package main

import (
    "bufio"
    "fmt"
    "io"
    "os"
)

var filename string
var content string
var nErr int
var len int

func FileName() string {
    fmt.Print("\nEnter a name for your new file: ")
    fmt.Scan(&filename)
    filename = filename + ".txt"
    return filename
}

func Content() string {
    fmt.Printf("\nPlease type in the content you want to add to file '%s' : ", filename)
    tmp := bufio.NewReader(os.Stdin)
    content, _ = tmp.ReadString('\n')
    //fmt.Scan(&content) ----------- THAT WORKS FINE
    //content = strings.TrimRight(content, "\n")
    return content
}

func main() {
    filename = FileName()
    file, err := os.Create(filename)
    defer file.Close()

    nErr = 1
    checkError(err)

    content := Content()
    len, err = io.WriteString(file, content)
    nErr = 2
    checkError(err)
}

func checkError(err error) {
    if nErr == 1 {
        if err == nil {
            fmt.Printf("\nFile '%s' successfully created!\n", filename)
        } else {
            fmt.Printf("\nCould not create file '%s'.\n", filename)
        }
    } else if nErr == 2 {
        if err == nil {
            fmt.Printf("\nContent successfully written %d characters to file '%s'!\n", len, filename)
        } else {
            fmt.Printf("\nCould not write content to file '%s'.\n", filename)
        }
    } else {
        fmt.Print("\nSomething went wrong.\n")
    }
}