Go 언어의 필수 라이브러리 공개: 학습에 필요한 라이브러리는 무엇인가요?

package main

import "fmt"

func main() {
    var name = "Alice"
    var age = 30
    fmt.Printf("Name: %s, Age: %d
", name, age)
}

package main

import (
    "fmt"
    "net/http"
)

func helloWorld(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, "Hello, World!")
}

func main() {
    http.HandleFunc("/", helloWorld)
    http.ListenAndServe(":8080", nil)
}

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    p := Person{Name: "Bob", Age: 25}
    
    // 编码为JSON
    result, _ := json.Marshal(p)
    fmt.Println(string(result))

    // 解码JSON
    var newPerson Person
    json.Unmarshal(result, &newPerson)
    fmt.Printf("Name: %s, Age: %d
", newPerson.Name, newPerson.Age)
}

package main

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

func main() {
    file, _ := os.Open("example.txt")
    defer file.Close()

    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        fmt.Println(scanner.Text())
    }
}