小费计算器出现TypeError：字符串与浮点数无法执行除法运算

你把计算后的带小费总账单转换成了字符串：

billWithTip = str(tip / 100 * bill + bill)

之后将这个字符串赋值给totalBill，后续尝试用它除以people（浮点数类型），Python不支持字符串与浮点数执行除法运算，因此触发TypeError。

print("Welcome to the tip calculator!")
bill = float(input("What was the total bill? £"))
tip = int(input("how much tip would you like to leave? 10, 12, or 15?"))

# 保留数值类型，不提前转字符串
billWithTip = tip / 100 * bill + bill
# 打印时再转为字符串拼接
print("the final price is £" + str(billWithTip))
totalBill = billWithTip
# 人数用int转换更合理，因为人数是整数
people = int(input("how many people should split the bill?"))
totalBill2 = totalBill / people 
print(totalBill2)

• 对最终人均金额做格式化，保留两位小数，更贴合金额显示逻辑：

print(f"Each person needs to pay: £{totalBill2:.2f}")

内容的提问来源于stack exchange，提问作者R0ckTillWeDr0p