If-Elif-Else Python（折扣方案）

Question

我正在研究該程序，該程序根據客戶購買的數量提供折扣。

方向如下：某些在線商店根據購買的總金額提供折扣：

        If the purchase total is over $50, a 5% discount is applied

        If the purchase total is over $100, a 10% discount is applied

        If the purchase total is over $500,  a 15% discount is applied

應用折扣后，使用if-elif-else鏈計算購買金額。 對於您的演示，請購買499.99美元。

到目前為止，這是我創建的，但是它似乎無法正常運行，我想知道如何才能使我的代碼變得更好，以及是否可以正確使用if-elif-else代碼。 謝謝大家。

if total_cost>=10:    
   if give_shopper_5percent_discount():
     print"You have won a discount"
     total_cost -= discount
   candidate_prime =True

elif total_cost>100:
   if give_shopper_10percent_discount():
     print"You have won a discount"
     total_cost -= discount
   candidate_prime =True


else total_cost>=500:
   if give_shopper_15percent_discount():
     print"You have won a discount"
     total_cost -= discount
   candidate_prime =True

Answer 1

根據您的描述，第一個total_cost限制是錯誤的。 而且您不應該在total_cost >= 500之前使用else

嘗試這個：

total_cost = int(input('Please enter a total_cost:'))
if total_cost>=500:    

   print"You have won a discount by 15 percent"
   total_cost *= 0.85



elif total_cost>100:

   print"You have won a discount by 10 percent"
   total_cost *= 0.9



elif total_cost>=50:

   print"You have won a discount by 5 percent"
   total_cost *= 0.95

else:
   print 'you total cost is not in the range of discount!'
print 'Now the total cost is ', total_cost

Answer 2

您必須先檢查最大的折扣，否則您將按預期給予更多折扣；-)

if total_cost>=500:
  ...
elif total_cost>=100:
  ...
elif total_cost>=10:
  ...
else: 
  pass

Answer 3

您的縮進已經過時了。 在python中很重要。 （嘗試這個？）

if give_shopper_5percent_discount():
    print"You have won a discount"
    total_cost -= discount
    candidate_prime =True

elif total_cost>100:
     if give_shopper_10percent_discount():
     print"You have won a discount"
     total_cost -= discount
      candidate_prime =True

else total_cost>=500:
      if give_shopper_15percent_discount():
      print"You have won a discount"
      total_cost -= discount
      candidate_prime =True

對於折扣，也可以嘗試乘而不是減。