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浮点数在内存中的表示 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术

...能会经常遇到考察浮点数与零比较的问题,是简单的 f == 0 吗?当然不是,正确的写法应该是f > -1e-7 && f < 1e-7,为什么呢? 浮点型,由于精度关系(float精度:2^23 = 8388608,一共7位,同理double 16位),最小分辨0.0000001, 当存储...
https://www.tsingfun.com/it/cp... 

浮点数在内存中的表示 - C/C++ - 清泛网 - 专注C/C++及内核技术

...能会经常遇到考察浮点数与零比较的问题,是简单的 f == 0 吗?当然不是,正确的写法应该是f > -1e-7 && f < 1e-7,为什么呢? 浮点型,由于精度关系(float精度:2^23 = 8388608,一共7位,同理double 16位),最小分辨0.0000001, 当存储...
https://bbs.tsingfun.com/thread-1621-1-1.html 

Arduino控制RGB三色LED灯实验、程序代码、连线图、仿真 - 创客硬件开发 - ...

...控制,针对Arudino UNO板子中带有&quot;~&quot;的3、5、6、9、10、11数字端口写入一个模拟值,通知高电平与低电平持续时间的比值控制LED的亮度变化或者电机的转速。例如:欲使得内置的Arudino UNO 中的led亮度变为原来的一般,编写anal...
https://bbs.tsingfun.com/thread-2268-1-1.html 

位置传感器经纬度为0的问题 - 用户反馈 - 清泛IT社区,为创新赋能!

Pursuer丶: 想问下appinventor位置传感器调试一直是0,0是为什么 清泛: [图片] 清泛: 看看是不是权限问题 Pursuer丶: 是这样的 Pursuer丶: 他刚进来的时候是好的 然后跳到第二个屏幕 再返回第一个 就变0,0了 Pursuer丶: 一开...
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Chrome Developer Tools: How to find out what is overriding a CSS rule?

... answered Dec 13 '12 at 20:03 josh3736josh3736 120k2323 gold badges198198 silver badges245245 bronze badges ...
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GitHub: What is a “wip” branch?

...s browsing GitHub repositories I quite often saw "wip" branches (e.g. 3.1.0-wip ). What does "wip" mean? 3 Answers ...
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Passing a Bundle on startActivity()?

... answered May 4 '09 at 9:23 Jeremy LoganJeremy Logan 44.7k3636 gold badges118118 silver badges143143 bronze badges ...
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Iterating over each line of ls -l output

... | edited Mar 2 '16 at 18:08 answered May 18 '10 at 18:50 R...
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Replacing some characters in a string with another character

... 340 echo "$string" | tr xyz _ would replace each occurrence of x, y, or z with _, giving A__BC___D...
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What does -save-dev mean in npm install grunt --save-dev

... Rob 1,3131010 silver badges2121 bronze badges answered Oct 7 '13 at 11:05 Andreas HultgrenAndreas Hultgren ...