Click the aboveblue text to follow us Memory leaks are a serious issue in embedded system development, especially in resource-constrained environments. Unlike desktop applications, embedded systems often have strict memory limitations, where even small memory leaks can quickly lead to system crashes or functional anomalies. A memory leak refers to a situation where a program … Read more
Hello everyone! Today we will discuss how to effectively use C++ exception handling in Excel data processing. 1. Why is Exception Handling Necessary? Imagine you are importing a 500MB Excel file and suddenly discover that the file is corrupted—an application without exception handling would crash directly, while one with exception handling can gracefully inform the … Read more
Automation Solutions for Food Processing: Practical Applications of Allen-Bradley PLC Introduction Hello everyone, I am your old friend Lei, and I have been engaged in the industrial automation field for 15 years, mainly focusing on the design and implementation of automation solutions in the food processing industry. Over the years, I have witnessed the automation … Read more
Friends, have you watched a bunch of Python tutorials but still can’t write code? Don’t worry, today I will share some practical tips that those tutorials didn’t cover. 1. Understand this first: How does Python actually run code? Many beginners don’t even know how to execute a .py file. Try this: Execution method: Open the … Read more
Respect Function Interfaces and Minimize Internal Modifications C++ Code Statements are divided into: built-in types, names, variables, operators, scalars, strings, preprocessor directives (such as #include), etc.Classes in C++ are defined to organize data structuresThe header files of the standard library are enclosed in angle brackets < >, while non-standard library header files are enclosed in … Read more
1) Exception Hierarchy Python has many built-in exceptions that we may encounter from time to time, such as ZeroDivisionError, KeyError, ValueError, TypeError, and so on. Each exception is part of an exception hierarchy — this means that most exceptions inherit from the same parent class Exception in some way. We can see this by printing … Read more
These experiences may help you avoid some debugging pitfalls. Trap 1: Memory Management Issues in Python Python is a programming language that can automatically manage memory, making programming more convenient. Most of the time, Python’s memory management works excellently. However, sometimes Python needs to better understand the actual situation of the program to manage memory … Read more
Click the blue "Arm Selection" in the top left corner and select "Set as Favorite" 1. Interrupt Response Model of 51 Microcontroller Let’s recall the use of interrupts in microcontrollers. As shown in the figure below, on the left is the pin diagram of the 51 microcontroller, where P3.0-P3.5 are the corresponding interrupt pins. When … Read more
Deep Understanding of Exception Class Hierarchy The C++ Standard Library provides a rich set of exception classes that form a hierarchy. std::exception is the base class for all exception classes, defining a virtual function what() to return a string describing the exception. For example: #include <iostream> #include <exception> int main() { try { throw std::exception(); … Read more
In C++, we often hear the term “exception safety”. It is not only about whether the program runs stably but also closely related to performance. The protagonist we are discussing today, noexcept, is a keyword closely related to exceptions. It can help us optimize program performance, but improper use may also create “hidden traps”. Today, … Read more