1.45-1 不等于 0.45 ，具体看图，该怎么办？
推荐学习书目
› Learn Python the Hard Way
Python Sites
› PyPI - Python Package Index
› http://diveintopython.org/toc/index.html
› Pocoo
值得关注的项目
› PyPy
› Celery
› Jinja2
› Read the Docs
› gevent
› pyenv
› virtualenv
› Stackless Python
› Beautiful Soup
› 结巴中文分词
› Green Unicorn
› Sentry
› Shovel
› Pyflakes
› pytest
Python 编程
› pep8 Checker
Styles
› PEP 8
› Google Python Style Guide
› Code Style from The Hitchhiker's Guide
This topic created in 4089 days ago, the information mentioned may be changed or developed.
 |
1
|
1 |
2
然而这并不奇怪，机器存储浮点数本来就是个近似值，而非精确值
|
 |
3
遇到这种情况，使用
>>> from decimal import Decimal >>> Decimal ('1.45') - 1 Decimal ('0.45') >>> (Decimal ('1.45') - 1 ) * 2 Decimal ('0.90') |
Select Language