Defining the same function in different C source filesIn general, to maintain the simplicity and efficiency of the program, it is not recommended to define the same function (with the same return type and parameter types) in different C source files. Otherwise, the compiler may throw an error indicating multiple definitions, as shown in the … Read more
Multiple return valuesIn C language, a function can generally return only one value by default. So, how can we design a function to return two or more values?Example of a standard library functionBefore that, let’s recall a standard library function in C language that we previously introduced, ldiv(). This function can be used to perform … Read more
Today, we will explore an important concept that plays the role of a judge in programming—relational expressions. 1. Explanation of Knowledge Points 1. What is a Relational Expression? In C language, a relational expression is an expression used to compare the relationship between two values. It consists of two operands (which can be variables, constants, … Read more
A teaching project, a simple HTTP server implemented in C language. github.com/mustafa-khann/http-server The project will be built from scratch, aiming to understand the principles of web servers and the HTTP protocol. Currently still in serialization, ✨ The first phase aims to implement: Single-threaded HTTP/1.1 server – handling one request at a time Support for GET … Read more
Key Summary：After a function call, the operation is performed on the initialized parameter, not the argument!Function Parameters and ArgumentsIn C language, depending on the different states of the function, the parameters can be roughly divided into two categories: one is formal parameters, and the other is actual parameters.Formal parametersare the parameters declared in the function … Read more
Recommended Advanced Books ↑↑↑ Recommended Reading C Language Dynamic Memory Management: From Beginner to Pro, Understand It All in One Article C Language Pointers: From Beginner to Pro, Understand It All in One Article C Language File Operations: From Beginner to Pro, Understand It All in One Article Top Ten Sorting Algorithms in C Language, … Read more
Introduction The C language was born in 1972 and has been around for 47 years, making it quite an old language. However, it remains very popular and continues to rank among the top programming languages, demonstrating remarkable vitality. C is often labeled as <span>procedural</span>, and many students have not considered or practiced developing C code … Read more
In the C language, pointers are one of the most fundamental, powerful, and easily confused concepts. They are not only tools for accessing memory but also play a crucial role in arrays, functions, structures, and many other areas. Below, I will guide you to fully understand the essence, types, uses, and examples of C language … Read more
1. Multiple Choice Questions In the following code snippet, the final value of <span><span>x</span></span> is ( ) int x = 10;x += 5 * 2;x /= 3; A. 5 B. 6 C. 15 D. 20Answer: BExplanation:<span><span>x += 5 * 2</span></span> is equivalent to <span><span>x = x + 5 * 2</span></span>, thus <span><span>x = 10 + … Read more
Hello everyone, I am Xiao Feng Ge. This will be a series of articles related to the C language. In the previous article, we learned why we should use C language to develop operating systems. In this article, we will look at how C language controls hardware. The Design Philosophy of C Language The design … Read more