Programmer Think

Today's learning effect is unsatisfactory. I interrupt from time to time and only learn a little content. I use the structure to make the address book and optimize the address book with the knowledge of dynamic memory allocation. It seems that one mind and two uses are also a skill worth mastering. 1. Why is there dynamic memory allocation ...

Introduction and example of timer based on cumbmx This paper will introduce the basic functions and application methods of timer, and take ultrasonic sensor as an example to show its application Required materials: stm32 single chip microcomputer, stm32cumbmx software, HC_SR04，CH340 The use of serial communication USART is not discussed her ...

preface The one-dimensional prefix sum is introduced earlier. The two-dimensional prefix sum is the online upgrade of the one-dimensional prefix sum. The one-dimensional prefix sum is reflected in the array, while the two-bit prefix sum is reflected in the matrix. 1, What are two-dimensional prefixes and? Based on the one-dimensional prefi ...

Network data is transmitted in the form of stream (we must have a specific format when constructing the data to be sent by the client / server). The integrity and reliable reception of a packet (reliable transmission of tcp and the problem of half packet sticking of data) are not concerned here. You can refer to the above. The purpose here is ...

Dynamic memory management Significance of dynamic memory allocation Introduction to dynamic memory function mallocfreecallocrealloc Common dynamic memory errors Several classic written test questions Flexible array Significance of dynamic memory allocation We have pointed out the way of memory development: //Open up four bytes of ...

Analysis of algorithm design principle Quick sort is an improvement on bubble sort. The basic idea of quick sort is to divide the data to be sorted into two independent parts through one-time sorting, in which all the data in one part is smaller than all the data in the other part, and then quickly sort the two fractional data respectively acc ...

choice question eg1 What is the output of the following code () char a=101; int sum=200; a+=27;sum+=a; printf("%d\n",sum); A: 327 B: 99 C: 328 D: 72 Answer analysis: Correct answer: D char is a signed type, accounting for 1 byte, that is, 8 bits, of which the highest bit is the sign bit, and the value range is - 128 ~ 127; ...

File operation The data generated when the program runs belongs to temporary data. Once the program runs, it will be releasedData can be persisted through filesFile operations in C + + need to include header files < fstream > There are two types of files: Text file - the file is stored in the computer as ASCII code of textBinary files ...

Part1: Pointer Array Usage Low-level Write Output Normal Earlier, pointer arrays were mentioned as arrays, which hold pointers. Why does this happen? When we want to give many addresses to a pointer variable, we need a write, which is too cumbersome. The pointer array solves this problem. Take a look at the use of pointer arrays: and definin ...

preface: For beginners, there are two major difficulties in C language, one is the pointer class with complex changes, and the other is the related data storage memory distribution. This article focuses on the data storage related to C language summary: In C language, there are many types of data. Since it is the storage of data, we can't av ...