added main, there should be a seperate cmd, will do later

slownie.go

@@ -1,9 +1,11 @@
-package slownie
+package main
 
 import (
 	"errors"
 	"fmt"
 	"math"
+	"os"
+	"strconv"
 	"strings"
 )
 
@@ -144,3 +146,16 @@ func KwotaSlownie(input float64, numbers bool) (output string, err error) {
 	return minusword + someSlownie(zloty, _zlotyWord) + " " + someSlownie(grosze, _groszyWord), nil
 
 }
+
+func main() {
+	arg := os.Args[1]
+	if s, err := strconv.ParseFloat(arg, 32); err == nil {
+		if words, err := KwotaSlownie(s, true); err == nil {
+			fmt.Printf("slownie: %s\n", words)
+		} else {
+			println("error during processing")
+		}
+	} else {
+		println("error reading input")
+	}
+}