Initial commit

io/cliargs.go

@@ -0,0 +1,28 @@
+package io
+
+import (
+	"errors"
+	"math/big"
+	"os"
+)
+
+type Cliargs struct {
+	value *big.Int
+}
+
+func (arg *Cliargs) Parse() error {
+	args := os.Args[1:]
+	if len(args) != 1 {
+		return errors.New("only expected 1 arg")
+	}
+	num, success := new(big.Int).SetString(args[0], 10)
+	if !success {
+		return errors.New("argument is not an integer")
+	}
+	arg.value = num
+	return nil
+}
+
+func (arg *Cliargs) GetNumber() *big.Int {
+	return arg.value
+}