programming logic

Introduction to PLC: Essential Guide for Beginners with Detailed Explanations of Two Basic PLC Control Programs

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Introduction to PLC: Essential Guide for Beginners with Detailed Explanations of Two Basic PLC Control Programs

Hello everyone! Today, I bring you two PLC control cases that are very suitable for beginners in electrical automation, helping you quickly grasp basic programming logic. Remember to bookmark and share this with your classmates to progress together! 💡 01Sequential Start and Stop 📌 Application Scenario: In industrial ventilation systems, multiple fans often need to … Read more

Learning Programming with Kids: C++ Lesson 6 – Execution Logic of Nested Conditional Statements and Using Multi-branch Statements for Conditional Judgments

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Learning Programming with Kids: C++ Lesson 6 - Execution Logic of Nested Conditional Statements and Using Multi-branch Statements for Conditional Judgments

1. Nested if and if elseThe nested if and if else refers to including another if else statement within an if or else code block. This structure allows us to execute different code blocks based on multiple conditions.Framework 1:if (condition){ if(condition) { // Code Block 1 } else { // Code Block 2 }}else{ // … Read more

Understanding PLC Scanning Cycle: A Classic Example

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Understanding PLC Scanning Cycle: A Classic Example

Previously, I introduced the concept of dual coils due to the PLC scanning cycle. Regarding this scanning cycle, I have found that many friends, when starting to write programs, often see no issues with the program, and the PLC shows no errors or alarms, yet the results are incorrect. This is likely due to the … Read more

C++ Practice Problem – Maximum Number Problem

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C++ Practice Problem - Maximum Number Problem

Time Limit: 2s Memory Limit: 192MB Problem Description Input several integers, ending with -1. Output the maximum number among them. Input Format Several integers. (End input with -1) Output Format The maximum number among them. Sample Input 1 2 5 7 8 6 1 -6 -1 Sample Output 8 Code #include <iostream>#include <climits> // For … Read more

C++ Competition Daily Problem – Day 822

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C++ Competition Daily Problem - Day 822

Today is the 822th day of learning programming with a slightly cold rain! Hello, everyone! This is the CSP 2024 Group J Preliminary Exam Questions. Day 822 CSP 2024 Group J Preliminary Exam Questions Read the Program 2. Read the Program (The program input does not exceed the defined range of arrays or strings; for … Read more

A Comprehensive Analysis of C++ Branching Statements: The Magic of Making Programs ‘Think’

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A Comprehensive Analysis of C++ Branching Statements: The Magic of Making Programs 'Think'

Branching statements are decision-making tools in programming that allow a program to execute different operations based on various conditions, achieving true intelligent processing. 🌟 Why Do We Need Branching Statements? Imagine scenarios in life where choices must be made: If it rains, take an umbrella If the score ≥ 90, grade it as A If … Read more

Python Rehabilitation Week 3

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Python Rehabilitation Week 3

Today I completed the content for week three, which included many commands, especially various string manipulations such as slicing, splitting, and formatting. Among them, creating a progress bar needs to be run in cmd, and I haven’t found a feasible method yet.In today’s exercises, I encountered a problem related to the Caesar cipher. This seemed … Read more

C Language Classroom: Relational Expressions

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C Language Classroom: Relational Expressions

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