struct

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 days ago . Improve this question I want to operate in Octave in a similar manner as done with python pandas. I concluded the most similar object to a dataframe in Octave is a struct. I have a few related questions. How can I create a new field 'nf' in struct mystr , by operating (row-by-row)

问题 I have following struct: public protocol SuperModel { // empty protocol } struct ModelOne: SuperModel { struct SubModelOne { var someVar: Double var othervar: Double? } var sub: SubModelOne? mutating func setSub(sub: SubModelOne) { self.sub = sub } } In my class, I want to use this struct like that: final class SomeClass: SuperClass { var data: SuperModel init() { self.data = ModelOne() } func someFunc() { (self.data as! ModelOne).setSub(ModelOne.SubModelOne(someVar: 2, otherVar: 1)) } } I

问题 I’m really new to c and c++ I tried to experiment with structs to create a list-like structure that can contain float and lists, basically. This code compiles, but it behaves differently depending on the compiler: with the latest version of visual studio community, it outputs 5 and then 0 . with an online shell, I get 5 and then 5 The one I would want to get is the second one when the vector gets passed through the function. here is the code: #include <iostream> #include <vector> using

问题 I’m really new to c and c++ I tried to experiment with structs to create a list-like structure that can contain float and lists, basically. This code compiles, but it behaves differently depending on the compiler: with the latest version of visual studio community, it outputs 5 and then 0 . with an online shell, I get 5 and then 5 The one I would want to get is the second one when the vector gets passed through the function. here is the code: #include <iostream> #include <vector> using

问题 This question already has answers here : why struct arrays comparing has different result (1 answer) Addresses of slices of empty structs (2 answers) Closed 14 days ago . Here is my code: package main import ( "fmt" ) type A struct{} func main() { var ad, bd A res1 := &ad == &bd res2 := ad == bd fmt.Println(res1, res2)// true true fmt.Printf("%p, %p\n", &ad, &bd) // 0x57bb60, 0x57bb60 } Now if I comment the last line of main function like this: package main import ( "fmt" ) type A struct{}

问题 I have to do some kind of work here. My task is to write words from file to a struct in alphabetical order. I thought "hmmmm.. that's easy", but not - it isn't. Or just I f*cked it up :( Can you guys tell me how should I alphabetically add words to my list using these 3 functions? Or maybe it is other way to do this? I share most of my code. struct Word { char* word; struct Word* pNext; }; typedef struct Word Word; bool IsLegitWord(char* word){ int word_length = strlen(word); int i = 0; for(i

问题 is it possible in golang extend struct (something like extend a class in other languages, and use it with functions for old one) I have https://github.com/xanzy/go-gitlab/blob/master/services.go#L287 type SetSlackServiceOptions package gitlab // SetSlackServiceOptions struct type SetSlackServiceOptions struct { WebHook *string `url:"webhook,omitempty" json:"webhook,omitempty" ` Username *string `url:"username,omitempty" json:"username,omitempty" ` Channel *string `url:"channel,omitempty" json

问题 I have 2 different sized structs and I would like to have one function in which I can pass them into. However, I do not know how to define the parameter of the function to accept 2 different structs. My structs are below struct { int a; // 2 byte int b; // 2 byte int c; // 2 byte int d; // 2 byte } person1; // 8 bytes struct { int a; // 2 byte DeviceAddress b; // 8 bytes int c // 2 bytes float d; // 4 bytes } person2; // 16 bytes function print_struct(struct& ?????) { actions here.... } print

问题 I have this code: #include<stdio.h> #include<stdlib.h> struct node { int data; struct node *next; }; void pointerOfPointer(struct node **reference) { struct node *temporary = malloc(sizeof(struct node)); temporary->data = 100; temporary->next = 0; printf("before: temporary->data %d\n", temporary->data); temporary = *reference; printf("after: temporary->data %d\n", temporary->data); } int main() { struct node *linkedlist = malloc(sizeof(struct node)); linkedlist->data = 15; linkedlist->next =

问题 I'm trying to make default value for my struct. For example default value for Int - 0, for DateTime - 1/1/0001 12:00:00 AM. As known we can't define parameterless constructor in structure. struct Test { int num; string str; } class Program { static void Main(string[] args) { Console.WriteLine(default(Test)); // shows namespace and name of struct test.Test Console.WriteLine(new Test()); // same Console.ReadKey(true); } } How can I make a default value for struct? 回答1: You can't. Structures are