Initial commit

10-constants/03-refactor-feet-to-meters/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+// EXERCISE
+//
+// This program uses magic numbers
+// Refactor it and use named constants instead
+
+func main() {
+	arg := os.Args[1]
+
+	feet, _ := strconv.ParseFloat(arg, 64)
+
+	meters := feet * 0.3048
+	yards := feet * 0.3333
+
+	fmt.Printf("%g feet is %g meters.\n", feet, meters)
+	fmt.Printf("%g feet is %g yards.\n", feet, yards)
+}