数组-参考答案

【练习1】数组中的基本操作

package main

import "fmt"

func main(){
    var a [5] int
    fmt.Println("emp", a)

    a[4] = 100
    fmt.Println("set:", a)
    fmt.Println("get:", a[4])

    fmt.Println("len:", len(a))

    b := [5]int{1,2,3,4,5}
    fmt.Println("dcl:", b)
    
    var twoD [2][3]int
    for i := 0; i < 2; i++{
        for j := 0; j<3; j++{
            twoD[i][j] = i + j
        }
    }
    fmt.Println("2d:", twoD)

}

【练习2】求数组中的最大值

package main

import (
    "fmt"
)

func main(){
    var balance = []int {1000, 2, 3, 17, 50}
    var avg float32

    avg = getAverage( balance, 5)

    fmt.Println(avg)

    balance2 := []int{2,3,4,43,5,67,666}

    fmt.Println(getMax(balance2))

}

func getAverage(arr []int, size int) float32  {
    var i, sum int
    var avg float32

    for i = 0; i < size; i++ {
        sum += arr[i]
    }

    avg = float32(sum) / float32(size)

    return avg;
}

func getMax(arr []int) int  {

    var i, max int
    max = arr[0]
    for i = 1; i < len(arr); i++ {
        if max < arr[i] {
            max = arr[i]
        }
    }
    return max
}