Filling in the gaps—floating-point numbers

浮点常量也可以表示成科学或指数计数法。例如，下面的2句变量声明会初始化为相同的值：

float a = 0.0001;

float b = 1e-4;

The e can be thought of as representing “times 10 to the power of.”

On the iPhone,as with most modern platforms,floating-point values are stored in a format called the IEEE 754 standard.

With only a restricted set of values you can use for the mantissa , you can’t represent every value in the

extended range enabled by the exponent.This leads to the interesting discovery that certain decimal values

can't be stored precisely.举个例子，下面代码片段的输出，可能会让你感到惊讶：

float f = 0.6f;

NSLog(@"0.6 = %0.10f", f);

The %0.10f bit in the call to NSLog requests that the value be printed to 10 decimal places,

but instead of the value 0.6000000000,the value 0.6000000238 gets printed

Filling in the gaps—floating-point numbers相关推荐

Trie（前缀树/字典树）及其应用
from:https://www.cnblogs.com/justinh/p/7716421.html Trie,又经常叫前缀树,字典树等等.它有很多变种,如后缀树,Radix Tree/Trie,P ...
Trie树（字典树）详细知识点及其应用
Trie,又经常叫前缀树,字典树等等.它有很多变种,如后缀树,Radix Tree/Trie,PATRICIA tree,以及bitwise版本的crit-bit tree.当然很多名字的意义其实有交 ...
NIPS 2018 接收论文list 完整清单
NIPS2018 接收论文包括poster.tutorial.workshop等,目前官网公布了论文清单: https://nips.cc/Conferences/2018/Schedule Post ...
[译]Vulkan教程(08)逻辑设备和队列
[译]Vulkan教程(08)逻辑设备和队列 Introduction 入门 After selecting a physical device to use we need to set up a ...
2021年度训练联盟热身训练赛第二场（ICPC North Central NA Contest 2019，南阳师范学院），签到题ABCDEFGIJ
A. Binarize It,简单枚举链接:https://ac.nowcoder.com/acm/contest/12794/A 来源:牛客网题目描述 Professor Boolando ca ...
uthash官方使用说明文档
uthash User Guide Troy D. Hanson, Arthur O'Dwyer version 2.1.0, December 2018 Table of Contents A ha ...
【NIPS 2018】完整论文下载链接-续
NeurIPS2018的论文已经开放下载,本文总结了论文的pdf页面.直接点击对应论文即可访问对应的pdf下载页面. 如果希望Batch->所有论文链接续->第一篇 [556] Mult ...
A comparison of C# vs. java
转发上:http://www.25hoursaday.com/CsharpVsJava.html#friends A COMPARISON OF MICROSOFT'S C# PROGRAMMING ...
2021年度训练联盟热身训练赛第二场（全）
传送门怎么说呢,这次的训练赛的题目难度不是很大,但就是字多 A Binarize It Professor Boolando can only think in binary, or more sp ...

Filling in the gaps—floating-point numbers

Filling in the gaps—floating-point numbers相关推荐

最新文章

热门文章