package main

import "fmt"

func printSlice(x []int) {
	fmt.Printf("len=%d cap=%d slice=%v\n", len(x), cap(x), x)
}

func main() {
	//创建切片
	nums := []int{0, 1, 2, 3, 4}

	//打印切片
	fmt.Println(nums)

	//提取新的切片
	nums1 := nums[0:1]
	fmt.Println(nums1)

	//打印切片首部元素
	fmt.Println(nums[0])

	nums2 := nums[:2]
	nums3 := nums[2:]
	fmt.Println(nums2)
	fmt.Println(nums3)

	//增加切片内容
	var nums4 []int
	printSlice(nums4)
	nums4 = append(nums4, 0)
	printSlice(nums4)
	nums4 = append(nums4, 1, 2, 3, 4, 5, 6)
	printSlice(nums4)

	//拷贝切片内容
	nums5 := make([]int, len(nums4), cap(nums4)*2)
	copy(nums5, nums4)
	printSlice(nums5)
}

2、输出

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