Notice when we improt files in Objective-C

最新推荐文章于 2022-02-25 18:19:43 发布
原创 最新推荐文章于 2022-02-25 18:19:43 发布 · 147 阅读 · 0 ·
CC 4.0 BY-SA版权
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
文章标签：

#Objective-C #C #C++ #C#

本文探讨了在编程中导入不同类型的文件时使用引号与尖括号的区别。引号用于从当前实现文件所在的目录开始查找文件，而尖括号则指示预处理器跳过当前目录，通常用于导入框架文件。

      Notice that for importing class header files that are not frameworks, the header file name is in quotes rather than the angle brackets used for importing frameworks (as was  done in the header file). The difference between quotes and brackets is that quotes instruct the preprocessor to start looking for the file within the same directory as the current implementation file. Since framework files are stored elsewhere, the angle brackets tell the preprocessor to skip the current directory.

自然语言处理NLP星空智能对话机器人系列：深入理解Transformer自然语言处理 Training a GPT-2 language model Steps 10
大模型与Agent智能体
10-12 586
自然语言处理NLP星空智能对话机器人系列：深入理解Transformer自然语言处理 Training a GPT-2 language model Steps 10 目录 Step 10: Creating a training model directoryContext and completion examples星空智能对话机器人系列博客 Step 10: Creating a training model directory 本节将为我们的模型创建一个临时目录，存储我们需要的信息，并将其重命名以
【AFURLRequestSerialization用于帮助构建NSURLRequest】1.构建普通请求：格式化请求参数，生成HTTP Header。 2.构建multipart请求
专注于计算机研发知识和资讯分享
12-10 1万+
文章目录前言 前言
Embedding Python in Objective-C: Part 2
yuanya的专栏
04-20 1523
Embedding Python in Objective-C: Part 2 Virgil Dupras 2012-01-20 Two years ago, I wrote about how I embedded Python in Objective-C through PyObjC. It worked well and everything was fine. The only
Objective-C中的CocoaPods教程
wj52188的专栏
11-13 1607
In this tutorial, you’ll learn how to use a popular dependency management tool called CocoaPods. But wait! What is a dependency management tool and why do you need one? As an iOS developer, you ce
Mixing Objective-C, C++ and Objective-C++: an Updated Summary
wanglang3081的专栏
04-03 1142
Quite some time ago, I ran into the situation of including a C++ library in an Objective-C project. I failed to find any sensible documentation on the subject, so I came up with a solution myself and
Write Objective-C Code--编写Objective-C 代码
06-06 298
Back to Language Write Objective-C Code If you haven’t programmed for either OS X or iOS, you need to become acquainted with the primary programming language, Objective-C. Objective-C is...
Ry’s Objective-C Tutorial---C Basics
qq_28884869的博客
11-21 515
C Basics Objective-C is a strict superset of C, which means that it’s possible to seamlessly combine both languages in the same source file. In fact, Objective-C relies on C for most of its core
Learning Objective-C: A Primer
寻找生活和工作的支点
12-19 258
Referenced from: http://developer.apple.com/mac/library/referencelibrary/GettingStarted/Learning_Objective-C_A_Primer/index.html#//apple_ref/doc/uid/TP40007594   ====================================...
2014s406 Integrating Swift with Objective-C
WCX_0532的博客
02-20 664
 [ Silence ]  [ Applause ]  >> Good morning.  Welcome to Session 406:  Integrating Swift with Objective-C.  Now many of the Swift demos here at the conference start  by creating either a brand-n...
Objective-C Programming: The Big Nerd Ranch Guide (2nd Edition) 阅读笔记(Part III)
kuyeluofan的学习笔记
05-16 1612
• Objects ○ An object is similar to a struct, it can contain several pieces of related data. In a struct, we called them member. In an object, we call them instance variables.(or ivars)
From C++ to Objective-C
QQ18334373taikongyi的专栏
04-14 4110
FromC++ to Objective-C version2.1 en PierreChatelier e-mail:pierre.chatelier@club-internet.fr Copyrightc 2005, 2006, 2007, 2008, 2009 Pierre Chatelier Englishadaptation : Aaron Vegh Documentrevi
Ry’s Objective-C Tutorial---Founctions
qq_28884869的博客
11-21 911
Functions Along with variables, conditionals, and loops, functions are one of the fundamental components of any modern programming language. They let you reuse an arbitrary block of code throughout
