dice-roller/main.go

package main

import (
	"flag"
	"fmt"
	"math/rand"
	"time"
)

func main() {
	var surfaces, throws int
	rand.Seed(time.Now().Unix())

	flag.IntVar(&surfaces, "s", 20, "Specify amount of die surfaces")
	flag.IntVar(&throws, "t", 1, "Specify dice throws")
	flag.Parse()
	Cast(surfaces, throws)
}

func Cast(dieSurfaces, castAmount int) {
	var (
		casts       []int
		cast, total int
	)

	for i := 0; i < castAmount; i++ {
		cast = rand.Intn(dieSurfaces) + 1
		casts = append(casts, cast)
		total += cast
	}

	if castAmount > 1 {
		fmt.Println(casts)
	}

	fmt.Println(total)
}