Question

import math

def roots4(outfile,a,b,c):
    """Prints the solutions of 'x' for equation ax² + bx + c = 0 """
    d = b * b - 4 * a * c
    if a == 0 and b == 0 and c == 0:
        print "X = All complex/real numbers."

    if c != 0:
        print "X = No real solutions."

    e = (-c / (b))
    if a == 0 and b > 0 < c:
        print "There's only one solution: " + e

    solutions = [str(-b / (2 * a))]
    if a != 0 and d == 0:
        print "There's only one solution: " + solutions 

    solutions2 = [str((-b + math.sqrt(d)) / 2.0 / a), str((-b - math.sqrt(d)) / 2.0 / a)]
    if a != 0 and d > 0:
        print "There's two solutions: " + solutions2

    xre = str((-b) / (2 * a))
    xim = str((math.sqrt(-d)) / (2 * a))
    solutions3 = [xre + " + " + xim +"i", xre + " - " + xim +"i"]
    if a != 0 and d < 0:
        print "Solutions are: " + solutions3

我得到了一个＆＃34; ZeroDivisionError：浮动除以零＆＃34;错误，因为我在＆＃34; b＆＃34;时除以零。是＆＃34; 0＆＃34;来自输入文件。如何绕过错误以便打印所需的文本？当满足＆＃34; if＆＃34;时，我想要的输出需要是所需的打印语句。条件。

其中（a，b，c）

    0.0, 0.0, 0.0

    0.0, 0.0, 1.0

    0.0, 2.0, 4.0

    1.0, 2.0, 1.0

    1.0, -5.0, 6.0

    1.0, 2.0, 3.0

Answer 1

您为什么要这样做？您能想到一种更好的文本显示方式吗？你根本不除以零怎么样？尝试显示结果而不用除以不除以零的方式除。

Answer 2

我不知道Python。但要了解这个概念。

所以请纠正Python代码错误。

打印ax²+ bx + c = 0

的解

def roots4(outfile,a,b,c):
d = (b * b) - (4 * a * c)    


if a == 0 and b == 0 and c==0:
   print "This is not quadratic equations"
if a == 0 and b == 0:
   print "Invalid equations"
if a == 0:
   e = [str(-b / (2 * a))]
   print "There's only one solution: X=" + e        
if d == 0 :
   solutions = -b / (2 * a)
   print "Two roots are same X = " + solutions
if d > 0:
   solutions2 = [str((-b + math.sqrt(d)) / (2.0 * a)), str((-b - math.sqrt(d)) / (2.0 * a))]
   print "There's two solutions: " + solutions2
if d < 0:
   xre = str((-b) / (2 * a))
   xim = str((math.sqrt(-d)) / (2 * a))
   solutions3 = [xre + " + " + xim +"i", xre + " - " + xim +"i"]
   print "Solutions are: " + solutions3

当用0进行时，我想要它打印给定的文本

2 个答案: