Struct pointers in Go - Mini Project: Build & Apply

Struct pointers

📖 Scenario: You are creating a simple program to manage a book's information using Go structs and pointers. This helps you understand how to work with pointers to structs, which is common in Go programming.

🎯 Goal: Build a Go program that creates a struct for a book, uses a pointer to modify the book's title, and then prints the updated title.

📋 What You'll Learn

Create a struct type called Book with a field Title of type string.

Create a variable myBook of type Book with the title "Go Programming".

Create a pointer variable bookPtr that points to myBook.

Use the pointer bookPtr to change the Title field to "Advanced Go Programming".

Print the updated Title of myBook.

💡 Why This Matters

🌍 Real World

Working with pointers to structs is common in Go programs that manage data efficiently, such as in web servers, databases, or games.

💼 Career

Understanding struct pointers is essential for Go developers to write memory-efficient and clear code, which is highly valued in backend and systems programming jobs.

1

Create the Book struct and a variable

Create a struct type called Book with a field Title of type string. Then create a variable called myBook of type Book with the title set to "Go Programming".

Go

type Book struct {
    Title string
}

// Create myBook variable with Title "Go Programming"
// Your code here

Hint

Use type Book struct { Title string } to define the struct. Then create myBook with Book{Title: "Go Programming"}.

2

Create a pointer to the Book variable

Create a pointer variable called bookPtr that points to the variable myBook.

Go

package main

import "fmt"

type Book struct {
    Title string
}

func main() {
    myBook := Book{Title: "Go Programming"}
    // Create a pointer bookPtr to myBook
    // Your code here
}

Hint

Use the & operator to get the address of myBook and assign it to bookPtr.

3

Change the Title using the pointer

Use the pointer variable bookPtr to change the Title field of myBook to "Advanced Go Programming".

Go

package main

import "fmt"

type Book struct {
    Title string
}

func main() {
    myBook := Book{Title: "Go Programming"}
    bookPtr := &myBook
    // Change the Title using bookPtr
    // Your code here
}

Hint

Use bookPtr.Title = "Advanced Go Programming" to update the title through the pointer.

4

Print the updated Title

Print the updated Title field of the variable myBook using fmt.Println.

Go

package main

import "fmt"

type Book struct {
    Title string
}

func main() {
    myBook := Book{Title: "Go Programming"}
    bookPtr := &myBook
    bookPtr.Title = "Advanced Go Programming"
    // Print the updated Title
    // Your code here
}

Hint

Use fmt.Println(myBook.Title) to print the updated title.