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Beginners - May 2022 (Page 3)

Can you create an instance of a class using a variable?

Duplicate of http://www.cplusplus.com/forum/general/283588/

[no replies]

Creating Class Objects and Pushing Back to a Vector

Here I wrote some wrong code to tell my problem. I want to create a class object and at the same time, I want it to be pushed back into the vector. As a beginne...

[4 replies] Last: For JLBorges, thanks for your kind suggestions. I still don't know abo... (by bydrachen)

by jaffe15

Is it normal that smart pointers can't solve a problem?

Hi! I was wondering how normal it is that a problem can't be solved with smart pointers? On my current project I can't seem to use smart pointers (which I am a...

[4 replies] Last: A better question might be: "Is it normal that pointers can't solve a ... (by deleted account xyzzy)

by bydrachen

A beginner's class and assignment. May a little bit help?

Hi! Currently, I'm learning C++ classes and object oriented programming. It's hard for me to learn because this is my first language. I have an assignment and I...

[3 replies] Last: Thanks for your kind suggestions jonnin and seeplus. I tried to apply ... (by bydrachen)

by blackpanther35

Writing a function

Write a function, computePrice that receives two parameters: the first one is a character variable indicating the size of the pizza (S, M or L) and the second a...

[2 replies] Last: thanks , So I was kinda on the right track at the beginning (by blackpanther35)

by studentUser23

NumDays Class

Essentially I was creating a class called NumDays where I convert the number of hours into a day since the problem stated there are 8 hours in a day. So I ...

[4 replies] Last: The pre-inc/dec operators are still not as expected by convention. pre... (by seeplus)

by BigNibs

issue with a loop and maybe sentinel?

My instructions were to make the program run until a sentinel was entered, in this case my sentinel was any negative number, however I want the program to imdei...

[11 replies] Last: It's easier if you make input as a function: #include <iostream> i... (by seeplus)

by kingsy

Newbie - Tips needed

Hi, I am new here. Just started learning C++ out of interest. All helpful tips to succeed in this journey will be highly appreciated. Best.

[4 replies] Last: Thank you seeplus. That was really insightfuil. (by kingsy)

by satsat111

Find the right root

Hello everyone, may I ask that given size, nodes and edges of a tree. How can I find the correct node to be the root so that the maximal number of nodes in subt...

[14 replies] Last: Greetings, thank you for your help, solved now. (by satsat111)

by plastic

Segmentation fault in code

Good morning. I'm new to programming and need some help. I'm getting segmentation fault in the if statement with the following code. void delete_car(car_da...

[14 replies] Last: keskiverto thank you for your help, but the code is now fixed. I corre... (by plastic)

by dsimp21

C++ Oscillator not confirming finding sound source or emitting wave

I'm trying to follow along in a tutorial of how to code to an oscillator on youtube. Idk if I can link the video without breaking rules here. I am using codel...

[3 replies] Last: A meta-search link might be helpful to find easier to use ideas. http... (by deleted account xyzzy)

by agirideep

Outputting each instance value.

Hello I have a problem outputting each value for the getIndvCost() function and I wanted to see if anyone knew how to output them using pointers. //John...

[6 replies] Last: There is more than two valid syntaxes, are there? (* ptr ). addPrice... (by keskiverto)

by RandomnessRamen

Calculate Average

Complete the CalcAverage() function that has an integer vector parameter and returns the average value of the elements in the vector as a double. Ex: If the ...

[9 replies] Last: I think it depends how many numbers you have and how big those can get... (by kigar64551)

by satsat111

Weighted graph

Hello everyone, I got problem putting the weights of each child's and getting the max weighted child among them in the code. Some said that this should be solve...

[4 replies] Last: Hello, actually I discussed with my friend and a friend of mine gave m... (by satsat111)

by utredgodless

Displaying data from file

So i have a dat. file that holds 500+ user data information. I want to be able to sort the data into arrays and display it if the user selects that option. ...

[12 replies] Last: And, in that vein, here is a solution looking for a problem using tupl... (by againtry)

by blackpanther35

How do I loop this?

I have to use a function getData aswell as displayOutput and make a for loop so so that it can loop 5 times. Heres What I got so far #include <iostream...

[9 replies] Last: Notice the detail: if (volume < 100) { std::cout << "Size: small\n... (by keskiverto)

by CodeChaser

list<T> within a template ?

#include <iostream> #include <list> using namespace std; template <typename T> void DisplayContents(const T& inList) { //list<T>::const_iterator ele...

[6 replies] Last: > I know what the rest does, but still trying to figure out what.... >... (by JLBorges)

by Anonomys

Find Lowest and Deduct

Write a program that calculates the average of a group of test scores, where the lowest score in the group is dropped. For example: if the user enters the value...

[3 replies] Last: I have corrected it , it works now! (by Anonomys)

by jNc

Write your question here. string path = "man.png"; Mat img = imread(path); Mat matrix, imgWarp2; std::vector<std::vector<cv::Point> > conto...

[3 replies] Last: solved, thank you (by jNc)

by Pen72

Euler order

Good morning, I'm trying to write a program to print the Euler Tour order on a tree. But the code isn't successful, is there any problem regarding the way I inp...

[12 replies] Last: Hello, thanks a lot for the great help!Passed all cases now. (by Pen72)

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