Lab 1 - Chapter 1 Java Language Programming | Chapter 1: Foundations of Java and First Steps Course: Java Language Programming Instructor: Ahsan Shehzad Date: September 1, 2025 Lab Objective: Your First Java Program ✅ Goal By the end of this lab, you will have a fully functional Java development environment and will have successfully written, compiled, and run the "Hello, World!" program for our course project, MyContactManager . Prerequisites A computer with a modern operating system (Windows, macOS, or Linux). An active internet connection to download the required software. Final Result Step 1: Install the Java Development Kit (JDK) Goal Install the core toolkit that allows us to build and run Java applications. Instructions 1. Navigate to a trusted OpenJDK distributor like Adoptium. 2. Download the latest LTS (Long-Term Support) version installer for your operating system (e.g., Temurin 17 or 21). 3. Run the installer and follow the on-screen prompts, accepting the default settings. Ensure the "Add to PATH" option is checked if available. Verification Code Open a new terminal or command prompt after the installation is complete and run these commands:Expected Result The terminal should print the installed Java version (e.g., openjdk version "17.0.8" ). If you see an error like 'command not found' , your system's PATH variable may be misconfigured. Please ask for assistance. Step 2: Install a Professional IDE Goal Install IntelliJ IDEA, a powerful Integrated Development Environment (IDE) that will help us write, manage, and debug our code efficiently. Instructions 1. Go to the official JetBrains website: jetbrains.com/idea/download/. 2. Download the installer for the Community Edition, which is free. 3. Run the installer, accepting the default options. You can create a desktop shortcut for convenience. Expected Result The IntelliJ IDEA application should now be installed on your computer. You can launch it from your applications folder, desktop, or start menu. Step 3: Create the 'MyContactManager' Project Goal Create a new, organized project inside IntelliJ to house all the code for our course application. Instructions 1. Launch IntelliJ IDEA. If prompted, you can skip the initial configuration plugins. 2. On the welcome screen, click "New Project". 3. In the New Project window: Enter the Name: MyContactManager Set the Language: Java Set the Build system: IntelliJ For JDK: Select the JDK you just installed from the dropdown. It should be detected automatically. 4. Click "Create". # Check the Java Runtime Environment version java -version # Check the Java Compiler version javac -version 1 2 3 4 5Expected Result IntelliJ will create a project structure. In the Project Explorer pane on the left, you'll see a folder named src . This src (source) folder is where all of our .java files will live. Step 4: Write and Run the main Class Goal Write the entry point for our application and execute it to see output. Instructions 1. In the Project Explorer, right-click the blue src folder. 2. Select New -> Java Class . 3. In the pop-up, enter the name MyContactManager and press Enter. 4. Type (or copy) the following code into the editor window that appears. 5. To run the program, click the green play button ▶ that appears to the left of the public static void main line. Code Expected Result A "Run" tool window will appear at the bottom of IntelliJ, and you should see the following text output: Welcome to MyContactManager! /** * The main class for our MyContactManager application. * This class serves as the entry point for the program. */ public class MyContactManager { /** * The main method is automatically executed when the program runs. * @param args Command-line arguments (we will ignore these for now). */ public static void main(String[] args) { // System.out.println() is a built-in Java command // to print a line of text to the console. System.out.println("Welcome to