updating bank app

bank/bank.go

@@ -1,9 +1,30 @@
 package main
 
 import "fmt"
+import "os"
+import "strconv"
+
+const accountBalanceFile = "balance.txt"
+
+func getBalanceFromFile() float64 {
+	data, err := os.ReadFile(accountBalanceFile, )
+
+	if err != nil {
+
+	}
+	
+	balanceText := string(data)
+	balance, _ :=strconv.ParseFloat(balanceText, 64)
+	return balance
+}
+
+func writeBalanceToFile(balance float64) {
+	balanceText := fmt.Sprint(balance)
+	os.WriteFile(accountBalanceFile, []byte(balanceText), 0644)
+}
 
 func main() {
-	var accountBalance = 1000.0
+	var accountBalance = getBalanceFromFile()
 
 	fmt.Println("Welcome to Go Bank!")
 
@@ -33,6 +54,7 @@ func main() {
 
 			accountBalance += accountBalance
 			fmt.Println("Balance updated! New amount:", accountBalance)
+			writeBalanceToFile(accountBalance)
 		case 3:
 			fmt.Print("Your withdrawal")
 			var withdrawalAmount float64
@@ -50,6 +72,7 @@ func main() {
 
 			accountBalance -= withdrawalAmount
 			fmt.Println("Balance updated! New amount:", accountBalance)
+			writeBalanceToFile(accountBalance)
 		default:
 			fmt.Println("Goodbye!")
 			fmt.Println("Thanks for choosing our bank")