打印A-Z

package main

import "fmt"

func main() {

	var arr01 [26]byte

	for i := 0; i < len(arr01); i++ {
		arr01[i] = 'A' + byte(i)
	}
	for i := 0; i < len(arr01); i++ {
		fmt.Printf("%c ", arr01[i])
	}
}

找出数组中的最大值以及它的下标

package main

import "fmt"

func main() {

	var num [5]int = [5]int{1, 5, 9, 4, 8}
	var max int = 0
	var maxi int = 0
	for i := 0; i < len(num); i++ {

		if max < num[i] {
			max = num[i]
			maxi = i
		}

	}
	fmt.Printf("数组的最大值为 %v, 其下标为 %v", max, maxi)
}

求数组的和以及平均值

package main

import "fmt"

func main() {

	var myarr [10]int = [10]int{1, 9, 13, 5, 78, 99, 51, 21, 33, 44}
	var sum int
	var avgMyarr float64
	for _, value := range myarr {

		sum = sum + value
	}
	fmt.Println("数组的和为 ", sum)
	avgMyarr = float64(sum) / 10
	fmt.Println("数组的平均值为 ", avgMyarr)
}