Tag:character

  • I/o flow

    Time:2022-6-6

    I/o flow Reference blog:Java IO stream explanation – time Island – blog Park (cnblogs.com) Concept: a channel for transferring data between memory and storage devices Classification: by unit: Byte stream: all data can be read and written in bytes Character stream: intelligently read and write text data in character units By function: Node stream: it […]

  • C++ : input / output stream

    Time:2022-6-6

    The input and output of data flow from one place to another like a water flow. This process is called “flow”. (1) Input and output strategies for C and c++ The data source of the input stream may be a keyboard or a file. The IO policies in C are as follows: Use scanf (), […]

  • C++ : input / output stream

    Time:2022-6-5

    The input and output of data flow from one place to another like a water flow. This process is called “flow”. (1) Input and output strategies for C and c++ The data source of the input stream may be a keyboard or a file. The IO policies in C are as follows: Use scanf (), […]

  • MySQL varchar length problem

    Time:2022-6-5

    Today, I saw the intern’s table creation statement, in which many fields are varchar (255). I thought it was very strange, so I mentioned it,Intern: “because MySQL has specifications, when the value in varchar is greater than 255, MySQL will add an extra 1-byte user storage length. When it is less than 255, only 1-byte […]

  • XHTML tutorial: text formatting and special characters

    Time:2022-6-3

    This section describes the implementation of text formats and special characters in XHTML.In the previous tutorial, we used the <b> tag once, which makes the content contained in it bold. For example, “<b> rookie bar </b>” will be displayed asA rookie。 We call this label that defines how text is displayed as a text format […]

  • 8. string to integer (leetcode) – C language

    Time:2022-6-2

    Method 1: traditional thinking, directly traverse and compare characters according to the topic rules /* **Converting strings to numbers — question 8 of leetcode ** author: aliao */ #include <stdio.h> #include <limits.h> int myAtoi(char *str) { int i = 0; int start = 0; int len = 0; //Traverse the starting space character in the […]

  • Common cryptography in CTF

    Time:2022-6-1

    preface For reference, our teachers’ word and PPT, combined with their own understanding, combined with the understanding of online articles. I Base64 encoding In Base64 encoding, features and charactersLetters: A-Z A-Z; Number: 0-9; Symbol: +/And then there is often one “=” or two “= =” at the end. Principle: first convert each character of the […]

  • Roman numeral to integer, written by users whose Java execution time exceeds 100%

    Time:2022-6-1

    Execution time: 2 ms, beating 100.00% of users in all Java submissions subject  https://leetcode-cn.com/problems/roman-to-integer   Roman numerals contain the following seven characters: I, V, x, l, C, D, and m. Character value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For example, the Roman numeral 2 is written as […]

  • Edit the markdown file with vscode (you can paste the screenshot)

    Time:2022-6-1

    When pasting screenshots with markdown, there are many steps: 1) Capture pictures; 2) Store the picture in a specific location; 3) Remember the image path and write code in the markdown file; 4) Preview effect; For document editors such as word, you only need to paste the screenshot, which is very convenient. It is hoped […]

  • The enigmatic “steganography” is not exclusive to hacker agents – I use the front-end steganography, which is very interesting ❗

    Time:2022-5-31

    preface Hello, everyone ~ I’m Rongding, Mid Autumn Festival is coming soon ~ first of all, I wish you a Happy Mid Autumn Festival, family reunion, happiness and well-being~ The reason for this issue of copyright protection content is that some time ago, a group of friends said that his article had been stolen, so […]

  • First day of language learning

    Time:2022-5-31

    C language Floating point number Floating point numbers are stored in memory as exponents — numbers, alphanumeric The floating point number 168e2 in exponential form means 168* 102 Float — single precision variable provides 7 significant digits — conservative estimation Double — double precision variable provides 15 significant digits — conservative estimation %F — output […]

  • VIM from entry to mastery

    Time:2022-5-31

    install Download the windows installation package. The latest version is available inhereDownload the Chinese help installation package. The latest version is available inhereInstall the VIM plug-in. The original file is in thehere, download the plug VIM, and then put it in the autoload directory of the VIM installation path Introduction to VIM VIM is a […]