Severely expanded functionality

Also, cleaner code!

golangr/range/main.go

@@ -2,31 +2,112 @@ package main
 
 import (
 	"fmt"
+	"os"
+	//"log"
 )
 
 // https://golangr.com/range
 // TODO: Create something similar to the array exercise but cleaner and better
 
 var notas []float64
+var choice int8
+var numToAdd float64
+var notaSumada float64
 
 func main() {
+	start()
+}
+
+func start() {
 	fmt.Print("\033[H\033[2J")
-	fmt.Println("Welcome")
+	msg()
+	choices()
 }
 
 func msg() {
-	fmt.Print("\033[H\033[2J")
+	println("[1] Add grade to vector")
-	println()
+	println("[2] View grades")
+	println("[3] Get grade average")
+	println("[4] Get min and max grade")
+	println("[5] Reset grades")
+	println("[6] Exit")
 }
 
 func choices() {
-	fmt.Print("\033[H\033[2J")
+	for {
+		fmt.Printf("Choice: ")
+		fmt.Scanln(&choice)
+		switch choice {
+		case 1:
+			addVec()
+		case 2:
+			viewGrades()
+		case 3:
+			average()
+		case 4:
+		case 5:
+			resetGrades()
+		case 6:
+			fmt.Println("Have a nice day")
+			os.Exit(0)
+		default:
+			msg()
+			fmt.Println("Another one")
+		}
+	}
+}
+
+func total(num float64) {
+
 }
 
 func average() {
+	fmt.Print("\033[H\033[2J")
+	msg()
+
+	for _, elem := range notas {
+		notaSumada = notaSumada + elem
+	}
+
+	notaMedia := notaSumada / float64(len(notas))
+	fmt.Printf("\nAll your grades combine to %v\n", notaSumada)
+	fmt.Printf("Your average grade is %v\n\n", notaMedia)
+}
+
+func min(num float64) {
 
 }
 
-func minmax() {
+func max(num float64) {
 
 }
+
+func resetGrades() {
+	fmt.Print("\033[H\033[2J")
+	msg()
+	fmt.Printf("\nYour grades have been reset!\n\n")
+	notas = nil
+}
+
+func addVec() {
+	fmt.Print("\033[H\033[2J")
+	fmt.Println("Add a number to your vector")
+	fmt.Printf("Number: ")
+	fmt.Scanln(&numToAdd)
+	notas = append(notas, numToAdd)
+	fmt.Print("\033[H\033[2J")
+	msg()
+	fmt.Printf("\nYou have added the number %v\n\n", numToAdd)
+
+	numToAdd = 0
+}
+
+func viewGrades() {
+	fmt.Print("\033[H\033[2J")
+	msg()
+	fmt.Println("\nThese are your grades:")
+	for _, elem := range notas {
+		fmt.Println(elem)
+	}
+	fmt.Println()
+}