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General C++ Programming - April 2020 (Page 9)

Problem to connect Compile Instruction

Dear Community, I have a little Problem to connect Compiler Instructions for g++ on Linux Ubuntu Mint. The Problem is that I can combine not following instructi...

[1 reply] : More info than "it wouldn't work" might be helpful. Try g++ -std=c++1... (by dutch)

by Cjigsaw

cout arrays

Is there a way to cout an array? void displayPrice(double money ) { for(int i = 0; i < 5; i++)//I am making the array 5 elements { ...

[12 replies] Last: #include <iostream> template <typename T, size_t SIZE> std::ostream&... (by deleted account xyzzy)

by wallid soukaki

Help rewriting a 2d array

I need to split up a 2D array into a smaller 2D array, where every other column is rewritten to a new array. so .. Originalarray into Newarray . Im having...

[3 replies] Last: Got it! Thanks! (by wallid soukaki)

by ilikesweets

Using a double linked list in a different class

Format:https://www.geeksforgeeks.org/doubly-linked-list/ I am trying to get more comfortable with data structures, so I'm trying out double linked lists. I hav...

[7 replies] Last: Thank you very much for your help. I appreciate it. (by ilikesweets)

by Cjigsaw

*pointers with arrays

Hello everyone, If you have a pointer that points to an array and you are making a function. You have your for loop and counter, etc. How does one use the p...

[13 replies] Last: Hopefully, your array is not called "array", since this is a keyword. ... (by zapshe)

by am250478

Different outputs using URLDownloadToFile

Hi, first time here, new programmer. I am trying to download online html pages and then search after specific strings. I implemented code with URLDownloadToF...

[3 replies] Last: Sometimes the html is generated by JS, which the browser executes but ... (by thmm)

by scorp08

Primitive geometry and mesh generation in C++

Hello All What I trying to do is , generating some primitive 2d shapes and show in the gui with dimensions which is important. Then I would like to generate 2d...

[3 replies] Last: Oh, I see. I'm not sure of a suite of programming tools for FEM. But h... (by Ganado)

by Mactin909

Need Help Sorting Strings From Array By Increasing Length

So for an assignment, I have to mod a selection sort algorithm to sort an array of strings by increasing length. I did some work to the point where I can random...

[6 replies] Last: Integer vs string. You create string B. A copy. That is fine. Let me ... (by keskiverto)

by quakig

void** to float** or double**

Hi I am new to C++. Here's my situation. I have to create an array of array named m2DArray. It has 2 rows and 5 cols i;e a size of . The array can be `flo...

[7 replies] Last: Then at runtime I decide between float** or double** based on some lo... (by Enoizat)

by doug4

Derived Class with Derived Member Object

I want to have a base class that contains a member object. When I extend the base class, I want the member object to be of a type derived from the original typ...

[2 replies] Last: Thanks! That's what I was looking for. (by doug4)

by akash16

Insertion Sort time complexity is O(n) in Best Case

Why Insertion Sort time complexity is O(n) in Best Case? The best case for any sorting algorithm is when input is already in sorted order. Here in such scena...

[no replies]

by akash16

Bubble sort have O(n) time complexity in best-case

Why does Bubble sort have O(n) time complexity in best-case performance? The best case for Bubble Sort Occurs when the given array is sorted array. We will ...

[no replies]

by Toddinator716

Help passing array to main function

#include <iostream> #include <fstream> #include <string> #include<ctime> //for rand and srand #include<cstdlib> //for time function #include<iomanip> //Formatt...

[5 replies] Last: I've managed to workaround this solution with vectors which is probabl... (by Toddinator716)

by sakonpure6

Help me identify algorithm

I am a novice programmer, and I am trying to implement a finite element solution. I think I am trying to solve a common algorithm, but I am not sure what it is ...

[2 replies] Last: My drawing was basically trying to represent a flow chart map. You sta... (by sakonpure6)

by nexteon

How do I implement a variant version of the insert function in an binary search tree?

I am trying to implement the insert function in my bst.template file. I haven't implemented anything important as I am confused on what to do. Here's what I've ...

[3 replies] Last: Why does it matter? And where's your attempt? if(item) is not an att... (by dutch)

by Scarletpimp

Ned help regarding passing object referance

I have a class whose member is another class' object like below class test { A aobj; void testfunc() { aObj.bObj.printval(&aObj); } ...

[3 replies] Last: similar cyclic dependency asked on http://www.cplusplus.com/forum/ge... (by marhuum)

by marhuum

Efficiency and optimization in assignment inside the condition

Is efficiency and optimization in assignment inside the conditional expression quite significant ? How is to pinpoint the real assembly code enhanced efficiency...

[2 replies] Last: It has nothing to do with efficiency. If you remove the semicolon on l... (by Peter87)

by adam2016

Heaps and time complexity

Hi guys, so below I have created a minheap, anyhow from what I have read they say that to poll or get the min element ( or max depending on what type of h...

[11 replies] Last: Is that a kind of "amortized time"? I don't think so. The average cas... (by helios)

by DeeMoo

How to make object movement smoother?

Hi! My problem is that when i move my board (which is the rectangle) it is very choppy. My board will move a little then accelerate to a smooth movement until I...

[1 reply] : see if you can move less far per go, and reduce the sleep. you should... (by jonnin)

by jsanti2519

C++ Riemann Sum Problem

Hello, The code below is supposed to calculate the area under the curve. I managed to get the code to work by setting delta to 1 or even smaller numbers like...

[2 replies] Last: which begs a general point: you don't usually want to compare doubles ... (by jonnin)

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