scp2: task 1.2 + 1.3

scala_project_2025/bank_system/src/main/scala/Account.scala

@@ -1,10 +1,13 @@
 class Account(val code: String, val balance: Double) {
+  def withdraw(amount: Double): Either[String, Account] =
+    if (amount < 0)
+      Left("cannot withdraw negative amounts")
+    else if (amount > balance)
+      Left("cannot withdraw more than you have")
+    else Right(new Account(code, balance - amount))
 
-  // TODO
-  // Implement functions. Account should be immutable.
-  // Change return type to the appropriate one
-  def withdraw(amount: Double): Unit = ???
-
-  def deposit(amount: Double): Unit = ???
-
+  def deposit(amount: Double): Either[String, Account] =
+    if (amount < 0)
+      Left("cannot deposit negative amounts")
+    else Right(new Account(code, balance + amount))
 }