structure

C++学习笔记

给你一囗甜甜゛ 提交于 2021-02-02 05:30:14
系统的记录C++学习过程。 参考资料: 1 www.learncpp.com 2 www.cplusplus.happcodings.com 3 www.uplinux.com 来源: oschina 链接: https://my.oschina.net/u/185161/blog/32649

Find item in array of structure

て烟熏妆下的殇ゞ 提交于 2021-01-28 05:45:47
问题 I have a question. Imagine that in vb.net, fill a array of structure with a lot of items. For example, here I declare the structure called Persons: Public structure Persons Dim name as string Dim age as integer End structure Then, I declare a variable that is a array of persons, for make a list of friends, like this: Dim friends() as Persons friends(0).name = "Sebastian" friends(0).age = 19 friends(1).name = "Michael" friends(1).age = 34 ... So, there are any form to locate where is the

Copying array in C v/s copying structure in C

自作多情 提交于 2020-07-10 11:55:38
问题 Arrays and structures in C store data in memory which is contiguous. Then why is that C does not allow direct copying of arrays using "=" where as it is allowed for structure. Example: int a[3] = {1,2,3}; int b[3]; b = a; // why is this not allowed. struct book b1, b2; b1.page = 100; b1.price = 10.0; b2 = b1; // Why is this allowed 回答1: For the first question You cannot directly write to an array, you can write only to the individual cells to an array. You can use a for loop to initialize

My structure does not conform to protocol 'Decodable' / 'Encodable'

不想你离开。 提交于 2020-06-28 08:07:43
问题 I was trying to use Codable to save my data from the app I am creating but when I put Codable into my structure I keep getting the error: Type 'ReminderGroups' does not conform to protocol 'Decodable' and Type 'ReminderGroups' does not conform to protocol 'Encodable' struct ReminderGroups: Codable { var contentsArray: [ReminderItem] = [] var reminderName: String = "" var reminderItem: UIImage = #imageLiteral(resourceName: "Folder") } 回答1: In order for a class or a struct to conform to a