package main

import "fmt"

func main() {
	/*
		fmt.Print("My weight on the surface of Mars is ")
		fmt.Print(73 * 0.3783)
		fmt.Print(" kg,and I would be ")
		fmt.Print(20 * 365 / 678)
		fmt.Print(" years old.")
		fmt.Print("\n")

		fmt.Println("My weight on the surface of Mars is", 73*0.3783, "kg,and I would be", 20*365/678, "years old.")
	*/

	/*
		fmt.Printf("%-15v $%4v\n", "SpaceX", 94)
		fmt.Printf("%-15v $%4v\n", "Google Inc", 100)
	*/

	/*
		const lightSpeed = 299792 // km/s
		var distance = 56000000   // km
		fmt.Println(distance/lightSpeed, "s")
		distance = 401000000 // km
		fmt.Println(distance/lightSpeed, "s")

		const hourADay = 24
		var speed = 100800 // km/h
		distance = 96300000
		var day = distance / speed / hourADay
		fmt.Println(day, "d")
		fmt.Println(day/365, "y")
	*/

	/*
		var num = rand.Intn(10) + 1
		fmt.Println(num)
		num = rand.Intn(10) + 1
		fmt.Println(num)

		var distance = rand.Intn(345000001) + 56000000
		fmt.Println(distance)
	*/

	// malacandra.go
	const distance = 56000000 // km
	var takeTime = 28 * 24
	fmt.Println("need speed is", distance/takeTime, "km/h")
}