struct

问题 This question already has answers here : typedef struct vs struct definitions [duplicate] (12 answers) Closed 3 years ago . I am getting a hard time understanding this sample of code: typedef struct node { int data; struct node * next; } node; typedef node * nodepointer; So, we are building the struct node using typedef... I assume we are doing this in order to initialize the struct without the "struct" keyword being necessary. I want to ask why in the struct definition we used the name "node

问题 What is the equivalent of with from Pascal language in C/C++ language? A with statement is a shorthand for referencing the fields of a record or the fields, properties, and methods of an object. Example With (Object) do begin Width:=200; Height:=300; end; Is Equivalent with: Object.Width=200; Object.Height=200; 回答1: I don't believe that there is any direct equivalent to that statement in c/c++. If your objective is to avoid repeatedly typing "Object", then I suppose you could use a reference

问题 struct book { unsigned short size_of_content; unsigned short price; unsigned char *content; }; Assume I have file that contains multiple book s, each has different size_of_content , price and content . How can I read them one book at a time and identify which book it is (check price, for example)? size_t nread2; struct book *buff = malloc(sizeof(struct book)); while( (nread2 = fread(buff, sizeof(struct book), 1, infp)) > 0 ) { printf("read a struct once \n"); } This is what I have so far. I

问题 struct book { unsigned short size_of_content; unsigned short price; unsigned char *content; }; Assume I have file that contains multiple book s, each has different size_of_content , price and content . How can I read them one book at a time and identify which book it is (check price, for example)? size_t nread2; struct book *buff = malloc(sizeof(struct book)); while( (nread2 = fread(buff, sizeof(struct book), 1, infp)) > 0 ) { printf("read a struct once \n"); } This is what I have so far. I

问题 Wondering if someone could help me out with filtering using predicates in Swift. I have a somewhat messy datasource that I am using to populate a UITableView. The data source is an array of structures. The struct is defined as follows: struct Exercises { let category: String let name : String let x_seed: [Double] let y_seed: [Double] let hasMult: Bool } Now in my tableview controller I'm holding an array of structures that contains all of the data for the table. class MainTableViewController:

问题 Is the following, at file scope, a type declaration or an unnamed variable? struct student_s { char* name; int age; double height; struct student_s* next; }; If it is a type definition, then what is the difference with: typedef struct student_s { char* name; int age; double height; struct student_s* next; }; ? (Background: see my answer at Changing a variable from global to local - C, where I believe the first introduces an unnamed variable that is then optimized away by the compiler.) Note :

问题 This function is supposed to read a fraction and place it in an array. If the user enters '0' the function is supposed to exit. I am trying to do this using the cin.peek() function but execution always goes into the if statement and doesn't allow the user to exit. How should I properly code this (I am open to not using peek(), I thought it was the simplest way of doing it.) Thanks! void enterFrac(Fraction* fracs[], int& index) { int n, d; char c, slash; cout << "Enter fractions (end by

问题 An object of a struct/class (that has no constructor ) can be created using an initializer list . Why is this not allowed on struct/class with constructor ? struct r { int a; }; struct s { int a; s() : a(0) {} }; r = { 1 }; // works s = { 1 }; // does not work 回答1: No, an object with a constructor is no longer considered a POD (plain old data). Objects must only contain other POD types as non-static members (including basic types). A POD can have static functions and static complex data

问题 This question already has answers here : C# Structs: Unassigned local variable? (2 answers) Closed 2 years ago . I have one observation about struct. When I declare a property in Struct and if I don't initialize the Struct then it gives me the below error - "Use of unassigned local variable empStruct" PSeduo Code- struct EmpStruct { private int firstNumber; public int FirstNumber { get { return firstNumber; } set { firstNumber = value; } } public int SecondNumber; } Program.cs- EmpStruct

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . struct a{static int z;}l; (a is declared at file scope) I cant initialize the z using a initializer list. what does a static struct member mean? does z(name) have external linkage and public access as well? (I thought it meant you give it file scope and group it under a(and has public access through a object)?.