MyContactManager!"); } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Step 5: Experiment and See an Error Goal Understand how the compiler helps us by catching syntax errors before the program runs. Instructions 1. Introduce an error: In your MyContactManager.java file, deliberately delete the semicolon ( ; ) at the end of the System.out.println(...) line. 2. Observe the IDE: Notice how IntelliJ immediately underlines the code in red and shows an error message if you hover over it. This is called real-time error checking, a key feature of an IDE. 3. Attempt to run: Click the green play button ▶ again. Erroneous Code Expected Result The program will fail to compile. The "Run" window will show a compile-time error, which will read something like java: ';' expected . This demonstrates how the compiler acts as a strict grammar checker for the Java language, preventing broken code from ever running. Simply add the semicolon back to fix it. 🚀 Challenges Finished the lab early? Try these small challenges to solidify your understanding. 1. Personalize It Modify the program to print a personalized welcome message, like "Hello, [Your Name]!" . 2. Multi-Line Output Add a second System.out.println() statement on a new line to print a description of the application, such as "This app will help you manage your contacts." . 3. Explore an IDE Warning The String[] args parameter in the main method is currently grayed out. Hover over it. The IDE is telling you it's an "unused parameter." This isn't an error, but a friendly warning that you've declared something you never use. public class MyContactManager { public static void main(String[] args) { // This line now has a deliberate syntax error! System.out.println("Welcome to MyContactManager!") // <-- Missing semicolon } } 1 2 3 4 5 6 答案是什么
最新发布
09-22
Scanner scanner = new Scanner(System.in); System.out.print("Please enter your age: "); int age = scanner.nextInt(); if (age >= 18) { System.out.println("You are an adult."); } else { System.out...
第二阶段-tensorflow程序图文详解（八）Debugging TensorFlow Programs
凡难事必作于细的博客
12-27 2176
TensorFlow debugger (tfdbg) is a specialized debugger for TensorFlow. It lets you view the internal structure and states of running TensorFlow graphs during training and inference, which is difficult t
渥太华大学OU-iti1120 Assignment 1课业解析
weixin_45602635的博客
09-24 721
题意：使用Python编写一些函数 解析： 1）编写一个勾股定理的判断函数，输入两个整数a,b如果存在另一个整数c2=a2+b^2则返回true，否则返回false； 2）编写一个英里/小时转换为公里每小时的函数； 3）输入三个数，xs、ys、side，x，y表示正方形左下角的坐标，side表示正方形的边长，函数的作用是判断一个坐标是否在正方形内部，边界也属于内部； 4）判断一个数字中是否含有数字...
Unity 【Content Size Fitter】- 聊天气泡自动适配Text文本框大小
当代野生程序猿
02-25 6828
通常在展示人物对话的时候文本的长度是不定的，因此会需要动态的调整对话内容文本框的背景图片的大小，这里以如下这种气泡框的对话为例： 实现该需求涉及到的内容包括Content Size Fitter组件的使用、2D Sprite工具包的使用。 Content Size Fitter组件用于Text文本框，如图所示，我们将Horzontal Fit设为Preferred Size，当我们调整Text文本框中的内容时，其大小会自动进行调整。 注意Rect Transform中Pivot轴心点的设置
新唐NUC972 Linux（一）：USB烧写linux出厂镜像
小破孩的博客
02-20 3850
USB烧写出厂镜像 文章目录USB烧写出厂镜像前言一、硬件连接二、安装驱动三、烧写linux程序四、运行程序 前言 今天开始进军linux，学了那么久单片机，也摸得七七八八，至少点个灯还是会的。本人之所以买酷客的linux开发板主要是便宜，资料也算齐全，虽然没有原子那么好，不过也够了，找那么多借口，其实就是qiong。今天先从USB烧录官方提供的linux相关程序到芯片开始吧。 一、硬件连接 1、连接电源线 2、RS232转USB，需要安装CH340驱动，用于在电脑串口超级终端中查看调试信息。 3、U
WeChall CTF Writeup（一）
weixin_43211186的博客
02-25 1850
以下题目标题组成： [Score] [Title] [Author] 文章目录0x01 1 Training: Get Sourced by Gizmore0x02 1 Training: Stegano I by Gizmore0x03 1 Training: Crypto - Caesar I by Gizmore0x04 1 Training: WWW-Robots by Gizmore0x05 1 Training: ASCII by Gizmore 0x01 1 Training: Get Sou
C语言每日一练——第126天：佩奇借书问题
热门推荐
Edison's 小宇宙
02-25 2万+
史上最强借书方案问题讲解（代码详解+思路分析+动图演示+特性总结）
评论
成就一亿技术人!
拼手气红包6.0元
还能输入1000个字符
 
红包 添加红包
表情包 插入表情
表情包 代码片
 条评论被折叠 查看
添加红包

请填写红包祝福语或标题

个

红包个数最小为10个

元

红包金额最低5元

当前余额3.43元 前往充值 >
需支付：10.00元
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付元
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明：

1.余额是钱包充值的虚拟货币，按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载，可以购买VIP、付费专栏及课程。

余额充值