__main__ input nbsp import brush 平方根 abs pan font
python 使用二分法计算平方根
from math import sqrt
def mysqrt(num,small):
assert num>0
assert small>0
low =0.0
high = max(num,1)
loops=1
whileTrueand loops<=100:
a =(high + low)/2
test = a **2
if abs(test-num)<small:
break
elif test > num:
high = a
else:
low = a
loops+=1
return a
if __name__ =='__main__':
num = input("number:")
small=0.0000000001
print mysqrt(num,small),"my sqrt " #对比我写的这个和math库的计算值的差别
print sqrt(num),"math sqrt"
python 使用二分法计算平方根
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