// Chapter 21 example: functions of your own that report an error.
// Run with: go run exercises/21/06-your-own-errors.go

package main

import (
	"errors"
	"fmt"
)

func safeDivide(a int, b int) (int, error) {
	if b == 0 {
		return 0, errors.New("cannot divide by zero")
	}
	return a / b, nil
}

func checkLevel(level int) error {
	if level < 1 || level > 99 {
		return fmt.Errorf("level %d is not from 1 to 99", level)
	}
	return nil
}

func main() {
	result, err := safeDivide(17, 5)
	if err != nil {
		fmt.Println("Error:", err)
	} else {
		fmt.Println("Result:", result)
	}

	result, err = safeDivide(17, 0)
	if err != nil {
		fmt.Println("Error:", err)
	} else {
		fmt.Println("Result:", result)
	}

	fmt.Println(checkLevel(12))
	fmt.Println(checkLevel(150))
}