added print lines to increase user friendliness

main.go

@@ -10,10 +10,12 @@ import (
 
 func main() {
 
+	fmt.Println("Welcome to Checkdigit Calculator")
+
 	directory, err := os.Getwd()
 	Error(err)
 
-	fmt.Printf("What is the name of the file: ")
+	fmt.Printf("What is the name of the file in this directory?: ")
 	reader := bufio.NewReader(os.Stdin)
 	input, err := reader.ReadString('\n')
 	Error(err)
@@ -115,4 +117,6 @@ func main() {
 		_, err := answerFile.WriteString(gtin + "\n")
 		Error(err)
 	}
+
+	fmt.Println("The answer.txt file has been successfully generated with check digits.")
 }