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main.go
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main.go
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package main
import (
"encoding/csv"
"flag"
"fmt"
"math/rand"
"os"
"strings"
"time"
)
type problem struct {
q string
a string
}
func main() {
csvFilename := flag.String("csv", "problems.csv",
"a csv file in the format of 'question,answer'")
timeLimit := flag.Int("limit", 30, "the time limit for the quiz in seconds")
quizOrder := flag.Bool("shuffle", false, "the order of the quiz questions")
flag.Parse()
lines := quizReader(csvFilename)
problems := parseLines(lines)
quizShuffler(quizOrder, problems)
startQuiz(problems, timeLimit)
}
func quizReader(csvFilename *string) [][]string {
file, err := os.Open(*csvFilename)
if err != nil {
exit(fmt.Sprintf("Failed to open the CSV file: %s", *csvFilename))
}
r := csv.NewReader(file)
lines, err := r.ReadAll()
if err != nil {
exit("Failed to parse the provided CSV file.")
}
return lines
}
func startQuiz(problems []problem, timeLimit *int) {
timer := time.NewTimer(time.Duration(*timeLimit) * time.Second)
correct := 0
for i, p := range problems {
fmt.Printf("Problem #%d: %s = ", i+1, p.q)
answerCh := make(chan string)
go func() {
var answer string
fmt.Scanf("%s\n", &answer)
answerCh <- strings.TrimSpace(answer)
}()
select {
case <-timer.C:
fmt.Printf("\nYou scored %d out of %d.\n", correct, len(problems))
return
case answer := <-answerCh:
if answer == p.a {
correct++
}
}
}
}
func parseLines(lines [][]string) []problem {
ret := make([]problem, len(lines))
for i, line := range lines {
ret[i] = problem{
q: line[0],
a: strings.TrimSpace(line[1]),
}
}
return ret
}
func quizShuffler(shuffle *bool, problems []problem) {
if *shuffle {
rand.Seed(time.Now().UnixNano())
rand.Shuffle(len(problems), func(i, j int) {
problems[i], problems[j] = problems[j], problems[i]
})
}
}
func exit(msg string) {
fmt.Println(msg)
os.Exit(1)
}