我的程序不会把分数
我的程序不会把分数
提问于 2013-07-06 04:00:37
对于这个作业，我们应该用Python做一个类，在那里我们放3个分数，并且必须找出学生的平均分和成绩。它可以工作，但我有一个错误。当我输入一个整数(例如73)三次时，它会显示字母等级。但是，当我输入一个带有小数点的数字(例如83.7)三次时，它不会显示字母等级，这就是我们需要的数字。有没有办法让它在我输入带有小数的数字时显示分数？为什么它只对整数有效？
class grades:
def __init__(self,name,test1,test2,test3,avg):
self.name = name
self.test1 = test1
self.test2 = test2
self.test3 = test3
self.avg = avg
def getName(self):
return self.name
def getTest1(self):
return self.test1
def getTest2(self):
return self.test2
def getTest3(self):
return self.test3
def getAvg(self):
return self.avg
#main:
name = input("Enter the students name: ")
test1 = float(input("Enter the first score: "))
test2 = float(input("Enter the second score: "))
test3 = float(input("Enter the third score: "))
avg = float(test1 + test2 + test3) /3.0
grades1 = grades(name,test1,test2,test3,avg)
grades1.name
grades1.test1
grades1.test2
grades1.test3
grades1.avg
print("The student's name is:" ,grades1.name)
print(grades1.name +"'s test scores are:")
print("---------------------------:")
print("TEST1: \t\t\t",grades1.test1)
print("TEST2: \t\t\t",grades1.test2)
print("TEST3: \t\t\t",grades1.test3)
print(grades1.name +"'s average is: \t",grades1.avg)
##if avg <= 100.0 and avg >= 90.0:
## print(name +"'s grade is: \t A")
##elif avg <= 89.0 and avg >= 80.0:
## print(name +"'s grade is: \t B")
##elif avg <= 79.0 and avg >= 70.0:
## print(name +"'s grade is: \t C")
##elif avg <= 69.0 and avg >= 60.0:
## print(name +"'s grade is: \t D")
##elif avg <= 59.0 and avg >= 0.0:
## print(name +"'s grade is: \t E")
if avg >= 90.0 and avg <= 100.0:
print(name +"'s grade is: \t A")
elif avg >= 80.0 and avg <= 89.0:
print(name +"'s grade is: \t B")
elif avg >= 70.0 and avg <= 79.0:
print(name +"'s grade is: \t C")
elif avg >= 60.0 and avg <= 69.0:
print(name +"'s grade is: \t D")
elif avg >= 0.0 and avg <= 59.0:
print(name +"'s grade is: \t E")我之所以评论一年级的部分，是因为我尝试了这两种方法，但都没有成功。
这就是我尝试的方法，但小数没有成功。
Enter the students name: k
Enter the first score: 89.9
Enter the second score: 89.9
Enter the third score: 89.9
The student's name is: k
k's test scores are:
---------------------------:
TEST1: 89.9
TEST2: 89.9
TEST3: 89.9
k's average is: 89.90000000000002Stack Overflow用户
发布于 2013-07-06 04:11:23
您的if-elif语句没有涵盖所有可能的值。例如，如果平均值为89.5，则所有块都不会捕获它。解决这个问题的最简单方法是从if-elif语句中删除<=子句，因为它们是不必要的。
if avg >= 90.0:
print(name +"'s grade is: \t A")
elif avg >= 80.0:
print(name +"'s grade is: \t B")
elif avg >= 70.0:
print(name +"'s grade is: \t C")
elif avg >= 60.0:
print(name +"'s grade is: \t D")
else:
print(name +"'s grade is: \t E")页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/17496099
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