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'刚入门，你还要留我多长时间？才肯放我晋级行者啊！！！！' '自己编写的一个小小简单python程序'

#ax^2+bx+c=0 解二次方程的根

import math

def getroot(a,b,c):

  • if a==0:
    • if b!=0:
      • r1=r2=-c/b
      else:
      • r1=r2=None print('a,b,c!=0')
    else:
    • d=b**2-4*a*c e1=-b+math.sqrt(abs(d)) e2=-b-math.sqrt(abs(d))

      if d>0:

      • r1=e1/(2*a) r2=e2/(2*a)
      elif d==0:
      • r1=r2=-b/(2*a)
      else:
      • r1=r2=None print('无根')
    return(r1,r2)

a=['a','b','c'] b=[0,0,0] for i in range(3):

  • a[i]=input("please float integer %s="%a[i]) if a[i]:
    • try:
      • j=float(a[i])

      except ValueError as err:

      • print(err) break
    b[i]=j

print('方程的根为:',getroot(b[0],b[1],b[2]))

["PythonLearningPlan"] ["MyNewPage"]

WikiSandBox (last edited 2013-12-17 14:04:40 by lengxuezhixuan)