Solution to exercise of unit 04-02

exercise_0402/go.mod

+module gitlab.reutlingen-university.de/go-exercises/go-starter/exercise_0402
+
+go 1.20

exercise_0402/main.go

+package main
+
+import (
+	"errors"
+	"fmt"
+)
+
+type BankAccount struct {
+	balance float32
+	limit   float32
+}
+
+func (ba *BankAccount) Withdraw(amount float32) error {
+
+	if amount > ba.balance+ba.limit {
+		return errors.New("amount currently not available")
+	} else {
+		ba.balance -= amount
+		return nil
+	}
+}
+
+func main() {
+	ba := BankAccount{
+		balance: 1000.0,
+		limit:   3000.0,
+	}
+	fmt.Printf("%v\n", ba)
+	if err := ba.Withdraw(5000); err != nil {
+		fmt.Println(err.Error())
+	}
+	fmt.Printf("%v\n", ba)
+	if err := ba.Withdraw(1000); err != nil {
+		fmt.Println(err.Error())
+	}
+	fmt.Printf("%v\n", ba)
+}