var a [10]int

var variable_name [SIZE] variable_type

balance := [5]float32{3.14, 13.0, 33.4, 15.0, 20.0}

balance := [...]float32{3.14, 13.0, 33.4, 15.0, 20.0}

//  将索引下标为 1 和 3 的元素初始化
balance := [5]float32{1:2.0,3:7.0}

package main

import (
    "fmt"
)

var array1 [5][3]int
var array2 [2][3]int = [...][3]int{{10, 20, 30}, {4, 5, 6}}

func main() {
    arr1 := [2][3]int{{10, 11, 12}, {20, 21, 22}}
    arr2 := [...][2]int{{10, 11}, {20, 21}, {30, 31}}
    fmt.Println(array1, array2)
    fmt.Println(arr1, arr2)
}

func main() {
    var users = [...]string{"张三", "李四", "王五"}

    // 方法1：for range遍历
    for index, item := range users {
        fmt.Println(index, item)
    }
    
    // 方法2：for循环遍历
    for i := 0; i < len(users); i++ {
        fmt.Println("姓名：", users[i])
    }

}

func main() {
    var f [2][3]int = [...][3]int{{10, 20, 30}, {4, 5, 6}}
    
    for k1, v1 := range f {
        for k2, v2 := range v1 {
            fmt.Printf("(%d,%d)=%d ", k1, k2, v2)
        }
        fmt.Println("-------------")
    }
}

package main

import "fmt"

func printArr1(arr *[5]int) {
    // 数组指针
    arr[0] = 1000
}

func printArr2(arr [5]int) {
    arr[0] = 1000
}

func main() {
    arr1 := [5]int{100, 200, 300, 400, 500}
    printArr1(&arr1)
    fmt.Println(arr1)
    
    arr2 := [...]int{2, 4, 6, 8, 10}
    printArr2(arr2)
    fmt.Println(arr2)
}