golang-exercises/golangr/range/main.go

package main

import (
	"fmt"
	"git.bulgariu.xyz/raul/min-max-array"
	"os"
	//"log"
)

// https://golangr.com/range

var notas []float64
var choice int8
var numToAdd float64
var notaSumada float64

func clear() {
	fmt.Print("\033[H\033[2J")
}

func main() {
	start()
}

func start() {
	clear()
	msg()
	choices()
}

func msg() {
	println("[1] Add grade to vector")
	println("[2] View grades")
	println("[3] Get grade average")
	println("[4] Get min / max grade")
	println("[5] Reset grades")
	println("[6] Exit")
}

func choices() {
	for {
		fmt.Printf("Choice: ")
		_, err := fmt.Scan(&choice)
		if err != nil {
			fmt.Println(err)
		}
		switch choice {
		case 1:
			addVec()
		case 2:
			viewGrades()
		case 3:
			average()
		case 4:
			getMinMax()
		case 5:
			resetGrades()
		case 6:
			fmt.Println("Have a nice day!")
			os.Exit(0)
		default:
			clear()
			msg()
			fmt.Printf("\n-----------------------------------------------\n")
			fmt.Printf("ERROR: Invalid input\n")
			fmt.Printf("-----------------------------------------------\n\n")
		}
	}
}

func average() {
	clear()
	msg()

	for _, elem := range notas {
		notaSumada = notaSumada + elem
	}

	notaMedia := notaSumada / float64(len(notas))
	fmt.Printf("\n-----------------------------------------------")
	fmt.Printf("\nAll your grades combine to %.2v\n", notaSumada)
	fmt.Printf("Your average grade is %.2v\n", notaMedia)
	fmt.Printf("-----------------------------------------------\n\n")

	notaSumada = 0
	notaMedia = 0
}

func getMinMax() {
	clear()
	msg()
	// Me finally getting to make use of my first library :)
	minNota := minmax.Min(notas)
	maxNota := minmax.Max(notas)
	// minNota := Min(notas)
	// maxNota := Max(notas)
	fmt.Printf("\n-----------------------------------------------")
	fmt.Printf("\nLargest grade: %v\n", maxNota)
	fmt.Printf("Smallest grade: %v\n", minNota)
	fmt.Printf("-----------------------------------------------\n\n")
}

func resetGrades() {
	clear()
	msg()
	fmt.Printf("\n-----------------------------------------------")
	fmt.Printf("\nYour grades have been reset!\n")
	fmt.Printf("-----------------------------------------------\n\n")
	notas = nil
}

func addVec() {
	clear()
	fmt.Println("Add a number to your vector")
	fmt.Printf("Number: ")
	_, err := fmt.Scanln(&numToAdd)
	if err != nil {
		fmt.Println(err)
	}

	notas = append(notas, numToAdd)
	clear()
	msg()
	fmt.Printf("\n-----------------------------------------------")
	fmt.Printf("\nYou have added the number %v\n", numToAdd)
	fmt.Printf("-----------------------------------------------\n\n")

	numToAdd = 0
}

func viewGrades() {
	clear()
	msg()
	fmt.Printf("\n-----------------------------------------------\n")
	fmt.Printf("These are your grades:")
	fmt.Printf("\n-----------------------------------------------\n")
	for _, elem := range notas {
		fmt.Println(elem)
	}
	fmt.Printf("-----------------------------------------------\n\n")
}