struct

问题 This question already has answers here : Structs with pointer to next struct (4 answers) Closed 5 years ago . I want to have a session where I insert totally 10 different integers in the size variable that is inside the linked list. I believe I should use result_register() for this? When all 10 integers are stored I want to print them out by typing result->size . I am new with linked lists so please be gentle. struct result { int size; }; struct result* result_next() { // What do I type here?

问题 I am using a for loop with fscanf to input 5 columns from a file into an array of structs.Each struct has 5 variables: 1 string and 4 ints, the first fscanf reads a string name and stores it as part of a struct the other 4 input integers into said struct(all to different variables of the struct). With normal input it works fine. but when a character is input into one of the integer columns the scanf puts 0 for that and the rest of the values of that struct and uses char as if it was a new

问题 I have a UITableViewController. Each row is populated from a global array. This global array Describes the title of a task. Each task has some associated variables which are strings. I want to be able to click on the title of task in the table view controller and have the associated variables linked to that title. The global array will be grow and shrink as the end user appends or removes titles from the global array. This is made with a struct. The struct contains the specific variables. The

问题 A friend and I are trying to teach ourselves C and have decided to do, a what was first thought to be easy, an exercise, where we create a struct of two char containing 1. the forename and 2. the surname. A function read_person gets the users input, saves it in the structure and returns it. The input should be saved in a dynamically allocated array (all of which we have allegedly done correct so far). Then, using qsort, the array should be sorted ascendingly when it comes to the forename,

问题 I have the part of the following C code that uses data from a file names WMM.COF and uses the data stored in the file to compute the magnetic field of the earth. The program works perfectly except I can't have the program access the external file; I want to have all of the data already stored in the program. I tried using a structure array to replicate the data and then put the array into a string but this causes an error in the program and doesn't produce the correct results. Here is the

问题 As I am conditionally checking, I cannot return "some view" for the func doFavoriteMath . private func doFavoriteMath(section: Labvalueslist) -> some View { for numbers in userData.favoriteIDS { if section.id == (numbers) { return ItemRow(list: section) } } } var body: some View { NavigationView { List { ForEach(userData.labvaluesUserdata) {section in self.doFavoriteMath(section: section) } } } } 回答1: There's no need to return an opaque type from your function. It always returns something of

问题 i have a file needed to be read by code. The file is shown as below. The very first line of the file contains a single integer, indicating the number of journal entries in the file. I need to write a C program to read a file and store the contents in a dynamically-allocated array of structs. 4 12/04/2010 Interview went well I think, though was told to wear shoes. 18/04/2010 Doc advised me to concentrate on something... I forget. 03/05/2010 Was asked today if I was an art exhibit. 19/05/2010

问题 I try to find my user in MongoDB but when I run this code : type Person struct { Id bson.ObjectId `bson:"_id,omitempty"`//`json:"id" bson:"_id,omitempty"` username string `json:"username" bson:"username"` score string `json:"score" bson:"score"` level string `json:"level" bson:"level"` } result := Person{} var id = "5b8a45912ed6f24d945bee38" err = c.Find(bson.M{"_id":bson.ObjectIdHex(id)}).Select(bson.M{"username": 1, "score":1, "level": 1}).One(&result) fmt.Println(result) Just It show me :

问题 I'm working on a driver for a scanner. Got dll and header files from provider, aside of a manual in PDF, written in native C++ (dont have source code). Need to use it within a C# project but I'm having problems with the structs (either trying to read or send them). I got the dll methods using the Command Prompt, demangling them in a website (since it has +100). Of course, I wont use all of them, just the ones I need. Didn't have problems with the ones using primitive data types, in fact, made

问题 I know why I would use a struct as opposed to a class, but how could I best tell which is being used by an API I'm using? Obviously looking at the header file (or hopefully documentation) should make it immediately obvious. I am wondering if there is a way to know if the object I am using is a struct or class on face value though? 回答1: Auto completion in Xcode knows the type of type: 回答2: You can’t inherit from other structures or types. Classes have the ability to inherit functions,