Improve Go version.

expensereport-go/Makefile

@@ -1,3 +1,3 @@
 .PHONY: all
 all:
-	go build ./...
+	~/go/bin/godog

expensereport-go/expensereport.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+type ExpenseType int
+
+const (
+	Dinner ExpenseType = iota + 1
+	Breakfast
+	CarRental
+)
+
+type Expense struct {
+	Type   ExpenseType
+	Amount int
+}
+
+func PrintReport(expenses []Expense) {
+	total := 0
+	mealExpenses := 0
+
+	fmt.Printf("Expenses %s\n", time.Now().Format("2006-01-02"))
+
+	for _, expense := range expenses {
+		if expense.Type == Dinner || expense.Type == Breakfast {
+			mealExpenses += expense.Amount
+		}
+
+		var expenseName string
+		switch expense.Type {
+		case Dinner:
+			expenseName = "Dinner"
+		case Breakfast:
+			expenseName = "Breakfast"
+		case CarRental:
+			expenseName = "Car Rental"
+		}
+
+		var mealOverExpensesMarker string
+		if expense.Type == Dinner && expense.Amount > 5000 || expense.Type == Breakfast && expense.Amount > 1000 {
+			mealOverExpensesMarker = "X"
+		} else {
+			mealOverExpensesMarker = " "
+		}
+
+		fmt.Printf("%s\t%d\t%s\n", expenseName, expense.Amount, mealOverExpensesMarker)
+		total += expense.Amount
+	}
+
+	fmt.Printf("Meal expenses: %d\n", mealExpenses)
+	fmt.Printf("Total expenses: %d\n", total)
+}

expensereport-go/go.mod

@@ -0,0 +1,17 @@
+module expenses
+
+go 1.17
+
+require (
+	github.com/cucumber/godog v0.12.4
+	github.com/cucumber/messages-go/v16 v16.0.1
+)
+
+require (
+	github.com/cucumber/gherkin-go/v19 v19.0.3 // indirect
+	github.com/gofrs/uuid v4.0.0+incompatible // indirect
+	github.com/hashicorp/go-immutable-radix v1.3.0 // indirect
+	github.com/hashicorp/go-memdb v1.3.0 // indirect
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+)