74 lines
1.2 KiB
Go
74 lines
1.2 KiB
Go
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package main
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import (
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"fmt"
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"math/rand"
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"os"
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"strconv"
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"strings"
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"time"
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)
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var r *rand.Rand
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func main() {
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parm := "1d20"
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if len(os.Args) > 0 {
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if len(os.Args) == 2 {
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parm = os.Args[1]
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} else if len(os.Args) == 3 {
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parm = os.Args[1] + "d" + os.Args[2]
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}
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}
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r = rand.New(rand.NewSource(time.Now().UnixNano()))
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num, sides, times := parseParm(parm)
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for i := times; i > 0; i-- {
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if times > 1 {
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fmt.Printf("%d: ", times-i+1)
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}
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fmt.Println(roll(num, sides))
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}
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}
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func parseParm(p string) (int, int, int) {
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var pts []string
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if strings.Contains(p, "d") {
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pts = strings.Split(p, "d")
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}
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var num, sides int
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if len(pts) > 0 {
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num = atoi(pts[0])
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}
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times := 1
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if len(pts) > 1 {
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if strings.Contains(pts[1], "x") {
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thesepts := strings.Split(pts[1], "x")
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if len(thesepts) > 1 {
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sides = atoi(thesepts[0])
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times = atoi(thesepts[1])
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}
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} else {
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sides = atoi(pts[1])
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}
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}
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return num, sides, times
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}
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func roll(num, sides int) int {
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ret := 0
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for ; num > 0; num-- {
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ret += r.Intn(sides)
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}
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return ret
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}
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func atoi(a string) int {
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ret, err := strconv.Atoi(a)
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if err != nil {
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fmt.Println("Error parsing value:", a)
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os.Exit(1)
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}
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return ret
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}
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