Question

mark=input("Please enter the mark you received for the test:")
total=input("Please enter the mark the test was out of:")

percentage=(mark*100/total)

print("Your percentage is:"),percentage,"%"

当我在python 3.3.2 mac中运行它时会出现此错误。

Traceback (most recent call last):
  File "/Users/user1/Desktop/Percentage2.py", line 4, in <module>
    percentage=(mark/total*100)
TypeError: unsupported operand type(s) for /: 'str' and 'str'

我该如何解决？

Answer 1

percentage=(float(mark)*100/float(total))

print("Your percentage is: ",percentage,"%", sep='')

Answer 2

输入返回一个字符串，你试图做“30”* 100 /总，字符串不能用数学方法计算，尝试int（mark）和int（total）然后做数学运算。

try:
    Mark = int(input("Please enter the mark you received for the test."))
    Total = int(input("Please enter the mark the test was out of."))
    Perc = (Mark*100) / Total
    print("Your Percentage is"+Perc)
except:
    print("Numbers not entered. Please try again")

Answer 3

当您进行“打印”声明时：

print ("your percentage is: %p" % (percentage))

此外，您可以使用格式：

print("your percentage is: {0} ".format(percentage))

个人建议使用格式。

百分比计算不起作用

3 个答案: