C

First, the cosine theorem is proved:Having an edge of a, B, c, the corresponding angle is a_angle, B _angle, c_angleThe following relationship can be found as a diagonal line from the point to the corresponding edge:(1)A = B * cos c_angle + c * cos

Over the past few days, we have been using STM32 to write the sensorless BLDC driver framework. Therefore, we must use the six-way complementary PWM produced by The CCR1/CCR2/CCR3 of TIM1 and use the CCR4 to generate an interrupt, used in the PWM-ON

When I was doing oj today, I defined two macros: # Define max_2 (a, B) a> B? A: B max_3 (a, B, c) (a> B? A: B)> c? (A> B? A: B): c Then the program results are always WA, and the logic of the program is carefully checked over and over again, so I

    # Include void func (void) {printf ("\ n Cleanup function called \ n"); return ;}int main (void) {int I = 0; atexit (func ); for (; I   Int func (void * ptr) Void * memset (void * s, int c, size_t

// Question: enter an integer n greater than 3 to determine whether it is a prime (prime, also called prime)# Include # Include Int main (){Int n, I, k;Printf ("please enter a integer number, n =? ");Scanf ("% d", & n );K = sqrt (n );For (I = 2; I

Bit domain, When I was doing this, I encountered the following question: When default alignment is selected for 32-bit CPUs, the following struct is defined: struct A {unsigned a: 19; unsigned B: 11; unsigned c: 4; unsigned d: 29; char index;}; the

Introduction to header files in C language and introduction to C Language1. # include First, include is a pre-processing instruction in C language. It is used to copy all the content of the subsequent file to the current source file. Generally, the

Data Structure: Stack C language implementation, data structure C LanguageStack is an advanced post-release data structure. This structure is used for common function calls in computers. Its common operations are stack-based and stack-based, for

Jurman algorithm (morn) Details: matrix operation, morn MatrixIntroduction to the Juran algorithm (morn): matrix operations (1) In the past two days, some people have questioned the running speed of the Juran algorithm. I have never tested it, so it

One-dimensional quadratic equation and one-dimensional quadratic equation in C Language When solving a quadratic equation using C language, we first agree that this equation is in the form of AX2 + BX + C = 0. Next we need to consider the parameter

C language for Bubble sorting and Bubble Sorting C language for Bubble Sorting Algorithm Implementation: # Include # Include Int main () {int arr [2] [3]; int I, j, k, temp; int * p = arr; printf ("\ n ======================== array

In C language programming, only two numbers appear in one array, and all other numbers appear twice. In C language programming, only two numbers appear in one array, and all other numbers appear twice. Code Implementation (Environment: Visual

[Programming] C language Linux system programming-waiting for termination of sub-processes (zombie processes), linux stiff 1. subprocesses awaiting termination (zombie processes ): If a child process ends before the parent process, the kernel sets

[Programming] C language struct pointer as function parameter, pointer Function Struct pointer as function parameter:The struct variable name represents the entire set itself, the entire set passed as a function parameter, that is, all members,

The pointer is used to allocate dynamic memory for parameters and the double pointer (top) and double dynamic memory. Dynamic Memory Allocation in C: Format: Int * pointer; Pointer = (int *) malloc (100 * sizeof (int )); The memory can be

[Small project] luggage (unlock and weigh Bluetooth), luggage weighing 1 #include 2 #include "hx711.h" 3 4 sbit Led0=P0^0; //ÓÃÒ»¿ÅСµÆµÄÁÁÃð´ú±íËøµÄ¿ª¹Ø 5 sbit Led1=P1^0; //ÓÃСµÆ±íʾÐÐÀîµÄÖØÁ¿£¬Ã¿Ò»¸öСµÆ´ú±í300g£¬¹²Îå¿ÅСµÆ 6

Error C141: syntax error, keilc141Error code:   1 typedef unsigned char uchar2 uchar KeyRowColumnScan () 3 {4 GPIO_KEY = 0x0f; 5 uchar key_value = 0; // error line 6 // 7 return key_value is omitted; 8}  Error message: Key_array.c (44): error C14

C language entry reference (3), C language entry reference 3. hello, world! Hello, world! Hello, world represents the beginning of everything. Programmers inject life and soul into the program. Every programmer should believe that code is live and

9-9-02. Write this number and write it in 9-9-02.1002. Write this number (20) Time Limit 400 ms memory limit 65536 kB code length limit 8000 B discriminant program Standard author CHEN, Yue Read a natural number n, calculate the sum of all its

A given string consists of only lowercase letters a, B, and c. When two different consecutive letters appear, you can replace them with another letter.If AB or ba appears consecutively, replace them with the letter c;When an ac or ca appears