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HTTP 400

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meOrz

#1 Created at ... [Delete] [Delete and Lock User] 
#!/usr/bin/python
# -*- coding: utf-8 -*-
import math
def quadratic(a,b,c):
#    if not (isinstance(a,(int,float)) and isinstance(b,(int,float)) and isinstance(c,int,float))):
#       raise TypeError('Pleae type right int or float')
if a == 0:
    return ('相同，非二元一次方程式')
else:
    r = b*b - 4*a*c
    if r < 0:
        return ('复数')
    else:
        x1 = (-b + math.sqrt(r))/(2*a)
        x2 = (-b - math.sqrt(r))/(2*a)
        return x1,x2
a = float(input('请输入系数a:'))
b = float(input('请输入系数b:'))
c = float(input('请输入系数c:'))
print('%dx^2+%dx+%d=0的解为%s'%(a,b,c,quadratic(a,b,c)))

因为input()输出为str字符串，所以isinstance判断输入的数据没有必要了。

我是贝爷

#2 Created at ... [Delete] [Delete and Lock User]

你好，我想问一下最后怎么才能改成浮点数输出?比如说%.2f，但是如果直接把%s改成%.2f无法输出...

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