Limpar Tudo

Parte da seção Fundamentos do Journey de Ruby da Coddy — lição 84 de 88.

Desafio

Fácil

Aprimore seu rastreador de despesas adicionando a funcionalidade "Clear All".

Seu programa deve:

Inicializar um array vazio chamado expenses
Criar um loop do que exibe o menu e lê a entrada do usuário
Quando o usuário inserir "1", solicitar o nome e o valor da despesa, criar um hash com as chaves :name e :amount, adicioná-lo ao array expenses e imprimir Expense added!
Quando o usuário inserir "2", exibir todas as despesas ou uma mensagem se não houver nenhuma
Quando o usuário inserir "3", calcular e exibir o total e a média de todas as despesas, ou uma mensagem se não houver nenhuma
Quando o usuário inserir "4", limpar todas as despesas do array e imprimir uma mensagem de confirmação
Quando o usuário inserir "5", imprimir Goodbye! e sair do loop

O menu deve ser exibido exatamente como antes:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option:

Quando a opção "4" for selecionada, use o método clear no array de despesas e imprima: All expenses cleared!

Por exemplo, se as entradas forem 1, Coffee, 5.0, 4, 2, e depois 5 (adicionar uma despesa, limpar tudo e depois visualizar), a saída deve ser:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: All expenses cleared!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: No expenses recorded yet.

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Goodbye!

Se as entradas forem 1, Lunch, 12.0, 1, Dinner, 25.0, 3, 4, 3, e depois 5 (adicionar duas despesas, verificar o total, limpar, verificar o total novamente), a saída deve ser:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Total: $37.0
Average: $18.5

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: All expenses cleared!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: No expenses to calculate.

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Goodbye!

Experimente você mesmo

expenses = []


loop do
  puts "--- Expense Tracker ---"
  puts "1. Add Expense"
  puts "2. View Expenses"
  puts "3. Total & Average"
  puts "4. Clear All"
  puts "5. Exit"
  print "Choose an option: "
  
  choice = gets.chomp
  
  if choice == "1"
    print "Expense name: "
    name = gets.chomp
    print "Amount: "
    amount = gets.chomp.to_f
    expense = { name: name, amount: amount }
    expenses << expense
    puts "Expense added!"
  elsif choice == "2"
    if expenses.empty?
      puts "No expenses recorded."
    else
      expenses.each do |expense|
        puts "#{expense[:name]}: $#{expense[:amount]}"
      end
    end
  elsif choice == "3"
    if expenses.empty?
      puts "No expenses to calculate."
    else
      total = 0
      expenses.each do |expense|
        total += expense[:amount]
      end
      average = total / expenses.length
      puts "Total: $#{total}"
      puts "Average: $#{average}"
    end
  elsif choice == "5"
    puts "Goodbye!"
    break
  end
  
  puts ""
end