package main

import (
	"fmt"
	"io"
	"os"
)

func retError() error {
	return fmt.Errorf("error, simulated error")
}

func loadFile() (s string, err error) {
	var (
		f *os.File
		b []byte
	)
	f, err = os.Open("file.txt")
	if err != nil {
		return
	}
	defer func() {
		err = f.Close()
		if err != nil {
			fmt.Println(err)
		}
	}()

	/*
		err = retError()
		if err != nil {
			return
		}
	*/

	b, err = io.ReadAll(f)
	if err != nil {
		return
	}

	s = string(b)

	return
}

func main() {
	s, err := loadFile()
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("File content: %q\n", s)
}