Introduction Today, we will discuss DP, which stands for Dynamic Programming. There are many types of DP, such as Knapsack DP, Digit DP, Tree DP, and Bitmask DP… These are all advanced skills that I will share with you in the future. For today, let’s simply understand the basics of DP. 01 Dynamic Programming Concepts … Read more
C++ unique_ptr Exclusive Ownership Management In modern C++, memory management is an important topic. Traditional manual memory management can easily lead to issues such as memory leaks and dangling pointers. To simplify this process, C++11 introduced smart pointers, among which <span>std::unique_ptr</span> is a very useful tool that provides exclusive ownership features. What is unique_ptr? <span>std::unique_ptr</span> … Read more
C++ Advanced: In-Depth Understanding of Virtual Functions, Inheritance, and Polymorphism In C++ object-oriented programming, inheritance and polymorphism are two core concepts. Today, we will delve into several important features closely related to polymorphism in C++: virtual functions, the <span>virtual</span> keyword, the <span>override</span> keyword, multiple inheritance, and virtual inheritance. These topics are key to understanding the … Read more
Here is a simple summary of some programming mistakes that C++ beginners often make, providing a reference for newcomers. 1. Some keywords are unnecessarily repeated in the cpp file For C++ classes, some keywords only need to be written in the .h file and do not need to be repeated in the cpp file, such … Read more
Time Limit: 2s Memory Limit: 192MB Problem Description Calculate the square root using the iterative method Formula: The iterative formula for finding the square root of a is: X[n+1]=(X[n]+a/X[n])/2. The absolute difference between two consecutive results must be less than 0.00001. Output should be rounded to 3 decimal places. Input Format X Output Format The … Read more
Practical Analysis of C++ Type Traits Programming In C++, type traits are a powerful tool that allows us to query and manipulate type information at compile time. By using type traits, we can achieve more flexible and reusable code. This article will provide a detailed introduction to type traits in C++, including their basic concepts, … Read more
Introduction to C++ Graphical User Interface Development A graphical user interface (GUI) is an essential component of modern software applications. C++, as a powerful programming language, offers various libraries and frameworks to assist developers in creating graphical user interfaces. In this article, we will introduce how to use the Qt framework for C++ GUI development … Read more
String manipulation is commonly used in daily programming, such as searching, replacing, comparing, and inserting. Below, I will introduce some operations in the C++ environment that I can run on my machine. Searching using the function str.find() Replacing using str.replace(). Note that Chinese characters are three bytes. Comparing using str.compare() Inserting using str.insert() The above … Read more
Detailed Syntax of C++ Lambda Expressions In modern C++, lambda expressions are a very powerful feature that allows us to define anonymous functions and pass them as parameters to other functions. The introduction of lambda expressions makes the code more concise and easier to maintain, especially when dealing with callbacks, event handling, and algorithms. What … Read more
Setting Breakpoints and Monitoring Variables in C++ In C++ development, debugging is a crucial step. By setting breakpoints and monitoring variables, we can better understand the execution flow of the program and quickly locate issues. This article will detail how to use breakpoints and variable monitoring in C++, along with corresponding code demonstrations. What is … Read more