delphi uses Foxit Quick PDF Library to read and write pdf Text and pictures

Introduction: Debenu Quick PDF Library(PDF programming development tool) provides a comprehensive set of PDF API functions to help you process PDF files quickly and easily. From the basic operation of document properties to the creation of your own PDF viewer and pdf editor, this software meets all your needs. Quick PDF Library is a SDK for PD ...

Posted on Tue, 12 Nov 2019 13:58:12 -0500 by XenoPhage

How Delphi calls the member function of VC class

How does Delphi call the member function of VC class? For example, the following VC code: class ITestObj { public: int MyAdd(int a, int b) { return a + b; } void ShowMSG() { ::MessageBoxA(0, (LPCSTR)"Delphi call VC Member function of class", (LPCS ...

Posted on Fri, 01 Nov 2019 12:39:28 -0400 by gvp16

Zhejiang University PTA program exercise 9-4 find books (20 points)

Exercise 9-4 find books (20 points) Given the name and pricing of n books, the title requires writing a program to find and output the name and pricing of the book with the highest and lowest pricing. Input format: Enter the first line to give the positive integer n (< 10), and then give the in ...

Posted on Sat, 19 Oct 2019 15:43:04 -0400 by yonta

Re-exploration of Delphi String

When I was idle, I began to pick up Delphi's source code. This time I found a more interesting function called StringCodePage, which returns the CodePage of the incoming string. As for what CodePage, it is considered to be character encoding. First test one: var s1: AnsiString; s2: WideString; s3: UTF8String; cp1, cp2, cp3: Word; begin ...

Posted on Thu, 10 Oct 2019 05:45:14 -0400 by spikypunker

System V semaphore

Catalog 1. System V IPC Summary IPC keys and ftok functions ipc_perm structure Creating and Opening IPC Objects ipcs and ipcrm commands 2. System V semaphores Counting semaphore set semget semop semctl 3. Test procedures code imple ...

Posted on Tue, 17 Sep 2019 11:42:04 -0400 by spider22

In-depth Vue Response Principle

Deep into Vue.js Responsive Principle First, create a Vue application new Vue({ data() { return { name: 'yjh', }; }, router, store, render: h => h(App), }).$mount('#app');   Second, what happens when you instantiate a Vue application? this._init() callHook(vm, 'beforeCreate') observe(vm._d ...

Posted on Sun, 18 Aug 2019 11:47:29 -0400 by Aikon

Java Basic Tutorial - Packaging Classes

When Java came out, it called itself "pure object-oriented language", which means that the so-called "object-oriented language" before was not pure. But Java has also been accused of being impure -- eight basic types are not class types. To this end, Java provides them with corresponding class types, which are "wrapper ...

Posted on Fri, 12 Jul 2019 15:03:35 -0400 by heals1ic

[SimpleMsgPack.NET] Publishes an analytical open source library for version C of msgpack protocol

Reference page: http://www.yuanjiaocheng.net/CSharp/Csharp-keys.html http://www.yuanjiaocheng.net/CSharp/csharp-interface.html http://www.yuanjiaocheng.net/CSharp/Csharp-operators.html http://www.yuanjiaocheng.net/CSharp/Csharp-if-else.html http://www.yuanjiaocheng.net/CSharp/Csharp-ternary-operator.html In the past two years, we have been payi ...

Posted on Sat, 23 Mar 2019 21:36:52 -0400 by moonie