Question

我想创建一个程序来创建由用户输入决定的两个数字的百分比，如果你想找出你已经获得的百分比，可以使用它。一个测试等。这是我在python中使用的代码，但我继续收到错误消息

＆＃34; TypeError：/：＆＃39; str＆＃39;不支持的操作数类型和＆＃39; str＆＃39;＆＃34;

count = input("What is the amount of marks you got in your test?")
total = input("What is the total amount of marks in your test?")
percentage = count/total*100
print(percentage, + "%")

我听说过在python版本3.5.0上无法完成这个百分比，虽然我不知道这是不是真的。

我正在运行Windows 10和python 3.5.0

Answer 1

您需要将输入从string转换为float，因为输入的格式为string ...

在计算中使用它们之前，请执行此操作

count = float(count)
total = float(total)

Answer 2

首先需要将count和total转换为浮点数：

while true:
    count = input("What is the amount of marks you got in your test?")
    total = input("What is the total amount of marks in your test?")

    try: #makes sure for valid input
         count = float(count)
         total = float(count)
         break
    except:
         print("Please input valid number")

然后您可以执行数字操作：

percentage = count/total*100 #valid
print(str(percentage) + "%")#you had a comma when you didnt need it, and you need to convert back to string before concatenating

根据用户输入计算百分比

2 个答案: