When learning C++, you may come across function declarations like this: class Point { public: int GetX() const; }; Then you might wonder: “What does this <span>const</span> at the end of the function mean? Why is it added?” 🤔 Actually, it represents a constant member function (<span>const</span> member function), let’s take a closer look. What … Read more
const specifies the semantic constraint of “not modifiable”. It can modify various variables to be constants; when modifying a pointer, appearing on the left side of * indicates that the pointed object is constant, while appearing on the right side indicates that the pointer itself is constant. However, const is more commonly used in function … Read more
Author:PhyJack https://www.cnblogs.com/phyjack/p/18445368 Overview This article provides a detailed introduction to pointers of ordinary functions and member functions of classes in C/C++. It explains practical techniques for using function pointers as inputs to other functions, return values, and how typedef can enhance code readability, illustrated with C++ code examples. For member function pointers of classes, the … Read more
Constant Member Functions and Constant Objects in C++ In C++, understanding the concept of constants (const) is crucial for writing safe and efficient code. Among these, constant member functions and constant objects are two important concepts. This article will detail these two concepts and demonstrate them with example code. Constant Objects First, let’s understand what … Read more