2

我正在使用 Python 做一个问题，比如不断要求用户输入数字。如果不是，程序应该计算这些数字的平均值。似乎我的程序无法从第二个 while 循环中逃脱，并且“except”仍然是错误的。这是我的程序：

count =0
total=0
ask=input ("Do you want to enter a number? (Y/N)")
while ask=="Y":
    numbers=float(input("Enter number"))
    count= count+1
    total=total+numbers
    con_ask=input ("Do you want to continue entering a number? (Y/N)")
    if con_ask=="Y":
        numbers=float(input("Enter number"))
        count=count+1
        total=total+numbers
    elif con_ask=="N":
        print ("The average of", count, "numbers is", total/count)
except :
    print ("Zero Division Occured. Average cannot be calculated")
4

7 回答 7

1

我的计算平均数版本：

count = 0
total = 0
ask = raw_input("Do you want to enter a number? (Y/N)")
try:
    while ask == "Y":
        numbers = float(raw_input("Enter number"))
        count = count + 1
        total = total + numbers
        con_ask = raw_input("Do you want to continue entering a number? (Y/N)")
        if con_ask == "Y":
            continue
        elif con_ask == "N":
            print "The average of", count, "numbers is", total / count
            break
except:
    print "Zero Division Occured. Average cannot be calculated"
于 2012-10-11T00:52:30.897 回答
1

另一种方法：

numbers = []
ask = raw_input("Do you want to enter a number? (Y/N) ")
while ask == "Y":
   numbers.append(float(raw_input("Enter number ")))
   ask = raw_input("Do you want to continue entering a number? (Y/N) ")

if numbers:
    avg = sum(numbers,0.0) / len(numbers)
    print "The average of {0} numbers is {1}".format(len(numbers),avg)
else:
    print "You didn't enter any numbers"
于 2012-10-11T17:52:07.837 回答
0

您似乎在循环 while ask == "Y"，但后来设置了变量con_ask。可以重复使用ask吗？

此外，实现此目的的另一种方法可能是首先使用输入中的所有数字填充一个数组，然后平均值变为：

sum(numbers) / len(numbers)
于 2012-10-11T00:44:43.420 回答
0

这里只有一个while循环。您可以重用ask，以便在每次循环迭代后对其进行测试。

ask=input ("Do you want to continue entering a number? (Y/N)")
于 2012-10-11T00:48:23.793 回答
0

如果你想要一个简单的程序来计算某个数字的平均值，你可以查看Python Cookbook。

于 2012-10-11T16:18:22.930 回答
0 
from sys import argv

t=0
c=0
ans=raw_input("Enetr the choice")

while ans=="Y" or ans=="y":
    a=float(raw_input("Value\t"))
    t=t+a
    c=c+1
    print  "-------------------------------------------"
    print "avarage %f\n" %(t/c)
    ask=raw_input("do you wanna continue \t")
    if ask=="y" or ask=="y":
        continue
    else:
        print "Not wanna more inputs\n"
        break
        print "---------- END ----------------------------"
于 2014-04-23T06:00:54.153 回答
0

如果你知道你需要输入多少数字

我的回答是：

l=[]

a=int(input('How much numbers you need to enter:'))

for x in range(a):

    s=float(input())
    l.append(s)
print(sum(l)/a)

如果您不知道需要输入多少数字

l=[]

a=input('If you want to enter a number then enter a Y if you dont't enter N:')

while a=='Y':
     s=float(input())
     l.append(s)
     a=input('If you want to enter a number then enter a Y if you dont't enter N:')
print(sum(l)/len(l))
于 2019-03-01T11:17:47.680 回答