#include <stdio.h> #include <stdlib.h> int main() { struct hash { int pages; int price; }; struct hash *h[2]; h[0] = malloc(sizeof(struct hash)); h[0]->pages = 1; h[0]->price = 2; h[1] = malloc(sizeof(struct hash)); h[1]->pages = 3; h[1]->price = 4; printf(“value = %d\n”, h[0]->pages); } solved Access element of array of pointer of structure
Your query looks like this: “SELECT E.username FROM MyUser E” The E.username part will return a list of username Strings. It should be From MyUser to get MyUser objects. Something like: List<MyUser> p1 =sn.createQuery(“FROM MyUser”).list(); 1 solved java.lang.ClassCastException: java.lang.String cannot be cast to
How should we call a function just once from a function which is called ‘n’ no. of times from the main function without using static variable? [closed] solved How should we call a function just once from a function which is called ‘n’ no. of times from the main function without using static variable? [closed]
The code you posted won’t do anything but pick 3 psuedo-random numbers until the end of time. You have to add some win/loss conditions. As of now the x, y and z are just numbers. If you want to make a gambling game you have to add some victory conditions like: if x + y … Read more
ggplot2 is my favourite R package, so here is how I would solve this: df = data.frame(difficulty = 2 + (runif(200) * 6), ID = rep(c(“point”, “bubble”), each = 100)) df$movement = rep(c(1.2, 1.4), each = 100) * df$difficulty + (runif(200) / 5) library(ggplot2) theme_set(theme_bw()) ggplot(df, aes(x = difficulty, y = movement, color = ID, … Read more
When the realloc function can’t get more memory to expand the block to the size you asked for. This is either because there is literally no memory available, or the virtual space is exhausted (e.g. a 32-bit application on a 64-bit machine with 16GB of RAM still can’t use more than 4GB in the process … Read more
The code you suggested is called builder pattern. Here is how I do builder pattern in my C# codes. Builder class class PersonInfo { private string name, animan, color; private int age, num; private PersonInfo() { } public class Builder { PersonInfo info = new PersonInfo(); public Builder setName(string name) { info.name = name; return … Read more
when to use ??= operator? From MSDN: The null-coalescing assignment operator ??= assigns the value of its right-hand operand to its left-hand operand only if the left-hand operand evaluates to null. For example, int? a = null; … a ??= 5; //Here a is null, so assign 5 to a int b = a ?? … Read more
Just to show you current C++ (C++20) works a bit different then wat most (older) C++ material teaches you. #include <algorithm> #include <iostream> #include <string> #include <ranges> bool is_not_four(const char digit) { return digit != ‘4’; } int main() { // such a big number iwll not fit in any of the integer types // … Read more
Why doesn’t this code use the C++ power function directly? Can someone help me with the power function in this code? [closed] solved Why doesn’t this code use the C++ power function directly? Can someone help me with the power function in this code? [closed]
If you want to access any view, you have view object to access it. public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.frag1,container,false); btn = (Button)view.findViewById(R.id.button); return view; } solved Cannot resolve method ‘findViewById(int)’ in Fragment of ViewPager [duplicate]
CGVectorMake has been deprecated. Use the following syntax to initialise a CGVector: self.physicsWorld.gravity = CGVector(dx: 0, dy: 0) Or, since you want a vector with both components 0: self.physicsWorld.gravity = CGVector.zero solved Swift 4 Change Physics Gravity
int array[size] declares an array of size elements. Outside of a declaration, array[size] access element size in array. It does not resize the array. If you do something like that without changing the value of size, it actually tries to access the element after the last element in the array; not a good idea. In … Read more
Your parent container does not have any height, thats why you don´t see the map. Try to set the height of the div with the id of ‘map’ to some value and you will the see the map #map { height: 200px; } 7 solved Google Map is not showing up [closed]
Thanks for the advices guys. But I found the way on how to do it. I only changed the pickQuestion function. func pickQuestion () { if Questions.count > 0 && questionscount < 8{ QNumber = Int(arc4random_uniform(UInt32(Questions.filter{$0.Question.hasPrefix(“KEK”)}.count))) questionscount += 1 questionLabel.text = Questions.filter{$0.Question.hasPrefix(“KEK”)}[QNumber].Question self.title = “Ερώτηση: \(Int(questionscount))/50” answerNumber = Questions[QNumber].Answer for i in 0..<buttons.count{ buttons[i].setTitle(Questions[QNumber].Answers[i], for: … Read more