A Lottery Simulator (learning exercise) in Go - pick 10 numbers for winning ticket, pick 10000 tickets each round.

lottery.go

package main

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

func pickone(ticketsize int) []int {
	one := make([]int, ticketsize)
	for i := 0; i < ticketsize; i++ {
		one[i] = rand.Intn(10)
	}
	return one
}

func createtickets(ticketsize int, n int) [][]int {
	tickets := make([][]int, n)
	for i := 0; i < n; i++ {
		tickets[i] = pickone(ticketsize)
	}
	//for ticket := range tickets {
	//	ticket = pickone()
	//}
	return tickets
}

func checkforwinner(winner []int, tickets [][]int) bool {
	for i := 0; i < len(tickets); i++ {
		ticket := tickets[i]
		winningticket := true
		for j := 0; j < len(ticket); j++ {
			if ticket[j] != winner[j] {
				winningticket = false
				if j > (len(ticket) / 2) {
					fmt.Printf("matched %d! ticket: %v drawing: %v\n", j, ticket, winner)
				}
				break
			}
		}
		if winningticket {
			if len(tickets) < 50 {
				fmt.Printf("Ticket #%d is a winner! %v\n", i, tickets)
			}
			return true
		}
	}
	return false
}

func main() {
	rand.Seed(time.Now().UTC().UnixNano())
	ticketsize := 10 //numbers on a ticket
	n := 10000       //number of tickets to pick each round
	p := 1           //price of a ticket
	//w := 5000    //how much a winning ticket is worth
	jackpot := 0 //jackpot
	ticketsales := 0

	starttime := time.Now().UTC().UnixNano()
	for {
		ticketsales = ticketsales + n
		jackpot = jackpot + (p * n)
		winner := pickone(ticketsize)
		tickets := createtickets(ticketsize, n)
		havewinner := checkforwinner(winner, tickets)
		if havewinner {
			fmt.Printf("Winner!!! Winning Numbers were %d\n", winner)
			break
		}
		//uncomment if u want progress
		//fmt.Printf("tickets=%d, jackpot=%d\n", ticketsales, jackpot)
		time.Sleep(1)
	}
	endtime := time.Now().UTC().UnixNano()
	totaltime := (endtime - starttime) / 1000000000
	fmt.Printf("totaltime = %d, ticketsales = %d, jackpot=$%d\n",
		totaltime, ticketsales, jackpot)
}