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Revision 191 as of 2012-05-16 13:26:52

'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"]