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Why do we need flexible arrays? #define MAXLEN 1024 struct kd_node { struct kd_node*left; struct kd_node*right; int dim; unsigned long long data[MAXLEN]; }; In this code, in order to store data, an unsigned long long array with a length of 1024 is applied. If the array length is much smaller than MAXLEN. This design will be an extremely ...

1, The concept of pointer The pointer is actually a location where the address is stored. It is the same as the ordinary constant data defined by us. They only store different contents. Therefore, when using the pointer, we need to pay attention to the specific contents we store. In addition, the pointer can store the address of the pointer. ...

1, strlen() function The strlen() function counts the length of a string. #include <stdio.h> #include <string.h> int main() { char *p = "hello world"; int len = strlen(p); printf("p strlen[%d]\n", len); return 0; } 2, strcat() function strcat() is used to splice strings, receive two ...

1, Arithmetic operator Arithmetic operators + - * /% //% - Take mold //& modulo operators can only be used for integer types int main() { int ret1 = 9 / 2; printf("%d\n", ret1); // 4 // For both sides of / (division sign) are integers, integer division is performed double ret2 = 9 / 2.0; printf("%lf\n", ret2); // 4.500000 ...

BC1 practice produces true knowledge #include <stdio.h> int main() { printf("Practice makes perfect!\n"); return 0; } BC2 I'm big V #include <stdio.h> int main() { printf("v v\n v v \n v \n"); return 0; } BC3 has capacity #include <stdio.h> int main() { printf("The size of short is %d b ...

Catalogue of series articles Porting Linux 0.0 GPIO operation from 11 to Hi3518EV200 development board preface By lighting the LED light through basic experiments, you can be familiar with some basic knowledge of the target hardware platform, such as memory address space range, how to configure multiplexing pins, how to operate GPIO, ho ...

Several insertion, deletion and specified location output of bidirectional linked list Appearance of two-way linked list A two-way linked list is composed of a precursor pointer, a descendant pointer and a data field. The front and back pointers between nodes are connected to form a linked list Encapsulation of bidirectional linked list no ...

Preparation of program design experiment course ----Do a convenient mobile keyword search library, and then realize the timely information retrieval function ----After doing a simple C language introduction tutorial, send it to CSDN - thank you for the header song support provided by boss Wang Tinghao ----After improvement: make some necessa ...

catalogue Project introduction File creation menu Create chessboard Initialize chessboard Print chessboard Lay mines Demining Complete code Project introduction Like Sanzi, this project can be easily dealt with after learning functions and arrays. Rules of mine sweeping: enter the coordinates of a grid randomly, and a number will ...

Let's look at the topic first: 1015 theory of virtue and talent (25 points) Sima Guang, a historian of the Song Dynasty, wrote a famous "theory of virtue and talent" in Zizhi Tongjian: "therefore, the perfection of talent and morality is called a saint, the death of talent and morality is called a fool, the victory of virtue is ...