your textwhen i traverse through queue and print elements, after the traversal size of queue is zero, but queue.back() is printing the last value, can you help me. Code s.back() should print zero but it is printing 30. >Solution : A C++ program that compiles and seems to run is not necessarily a correct program.… Read More queue.back() always has some value even after popping all elements of queue why?
#include<stdio.h> #include<string.h> #include<stdlib.h> #define max 100 int enqueue(); int dequeue(); int peek(); int main() { char name[max][80], data[80]; int front = 0; int rear = 0; int value; int ch; printf("——————————\n"); printf("\tMenu"); printf("\n——————————"); printf("\n [1] ENQUEUE"); printf("\n [2] DEQUEUE"); printf("\n [3] PEEK"); printf("\n [4] DISPLAY"); printf("\n——————————\n"); while(1) { printf("Choice : "); scanf("%d", &ch); switch(ch) {… Read More Dequeue function is not working correctly
So I’m making a queue list and I’m trying to get rid of memory leaks and uninitialised values. But when running with valgrind I keep getting Conditional jump or move depends on uninitialised value(s). I tried to debug the code and find the error but I can’t. Here is the code I’m running: #include <fstream>… Read More Can't find uninitialised value (valgrind)
I’m trying to create a thread-safe queue of Bytes – One thread receives data from a serial port and puts it into a queue, then the main thread reads the data form the queue and acts on it. Microsoft’s .Net documentation suggests using Queue.Synchronized(), however this doesn’t seem to work for a Queue(Of T). Trying… Read More How to get a synchronized Queue(Of T) in visual basic
I have a linked list that contains a pointer to the first and last node and size which indicates how many nodes are there in the list. I have a function that returns the first node. I want to be able to change the m_data in the first node using queue1.front() = 3;. However, I… Read More a value of type "int" cannot be assigned to an entity of type "Node<int> *"C/C++(513)
The following data exists in the database: [ { "_id": { "$oid": "628c787de53612aad30021ab" }, "ticker": "EURUSD", "dtyyyymmdd": "20030505", "time": "030000", "open": "1.12161", "high": "1.12209", "low": "1.12161", "close": "1.12209", "vol": "561", "id": 1 }, { "_id": { "$oid": "628c787de53612aad30021ac" }, "ticker": "EURUSD", "dtyyyymmdd": "20030505", "time": "030100", "open": "1.12206", "high": "1.1225", "low": "1.12206", "close": "1.1225", "vol": "1223",… Read More Unable to retrieve multiple values from database
I’ve got a query that selects all indexes from a table and generate an output text to drop them individually. I want to put the DB_NAME() info in the beginning of command for once, but at this moment the data is showed at every index drop. I’ve tried to put a select before, but without… Read More Force the output query to shows the DB_NAME() data once
I was using the code from the following site https://www.hackingwithswift.com/example-code/media/how-to-scan-a-qr-code The code works perfectly, the code can be viewed by accessing the link above. It was a code that capture a QRCode/BarCode from camera and convert it to string. The part of the the code that shows the string is: func found(code: String) { print(code)… Read More How to made a UIViewController class reusable to pass data back to a viewController that calls it
I have a little issue, I’m fetching data from Firebase, from Firestore database, but the view is only updated when I’m selecting one of the category. The view has 4 categories which can contains items. I’ll post a short video at the end of this questions to make it clear what’s my problem. So, this… Read More The view is not updated with data from Firestore in SwiftUI
I am trying to solve Leetcode #347 Top K Frequent elements using a priority queue. However, my code is failing some test cases. Here is the code: from queue import PriorityQueue class Solution: def topKFrequent(self, nums: List[int], k: int) -> List[int]: counts = {} mynums = set() q = PriorityQueue() for num in nums: if… Read More Python priority queue- subsequent pops return wrong values after first pop?