Golang实现按指定字符后回车退出的功能

哈哈，更像是继续糟糕的工作。

感谢 @jayts！我的程序遇到了一些问题。目前，我已修改代码来测试字符 ‘X’，如果不是 ‘X’，则将数字添加到切片中。我还没有尝试使用 append 来动态增加空间（有点像 Java 中的 ArrayList add 方法）。请看一下代码和输出：

// Write a program which prompts the user to enter integers and stores the integers in a sorted slice.
// The program should be written as a loop. Before entering the loop, the program should create an empty
// integer slice of size (length) 3. During each pass through the loop, the program prompts the user to enter an
// integer to be added to the slice. The program adds the integer to the slice, sorts the slice, and prints
// the contents of the slice in sorted order. The slice must grow in size to accommodate any number of integers
// which the user decides to enter. The program should only quit (exiting the loop) when the user enters the
// character ‘X’ instead of an integer.

package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	userSlice := make([]int, 3) //Create a Slice of size 3

	inputReader := bufio.NewReader(os.Stdin)

	for i := 0; i < len(userSlice); i++ {

		fmt.Println("Welcome to Slices, Please enter a number to add to the slice:")

		checkForX, _ := inputReader.ReadByte()

		if checkForX == 'X' {
			fmt.Println("Thanks for using Slices!")
			os.Exit(0)
		} else {

			userSlice[i] = int(checkForX - '0')
			fmt.Println("Slice so far:", userSlice)
		}

	}

}

以下是输出，我甚至没有尝试添加另一个值，但它却自己添加到了切片中。我想知道为什么：

$ go run slices.go
Welcome to Slices, Please enter a number to add tothe slice:9
Slice so far: [9 0 0]
Welcome to Slices, Please enter a number to add tothe slice:
Slice so far: [9 218 0]
Welcome to Slices, Please enter a number to add tothe slice:X
Thanks for using Slices!

编辑：请注意，第二次没有输入任何内容，但切片中的第二个位置却不知为何被填充了。这很奇怪。