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catalogue Using C + + to realize an address book management system. 1, Menu function         1. Define menu functions 2. Realize the Exit menu function 2, Add contact 1. Design contact structure and address book structure 2. Add contact API 3, Show contacts 4, Delete contact 1. Verify that the contact exists 2. Delete practitio ...

FREERTOS learning notes III - message queue 1. Experimental contents Experiment 2: create two dynamic tasks. Task 1 controls the flashing of LED, and task 2 is used to detect keys. When the key KEY0 is pressed, task 1 is suspended; When key 1 is pressed, task 1 is cancelled and suspended. In Experiment 3, a message queue and two task process ...

The representation of structure in memory structural morphology 1. We talked about struct before. We all know that struct can store many different data types 2. This will inevitably lead to a problem 3. Our structure needs memory alignment 4. If it is not aligned, the memory arrangement will be very disordered (unless there are some special r ...

catalogue 🍈🍈Foreword 🍈🍈A brief introduction to qsort 🍈🍈Using qsort to realize a sort of integer type 🍈🍈Sorting of structures with qsort function 🍈🍈Implementation of qsort function   📢 preface Share a library function today This paper introduces the use and implementation of qsort It can realize sorting that is not limi ...

Pointer array char *arr4[]= {"hello","world"}; //Eindimensionales Array aus Zeigern amount to: const char *anonymous1="hello"; const char *anonymous2="World"; char *arr5[2] = {anonymous1,anonymous2}; printf("%c %s",arr5[1][4],arr5[0]); Array pointer Define int (*p)[n]; () high priority. First, it means that P is a pointer to an inte ...

Some error points about pointers: The address of the first element is passed, not the whole array.   About pointer printing: You can use an array or a pointer to print. The pointer will look for the last '\ 0' as the end.   The first dereference print is c. the following print is abcdef It cannot be modif ...

1, From C to C++ 1. Quote Before talking about quotation, first talk about the familiar C language, and then transfer from C to C + +. This can not only consolidate C knowledge, but also easily understand C + +. Example 1. Numerical exchange Exchange the values of a and b There are many ways to realize exchange in C language: Another ...

Pointer one I The concept of pointer 1. In order to facilitate access to the contents of memory, give each memory unit a number, which we call the address, that is, the pointer The address is the pointer 2. The pointer is also a data type, so the pointer has its own memory and stores the address (number) Four elements int a=10 int* p=& ...

Node.js is not suitable for processing time-consuming operations, which has always been a problem. Therefore, node JS provides three solutions. 1 subprocess 2 sub thread 3 Libuv thread pool The first two are more efficient because we only need to write js. But there are also some disadvantages 1. Cost of executing js 2. Although Libuv threa ...

Catalogue preface Quick sort Basic use Parameter interpretation Simulation Implementation preface First of all, I wish you a happy New Year 🎉 🎉 🎉! hello ✨， Hello, everyone. This is the original 💖 💛💙， With more and more articles, there may be many partners who can't find the articles they want to read, so I came out. ...