go语言编写一个学生申请借书的借书平台

好的，以下是一个简单的学生申请借书的借书平台的Go语言代码示例：

package main

import (
	"fmt"
	"time"
)

type Book struct {
	Title    string
	Author   string
	Quantity int
}

type Student struct {
	Name      string
	StudentID string
	Borrowed  []string
}

var books = []Book{
	{"The Great Gatsby", "F. Scott Fitzgerald", 3},
	{"To Kill a Mockingbird", "Harper Lee", 2},
	{"1984", "George Orwell", 5},
	{"Animal Farm", "George Orwell", 1},
}

var students = make(map[string]Student)

func main() {
	for {
		fmt.Println("Welcome to the Book Borrowing System!")
		fmt.Println("1. View available books")
		fmt.Println("2. Borrow a book")
		fmt.Println("3. Return a book")
		fmt.Println("4. View borrowed books")
		fmt.Println("5. Exit")

		var choice int
		fmt.Scanln(&choice)

		switch choice {
		case 1:
			viewBooks()
		case 2:
			borrowBook()
		case 3:
			returnBook()
		case 4:
			viewBorrowedBooks()
		case 5:
			fmt.Println("Goodbye!")
			return
		default:
			fmt.Println("Invalid choice, please try again.")
		}

		fmt.Println()
	}
}

func viewBooks() {
	fmt.Println("Available Books:")
	for i, book := range books {
		fmt.Printf("%d. %s by %s (%d available)\n", i+1, book.Title, book.Author, book.Quantity)
	}
}

func borrowBook() {
	var studentID string
	fmt.Println("Please enter your student ID:")
	fmt.Scanln(&studentID)

	if _, ok := students[studentID]; !ok {
		var studentName string
		fmt.Println("Please enter your name:")
		fmt.Scanln(&studentName)

		students[studentID] = Student{Name: studentName, StudentID: studentID}
	}

	var bookIndex int
	fmt.Println("Please enter the number of the book you wish to borrow:")
	fmt.Scanln(&bookIndex)

	if bookIndex < 1 || bookIndex > len(books) {
		fmt.Println("Invalid book number, please try again.")
		return
	}

	book := &books[bookIndex-1]

	if book.Quantity == 0 {
		fmt.Println("Sorry, that book is not available for borrowing.")
		return
	}

	book.Quantity--
	students[studentID].Borrowed = append(students[studentID].Borrowed, book.Title)

	fmt.Printf("Book '%s' borrowed successfully by %s.\n", book.Title, students[studentID].Name)
}

func returnBook() {
	var studentID string
	fmt.Println("Please enter your student ID:")
	fmt.Scanln(&studentID)

	student, ok := students[studentID]
	if !ok {
		fmt.Println("Invalid student ID, please try again.")
		return
	}

	if len(student.Borrowed) == 0 {
		fmt.Println("You haven't borrowed any books.")
		return
	}

	var bookIndex int
	fmt.Println("Please enter the number of the book you wish to return:")
	fmt.Scanln(&bookIndex)

	if bookIndex < 1 || bookIndex > len(student.Borrowed) {
		fmt.Println("Invalid book number, please try again.")
		return
	}

	bookTitle := student.Borrowed[bookIndex-1]

	for i, book := range books {
		if book.Title == bookTitle {
			book.Quantity++
			break
		}
	}

	students[studentID].Borrowed = append(student.Borrowed[:bookIndex-1], student.Borrowed[bookIndex:]...)

	fmt.Printf("Book '%s' returned successfully by %s.\n", bookTitle, student.Name)
}

func viewBorrowedBooks() {
	var studentID string
	fmt.Println("Please enter your student ID:")
	fmt.Scanln(&studentID)

	student, ok := students[studentID]
	if !ok {
		fmt.Println("Invalid student ID, please try again.")
		return
	}

	if len(student.Borrowed) == 0 {
		fmt.Println("You haven't borrowed any books.")
		return
	}

	fmt.Printf("Borrowed Books by %s:\n", student.Name)
	for i, bookTitle := range student.Borrowed {
		fmt.Printf("%d. %s\n", i+1, bookTitle)
	}
}

这个示例中，我们定义了两个结构体：`Book` 和 `Student`。我们用 `Book` 结构体来表示图书，其中包含书名、作者和数量等属性。我们用 `Student` 结构体来表示学生，其中包含姓名、学号和已借阅的书籍列表。

我们还定义了两个变量：`books` 和 `students`。`books` 是一个 `Book` 类型的切片，表示所有可借阅的图书。`students` 是一个 `map[string]Student` 类型的映射，表示所有学生，其中键是学号，值是 `Student` 类型的结构体。

在 `main()` 函数中，我们实现了一个简单的命令行菜单，用于浏览可借阅的图书、借阅图书、归还图书和查看已借阅的图书。在上述函数中，我们利用 Go 语言的标准输入/输出库来实现用户输入和输出的交互。我们还使用 Go 语言的切片和映射来管理图书和学生的信息。

希望这个简单的示例可以帮助你了解如何使用 Go 语言开发一个学生申请借书的借书平台。