I believe that such a bug can be made by even the most skilled programmers. Come and see the bug that the author made. First, the author wanted to use a piece of code to create a file. If a filename is provided, it creates a real file; if not, it calls tmpfile() to create … Read more
1. Common Input and Output Functions Understanding input and output functions is sufficient; being able to use one method is enough. Because input and output directly interact with the terminal, in actual development, there are basically no programs that directly interact with the terminal. 1.1 putchar()/getchar() putchar() Prototype: int putchar(int c); Function: Outputs a character … Read more
“To become a master, it is not achieved overnight, unless one is a natural talent in martial arts, but such people… are one in a million.” —— LandladyThis principle also applies to learning C language. There are indeed few people with extraordinary talent in programming; most of us need to go through continuous learning to … Read more
Recent Hot Articles 2025 Latest C Language Learning Path | Beginner, Intermediate, PracticalC Language Learning Guide: Have You Mastered These Core Knowledge Points?C Language Functions: From Beginner to Mastery – A Comprehensive GuideBeginner’s Guide to Avoiding Pitfalls in C Language: Avoid These 12 Devilish Details for Double Efficiency!C Language Examples | Creating, Inserting, and Traversing … Read more
Creating two versions of a calendar program with different printing formats. Thanks to Hao Yingjun for his guidance. The calendar programming done by Hao Yingjun outputs the calendar by either going backward or forward based on fixed dates. My implementation is based on the premise that January 1st of the year is a Monday, using … Read more
Are the heights of the two rectangles the same? Please adjust your seating position and distance, and carefully look back and forth with the code.The light source is fixed at a certain position on the left, uniformly shining to the right, with equal spacing between each pair of adjacent white light beams. Two rectangles are … Read more
1. Branch Control Statements 1.2 switch..case Statement 1.2.1 Format switch(expression){ case constant_expression1: code_block1; break; case constant_expression2: code_block2; break; case constant_expressionn: code_blockn; break; default: other_branch; break;} 1.2.2 Notes 1. The expression is generally a variable, which can also be a variable expression, and the constant expressions after case represent all possible values of this variable; 2. … Read more
Bit Manipulation Operators The bit manipulation operators in C language include bitwise AND (&), bitwise OR (|), bitwise XOR (^), bitwise NOT (~), left shift (<<), and right shift (>>). Bitwise AND (&): The result bit is 1 only when both corresponding binary bits of the operands are 1; otherwise, it is 0. For example, … Read more
1. Prioritizing Development Efficiency The simplicity of Python: Python’s syntax is close to natural language, and the amount of code is usually only 1/5 to 1/10 of that in C. For example, to implement matrix multiplication: # Python result = numpy.dot(matrix_a, matrix_b) In contrast, C requires manual memory management, loops, and pointers, significantly increasing code … Read more
📌 Problem Description Write a function to swap the values of two integer variables. Example Input: a = 5, b = 10 Example Output: a = 10, b = 5 Difficulty: ⭐ (suitable for beginners, but how many methods can you think of?) 💡 Initial Thoughts You might think: “Isn’t this just using a temporary … Read more