Tag：Floating point number
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Time：2021-6-22
[exercise 1] output “Hello, world!” Title:Output “Hello, world!” 1. AnalysisUse printf() to output “Hello, world!”. 2. Procedure: #include int main() { printf(“Hello, World!”); // Double quotation marks are required before and after strings in printf() return 0; } 3. Input and output: Hello, World! 4. Expand knowledge:Printf() is a function defined in the header file […]
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Time：2021-6-17
A number is a writing symbol used to represent a numberChinese digital writing 37, 37Roman numeral writing XXXVIIArabic numeral binary writing 100101 First address of the article Author: VladSource Vlad (official account: fulade_ me) number In programming, numbers are often used to record game scores, represent visual data, and store web application information. Python handles […]
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Time：2021-6-14
Author:zzssdd2 E-mail：[email protected] 1、 Preface In the process of embedded development, we often print out some debugging information to debug parameters and find problems. Usually, I use the chip’s serial port hardware device with serial port assistant software to debug. But the PCB hardware design of this project does not reserve serial port debugging interface, so […]
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Time：2021-6-13
value type Integer type of MySQL type Storage space occupied (unit) The value range without sign There is a consistent range of values definition TINYINT 1 0 ~ 2⁸-1 -2⁷ ~ 2⁷-1 A very small integer SMALLINT 2 0 ~ 2¹⁶-1 -2¹⁶ ~ 2¹⁶-1 Small integer MEDIUMINT 3 0 ~ 2²⁴-1 -2²⁴ ~ 2²⁴-1 Medium […]
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Time：2021-6-11
data type Char character data type Short short integer Int integer Long long integer Long long – longer integers Float single precision floating point Floating point number = decimal Double double floating point 1. Space occupied by each data type #include int main() { printf(“%d\n”,sizeof(char)); // Size of… In bytes […]
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Time：2021-6-10
This shell is used to determine whether the input number is a reasonable floating-point number The implementation code is as follows: #!/bin/sh # validfloat — Tests whether a number is a valid floating-point value. # Note that this script cannot accept scientific (1.304e5) notation. # To test whether an entered value is a valid floating-point […]
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Time：2021-5-12
introduction This article introduces three very common numerical data types in Python, and uses these data types to demonstrate some simple calculations. Contents of articles 0 × 1. How to judge the data type0 × 2. Numerical data type0 × 3. Calculation examples0 × 4. Use the placeholder to print the value 0 × 1. […]
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Time：2021-4-29
JS code function SubmitCk() {var reg = /^([a-zA-Z0-9]+[_|\_|\.]?)*[ a-zA-Z0-9][email protected]([a-zA-Z0-9]+[_|\_|\.]?)*[ a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;if (! Reg. Test ($(“# txtemail”). Val()) { alert (“please input correct email address”) return false}} Regular expression set for verifying numbers Verification number: ^ [0-9]*$ Verify n-digit numbers: ^ {D {n}$ Verify at least n digits: ^ – D {n,}$ Verify the number of M-N […]
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Time：2021-4-21
catalog introduceKHR_mesh_quantizationandEXT_meshopt_compression Use, usage Performance (compression, loading, parsing) Available (scene, range) shortcoming Guess the future direction of improvement summary introduce Gltf compression, estimates all knowDracoBecause of the adaptation of gltfloader to applets, we found that there are many other compression extensions, such asKHR_mesh_quantizationandEXT_meshopt_compression KHR_mesh_quantization Quantification, also known as vectorization, is to express the data represented […]
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Time：2021-4-18
This article is mainly about some questions raised by winter and my thoughts. If there is something wrong, I hope you can point out it. 1Why do some programming specifications require void 0 instead of undefined? this article mainly introduces the attribute descriptor in JavaScript, module in ES6 and arrow function. The value of […]
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Time：2021-4-16
Write on the front Mastering regular expressions skillfully can help programmers write the most elegant code with the fastest speed. Glacier has combed and summarized the regular expressions used in many years of programming work. These regular expressions can help you save a lot of coding time. Often a simple regular expression can omit a […]
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Time：2021-4-12
Recently, there is a demand that the original integer calculation should be changed to decimal calculation, and one decimal place should be reserved.So according to the demand, the data structure is changed from int to floatround()To retain decimal places. The code of the first edition is as follows: a = 0.1000001 b = round(a+0.1,1) c […]
