This review focuses on core techniques for arrays and linked lists, including practical C++ implementations. Arrays The most important concept for array problems is the two-pointer technique. Fast and Slow Pointers When removing or manipulating elements, nested loops lead to O(n²) time complexity. U...
Dynamic Memory Allocation and Pointer Vairable Example Input and run the program, observe the output, and explain the purpose of each line. #include<iostream> using namespace std; int main(){ int *ptr, index; ptr = new int[5]; if (ptr == NULL) exit(0); *(ptr + 1) = 3; for (index = 0; index &l...
Default Arguments Default parameter values must be assigned from right to left. int add(int x = 10, int y); // error int add(int x, int y = 20); // ok int add(int x = 10, int y = 20); // ok A default may be given in either the function declaration or its definition, but not both within the same scop...
Encapsulating containers like map and set with a single Red-Black Tree (RBTree) template presents several design considerations. The key goals include implementing iterators, supporting increment/decrement operations, and enforcing container-specific constraints: preventing value modification in set...
1. Qt Signals and Slots What are Signals and Slots? A signal is an event emitted under specific circumstances. For example, the most comon signal for a PushButton is clicked(), emitted when the mouse clicks the button. A slot is a function that responds to a signal. A slot can be associated with a s...
8. Enhancing Fall and Collision Behavior The current ball movement uses constant velocity, lacking realistic deceleration during bounces. Introducing basic physics calculations improves the visual fidelity. While professional open-source physics angines like Box2D and PhysX offer advanced simulation...
Motivation Digital circuits are often modeled as directed acyclic graphs. Given a boolean circuit and a vector of input values, the task is to compute the output values of every gate. A straightforward evaluation method is a topological traversal. This note presents structural techniques that can ac...
Configuring Icons in Qt 6.7.2 on Windows Using CMake Setting the Executable Icon Prepare an icon file named app_icon.ico. Create a resource script file named icon_resource.rc with the following content: IDI_ICON1 ICON "app_icon.ico" Add app_icon.ico and icon_resource.rc to your Qt Resource...
C++ offers a rich set of built-in operators to various computational tasks including arithmetic, logical, bitwise, and relational operations. A powerful feature allows these symbols to be redefined for user-defined types, enhancing readability and intuitive usage. Standard Operator Categories Arithm...
Memory Layout and the Role of Pointers A linked list orgnaizes data across dynamically allocated, non-contiguous blocks of heap memory. Its core is the pointer relationship between nodes, not the data itself. // Nodes are created at independent memory addresses Node* first = new Node(15); // address...
