Add: Math quiz algorithm

Math quiz/main.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"encoding/csv"
+	"flag"
+	"fmt"
+	"os"
+	"time"
+)
+
+func main() {
+	fileName := flag.String("f", "quiz.csv", "path of the file")
+	timer := flag.Int("t", 30, "timer for the quiz")
+	flag.Parse()
+	questionAndAnswer,err := pullQuestion(*fileName)
+	if err != nil{
+		exit(fmt.Sprintf("Something went wrong, try again later: %w, file: %s", err, fileName))
+	}
+	correctAnswer := 0
+	tObj := time.NewTimer(time.Duration(*timer)*time.Second)
+	ansC := make(chan string)
+
+	problemLoop:
+		// var answer string
+		for i,p := range questionAndAnswer{
+			var answer string
+			fmt.Println("Q: "+ p.question)
+
+			go func() {
+				fmt.Scanf("%s", &answer)
+				ansC <- answer
+			}()
+			select{
+			case <-tObj.C:
+				fmt.Println()
+				break problemLoop
+			case iAns := <-ansC:
+				if iAns == p.answer{
+                    correctAnswer++
+				}
+				if i==len(questionAndAnswer)-1{
+					close(ansC)
+				}
+			}
+		}
+
+		fmt.Printf("You scored %d marks out of %d", correctAnswer, len(questionAndAnswer))
+		fmt.Println("\nPress Enter to exit")
+		<-ansC
+}
+
+func pullQuestion(fileName string)([]questionAndAnswer, error){
+
+	if fObj, err := os.Open(fileName); err == nil {
+		csvR := csv.NewReader(fObj)
+		if cLines, err := csvR.ReadAll(); err == nil{
+			return parseQuestion(cLines), nil
+		} else {
+			return nil, fmt.Errorf("Error reading the file %s: %w", fileName, err)
+		}
+	} else {
+		return nil, fmt.Errorf("Error opening file %s", fileName);
+	}
+
+
+}
+
+type questionAndAnswer struct{
+	question string
+	answer string
+}
+
+func parseQuestion(allQuestions [][]string) []questionAndAnswer{
+
+	r := make ([]questionAndAnswer, len(allQuestions))
+	for i := 0; i<len(allQuestions); i++{
+		r[i] = questionAndAnswer{question: allQuestions[i][0], answer: allQuestions[i][1]}
+	}
+	return r
+}
+
+func exit(msg string){
+	fmt.Println(msg)
+	os.Exit(1)
+}
+
+
+// what did I learn -
+// how to read a csv file using encoding/csv

Math quiz/quiz.csv

@@ -0,0 +1,5 @@
+1221+99,1320
+756+36,792
+1+1,2
+9+189,198
+69+96,165