Hapus Semua

Termasuk bagian Dasar-Dasar dalam perjalanan Swift di Coddy. Pelajaran 82 dari 86.

Tantangan

Mudah

Di pelajaran sebelumnya, kamu menerapkan fitur "Show total and average". Sekarang, terapkan fitur "Clear all expenses" untuk opsi "4".

Ubah kodemu untuk menangani opsi "4":

Saat pengguna memasukkan "4", hapus semua elemen dari array expenses
Cetak All expenses cleared! setelah mengosongkan array
Semua opsi lainnya ("1", "2", "3", dan "5") harus tetap berfungsi seperti sebelumnya

Petunjuk: Gunakan method removeAll() untuk menghapus semua elemen dari array.

Perilaku yang diharapkan:

Saat "4" dimasukkan, kosongkan array expenses dan konfirmasikan dengan pesan
Setelah dikosongkan, melihat expenses harus menampilkan No expenses recorded.
Setelah dikosongkan, menampilkan total/rata-rata harus menampilkan No expenses to calculate.

Contoh interaksi:

1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
1
Enter expense amount:
15.0
Expense added!
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
1
Enter expense amount:
25.0
Expense added!
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
2
Your expenses:
- $15.0
- $25.0
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
4
All expenses cleared!
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
2
No expenses recorded.
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
5
Goodbye!

Coba sendiri

// Daily Expense Tracker - Menu Display

var expenses: [Double] = []

while true {
    // TODO: Write your code below to print the menu options
    // Each option should be on its own line with the format: "number. option text"
    print("1. Add expense")
    print("2. View all expenses")
    print("3. Show total and average")
    print("4. Clear all expenses")
    print("5. Exit")
    
    let choice = readLine()
    
    if choice == "1" {
        print("Enter expense amount:")
        if let input = readLine(), let amount = Double(input) {
            expenses.append(amount)
            print("Expense added!")
        }
    } else if choice == "2" {
        if expenses.isEmpty {
            print("No expenses recorded.")
        } else {
            print("Your expenses:")
            for expense in expenses {
                print("- $\(expense)")
            }
        }
    } else if choice == "3" {
        if expenses.isEmpty {
            print("No expenses to calculate.")
        } else {
            let total = expenses.reduce(0, +)
            let average = total / Double(expenses.count)
            print("Total: $\(total)")
            print("Average: $\(average)")
        }
    } else if choice == "4" {
        print("Coming soon...")
    } else if choice == "5" {
        print("Goodbye!")
        break
    } else {
        print("Coming soon...")
    }
}