我正在编写一个从数字中提取小数的函数.忽略异常及其语法,我正在研究2.5.2(默认的Leopard版本).我的功能尚未处理0.我的问题是,该函数产生具有某些数字的随机错误,我不明白其中的原因.我将在代码后发布错误读数.
功能:
def extractDecimals(num):
try:
if(num > int(num)):
decimals = num - int(num)
while(decimals > int(decimals)):
print 'decimal: ' + str(decimals)
print 'int: ' + str(int(decimals))
decimals *= 10
decimals = int(decimals)
return decimals
else:
raise DecimalError(num)
except DecimalError, e:
e.printErrorMessage()
例外类:
class DecimalError(Exception):
def __init__(self, value):
self.value = value
def printErrorMessage(self):
print 'The number, ' + str(self.value) + ', is not a decimal.'
输入数字1.988时输出错误:
decimal: 0.988
int: 0
decimal: 9.88
int: 9
decimal: 98.8
int: 98
decimal: 988.0
int: 987
decimal: 9880.0
int: 9879
decimal: 98800.0
int: 98799
decimal: 988000.0
int: 987999
decimal: 9880000.0
int: 9879999
decimal: 98800000.0
int: 98799999
decimal: 988000000.0
int: 987999999
decimal: 9880000000.0
int: 9879999999
decimal: 98800000000.0
int: 98799999999
decimal: 988000000000.0
int: 987999999999
decimal: 9.88e+12
int: 9879999999999
decimal: 9.88e+13
int: 98799999999999
decimal: 9.88e+14
int: 987999999999999
9879999999999998
我不知道为什么会出现这个错误.希望你们能帮助我.