package main

import(
	"fmt"
)

var num1 float64
var num2 float64
var math string
var calculate int

func get_num(){
	fmt.Println("num1:")
	fmt.Scanln(&num1)
	fmt.Println("num2:")
	fmt.Scanln(&num2)
}

func get_math_options(){
	for {
		fmt.Println("Choose an operator (+ - / *):")
		fmt.Scanln(&math)

		switch math {
		case "+":
			calculate = 1
			return
		case "-":
			calculate = 2
			return
		case "/":
			calculate = 3
			return
		case "*":
			calculate = 4
			return
		default:
			fmt.Println("Invalid input, try again.")
		}
	}
}

func get_numbers(){
	switch calculate{
	case 1:
		fmt.Println(num1 + num2)
		return
	case 2:
		fmt.Println(num1 - num2)
		return
	case 3:
			if num2 == 0 {
		fmt.Println("Cannot divide by zero")
		return
		}
		fmt.Println(num1 / num2)
		return
	case 4:
		fmt.Println(num1 * num2)
		return
	default:
		fmt.Println("the hell happened here?")
	}
}

func main(){
	get_math_options()
	get_num()
	fmt.Println("total")
	get_numbers()
}