Programmer Think

   recently, I was reviewing the data structure. In order to deepen my understanding of B-tree, I sorted out the following notes, and then implemented B-tree in C language; I haven't used C language for a long time. Some parts of the code don't conform to the specification or there are problems in understanding this article. Please co ...

When reading and writing a file as characters, you can read one character from the file or write one character to the file at a time. Two functions are mainly used: fgetc() and fputc(). Character reading function fgetc Fgetc is the abbreviation of file get char, which means to read a character from the specified file. The usage of fge ...

This issue is the 15th section of C + + basic syntax sharing. Today, let's sort out the top five of the top ten sorting algorithms! Bubble sorting Bubble sorting idea: 1. Compare adjacent elements. If the first one is bigger than the second, exchange them. 2. Do the same work for each pair of adjacent elements, from the first pair at the ...

Experiment 2 of Linux operating system: process communication Title: [purpose] Further improve the ability of C programming in Linux environment, understand and be familiar with a variety of IPC mechanisms supported by Linux. As a multi task and multi process operating system, information interaction between processes is inevitable. Inter pr ...

We all know that C language provides us with many built-in library functions, and these library functions need to refer to their respective header files when they are used. This article is about several string related functions in < string. H >. catalogue 1.strlen() - count the number of characters in the string one point one &nbsp ...

Hash lookup (hash) In the search of linear tables and tree tables, there is no definite relationship between the position of records in the table and the keywords of records. Therefore, a series of keyword comparison is required when searching records in these tables. This kind of search method is based on "comparison", and the effic ...

Warning; In modern C + +, we should avoid low-level memory operations as much as possible and use modern structures, such as containers and smart pointers. Use dynamic memory Warning: As a rule of thumb, each time you declare a pointer variable, be sure to initialize it immediately with the appropriate pointer or nullptr! For example, Figu ...

Qs What does the Q1 namespace do? What is the difference between Q2 cout output and printf output? Respective advantages and disadvantages? When cin is entered, it ends with a space by default cout "<<"The operator is overloaded and output according to the data type to be output, printf Is to manually operate the output content format. ...

Dynamic memory management Why is there dynamic memory allocation What kind of memory development method have we mastered so far //Create a variable int val = 20; //Local variables open up 4 bytes in stack space int g_val = 10; //The global variable opens up 4 bytes in the static area //Create an array char arr[10] = {0}; //The local ...

structural morphology 1. Problems of the structure How are points calculated? First, you must master the alignment rules of the structure: \1. The first member is at the address offset from the structure variable by 0. \2. Other member variables shall be aligned to the address of an integer multiple of a number (alignment number). Alignmen ...