Space Station 13 (SS13) Tele-Science Calculator

package main

import (
    "fmt"
    "strconv"
    "bufio"
    "os"
    "strings"
)

// T = M B + C
// Co-ordinates should be entered in X, Y format
// COMPILE IT FOR YOURSELVES NERDS

func input() string {
    reader := bufio.NewReader(os.Stdin)
    text, err := reader.ReadString('\n')
    if err != nil {
        fmt.Println("\n[!] Reading input failed, exiting...")
        os.Exit(3)
    }
    return text
}

func parseCoords (coords string) [2]float64 {
    splitCoords := strings.Split(coords, ",") // split coords into array
    intCoords := [2]float64{} // create empty int array
    intOne, err := strconv.ParseFloat(strings.TrimSpace(splitCoords[0]), 64) // convert first element of splitCoords to float
    intTwo, err := strconv.ParseFloat(strings.TrimSpace(splitCoords[1]), 64) // same thing but with second element
    if err != nil {
        fmt.Println("[!] Failed to convert one or more co-ordinates to floats, exiting...")
        os.Exit(3)
    }
    intCoords[0] = intOne // add integers to int array
    intCoords[1] = intTwo
    return intCoords // return int array
}

func formatFloat(num float64) string {
    formatted := strconv.FormatFloat(num, 'f', -1, 64)
    return formatted
}

func main() {
    fmt.Println("[*] Welcome to my (not nerdy) tele-science calculator!") // yeah, it is cool (and NOT nerdy)

    fmt.Printf("\n[*] Enter first set of input co-ordinates: ") // this block of code takes the first set of inputs and outputs from the user
    firstInCoords := parseCoords(input())
    fmt.Printf("[*] Enter first set of output co-ordinates: ")
    firstOutCoords := parseCoords(input())

    fmt.Printf("[*] Enter second set of output co-ordinates: ")
    secondOutCoords := parseCoords(input())

    fmt.Printf("\n[*] Caluclating offsets... ")
    xOffset := secondOutCoords[0]-firstOutCoords[0]
    yOffset := secondOutCoords[1]-firstOutCoords[1]
    fmt.Println("[DONE]")
    fmt.Printf("[*] Offsets: X=%s, Y=%s\n", formatFloat(xOffset), formatFloat(yOffset))

    fmt.Printf("\n[*] Caluclating constants... ")
    xConstant := firstOutCoords[0]-(firstInCoords[0]*xOffset)
    yConstant := firstOutCoords[1]-(firstInCoords[1]*yOffset)
    fmt.Println("[DONE]")
    fmt.Printf("[*] Constants: X=%s, Y=%s\n", formatFloat(xConstant), formatFloat(yConstant))
    fmt.Printf("[*] Calculator ready!\n\n")

    for {
        fmt.Printf("[*] Enter co-ordinates to reverse calculate: ")
        coords := parseCoords(input())
        fmt.Printf("[*] Running calculations in reverse... ")
        outputCoords := [2]float64{}
        outputCoords[0] = (coords[0]+(xConstant*(-1)))/xOffset
        outputCoords[1] = (coords[1]+(yConstant*(-1)))/yOffset
        fmt.Println("[DONE]")
        fmt.Printf("[*] Results: X=%s, Y=%s\n\n", formatFloat(outputCoords[0]), formatFloat(outputCoords[1]))
    }
}