1. Character Arrays and Strings #include <stdio.h> int main(int argc, const char *argv[]) { // "abcde" // Multiple characters can be stored in a character array. char s1[5] = {'a', 'b', 'c', 'd', 'e'}; int i = 0; for (i = 0; i < 5; i++) { printf("%c", s1[i]); } printf("\n"); // "www.hqyj.com" // A … Read more
📌 Problem Description Write a program to output a standard 9×9 multiplication table with the following requirements: Present in astaircase alignment format Allow the user to input n and output an n×n multiplication table Advanced: Implement with the least amount of code (testing code simplification ability) Example output: 1×1=1 1×2=2 2×2=4 1×3=3 2×3=6 3×3=9 … … Read more
Task: Draw the standard national flag (outline diagram).The Flag Law of the People’s Republic of China: The national flag of the People’s Republic of China is the Five-Star Red Flag. The national flag is a symbol and sign of the People’s Republic of China. Every citizen and organization should respect and cherish the national flag.In … Read more
📌 Problem Description Input a positive integer n and output the digital pyramid in the following format (for n=5 as an example): 1 121 12321 1234321 123454321 Requirements: The numbers must be arranged symmetrically. Loops and conditional statements are allowed. Advanced: Implement with the simplest code possible. Difficulty: ⭐️⭐️ (suitable for learners mastering loops and … Read more
▌When your code compiles, the disaster is just beginning（Motor brake signals turning into throttle commands / Ventilator tidal volume calculators starting to dance / Satellite attitude control systems initiating a space waltz—these real incidents stem from what you thought were harmless syntactic sugars） 1. Quantum Entanglement of Function Declarations ‘Weapon Code’ void (*get_handler())[]; // You … Read more
Good luck! Encountering a rainbow signifies a turning point and rebirth after difficulties, and beauty is about to arrive. The seven colors of the rainbow, from the outside to the inside, are red, orange, yellow, green, blue, indigo, and violet. This order is fixed and is formed by the refraction and reflection of sunlight through … Read more
Application of Nested Loops in C Language: break and continue Statements 【Problem 1】The multiplication table for elementary school students, known as the “Nine-Nine Multiplication Table,” is a 9×9 grid where both rows and columns range from 1 to 9, as shown in the table. #include <stdio.h> int main() { int i, j; for (i = … Read more
First, let’s address two questions ◆ What are the differences between pointers and references? ◆ When should we use pointers? When should we use references? Differences between Pointers and References See the code below: A pointer is used to represent a memory address, and this pointer is the address of the variable it points to. … Read more
Author: Yan Weimin, Wu Weimin, Mi Ning, Published by: Tsinghua University PressPublication Date: February 1999 Content Summary The content of the exercise section corresponds to the book “Data Structures” (C Language Version) and is divided into 12 chapters. Each chapter generally consists of five parts: basic content, learning points, algorithm demonstration content, basic knowledge questions, … Read more
In the C language, a union is a special custom data type that allows different types of data to be stored in the same memory location. Unlike a structure, all members of a union share the same memory segment, which means that at any given time, a union can only store the value of one … Read more