数组【进阶】

package main

import "fmt"

func main() {
    ////一维数组
    //var a [5]int = [5]int{1, 2, 3, 4, 5}
    ////for循环打印
    //for i := 0; i < len(a); i++ {
    //  fmt.Println(a[i])
    //}
    //b := [5]string{"A", "B", "C", "D", "E"}
    //bb := [...]string{"A", "B", "C", "D", "E"}
    //c := [...]string{"one", "two", "three", "four", "five"}
    //balance := [5]float32{1: 2.0, 3: 7.10} //指定下标 创建 其它下标会默认值进行赋值 [0 2 0 7 0]
    //fmt.Println(a)
    //fmt.Println(b)
    //fmt.Printf("%#v\n", b == bb) //true
    //fmt.Printf("%#v\n", c)       //程序计算出数组长度 [5]string{"one", "two", "three", "four", "five"}
    //fmt.Println(balance)         //[0 2 0 7.1 0]
    //balance[0] = 1
    ////balance[5] = 5 //会报错 超出数据长度  invalid argument: index 5 out of bounds [0:5]
    //fmt.Println(balance) //[1 2 0 7.1 0]
    //fmt.Println(len(c))  //数组长度 5
    //d := [...]struct {
    //  name string
    //  age  uint8
    //}{
    //  {"user1", 10}, // 可省略元素类型。
    //  {"user2", 20}, // 别忘了最后一行的逗号。
    //}
    //fmt.Printf("%#v\n", d)
    ////二位数组
    //var aa [3][3]int = [3][3]int{{1, 2, 3}, {2, 3, 4}, {3, 4, 5}}
    //for _, value := range aa {
    //  fmt.Println(value)
    //  for _, v := range value {
    //      fmt.Println(v)
    //  }
    //}
    //fmt.Printf("%#v\n", aa)
    //var bb [2][2]string = [...][2]string{{"A", "a"}, {"B", "b"}}
    //bb := [...][2]string{{"A", "a"}, {"B", "b"}}
    //fmt.Print(aa, bb)

    cc := [2]int{}
    fmt.Printf("a: %p\n", &cc) //a: 0xc000096080
    test(cc)
    fmt.Println("a:", cc) //a: [0 0]
    a := [...]int{1, 2, 3}
    println(len(a), cap(a)) //3 3
}

func test(x [2]int) {
    fmt.Printf("x: %p\n", &x) //x: 0xc0000960b0
    x[1] = 1000
    fmt.Println("x:", x) //x: [0 1000]
}