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Beginners - April 2020 (Page 10)

Why is it not printing out the right values? I'm lost. Need help. Thanks. #include <iostream> #include <cstdlib> class cs234 { public: templ...

[2 replies] Last: In push_back you write the value to the wrong location in the array an... (by Peter87)

by DdavidDLT

Need some quick help, would appreciate

Hello guys, I have problem printing what I just inputted from line 26th. When I try cout in line 48th I don't get the same results. I should get when I cout : ...

[7 replies] Last: Since original data are too secret to be shared, let’s venture funny... (by Enoizat)

by adam2016

Compiler defines and reading the standard library code?

Hi guys, So a two part question here, First off I noticed a lot of C++ code and C code for that matter have strange defines like #ifndef, #ifdef, #define ...

[5 replies] Last: [quote=adam2016]std::vector and other containers, they almost look cry... (by Cubbi)

by pkdir

Return enum with most occurrences

If I have an array of structs that contain an enum of type Fruit , how can I write a function using modern practices/features to return the type of Fruit that ...

[1 reply] : Following the KISS principle I would copy the values into a std::map a... (by thmm)

by Zanza

Undeclared identifier in grading program

I'm trying to add a menu to my previous program as well as make it more modular by turning the screens into functions. I don't know where I am going wrong to...

[3 replies] Last: This is your code after having removing all the unused declarations an... (by Enoizat)

by hbcpp

Simulated environment for performance

I know that C++ is the language of choice when performance is critical, when speed is a must. That's why it is used in many bank systems, embedded devices, and ...

[1 reply] : About the move vs copy speed comparison have a look at this post on SO... (by thmm)

by Faizts

out put not working return value problem

#include <iostream> #include<cmath> using namespace std; class Calculator{ public: float Addition(float x, float y){ float ans = x + y; ...

[2 replies] Last: i just fix it not add output tag (by Faizts)

by stoneJax

queues

I have a queue which represents people waiting in line at a bank. There is also priority queue who has a list of events which contain arrival times and and tran...

[2 replies] Last: That is correct. cust.transaction_start_time is equal to previous cust... (by stoneJax)

by sparki

C+ delete operator doesn't work properly

Getting an exception thrown error. #include <iostream> #include <vector> using namespace std; class Shape { public: virtual void Draw() = 0; virtual ~Shap...

[1 reply] : The problem is on line 89. You make a shallow copy and both pointers p... (by thmm)

by DJL

Looping and order of operations help

Hello, I am new to C++ and have been working through a bunch of problems for school. Im really stuck on a homework and Im hoping to get some guidance on what I ...

[13 replies] Last: You can always make your own swap like this: double temp = start; s... (by dutch)

by alexko

Colon sign with case and enum

Hello. I tried to find an answer and all of them in the archive, but they didn't explain my example. Or maybe I didn't get it. int calc_mode=(int)SymbolI...

[6 replies] Last: https://www.learncpp.com/cpp-tutorial/53-switch-statements/ (by deleted account xyzzy)

by KittyIchigo1

How to skip over a space when my while loop is supposed to stop at a space.

Hello! I really appreciate how this forum helped me understand my assignment. I have started on it but now I run into a problem and I don't really know how to g...

[1 reply] : else if (c == '@') { while (!stack.empty() && stack.top() == ' '... (by dutch)

by flav32

Creating singly linked list

Is there any way to work with linked lists without writing the CreateList() function every single time? I'm having a really hard time understanding this chapt...

[5 replies] Last: Thank you! I understand the concept, the logic behind them. I could de... (by flav32)

by SubsidingHades

Converting a input string (HH MM SS) to an int (HH:MM:SS)

I have to write a program that takes two different inputs (lets call them FirstTime & SecondTime) and then convert the two times to seconds , get the difference...

[6 replies] Last: You could also use regular expressions <regex> for this, but given tha... (by TheToaster)

by Dustin792

do while loop, invalid user inputs....

Hello, So I am trying to get this loop to take in values and check if they are within my requirements. The input will be invalid if the number of lines(lines...

[3 replies] Last: @TheToaster, I knew i had to reset that and for whatever reason I was ... (by Dustin792)

by Freejay

C++ Joystick

Hello, im kinda new to C++, im making a game and want to use a controller for it, i made also bullets and used a formula for it (so i can shoot 360 degrees arou...

[1 reply] : I guess you start here https://www.sfml-dev.org/documentation/2.5.1/cl... (by salem c)

by closed account EwqDy60M

Classes, objects, points

Hello my friends I have a question that is very important for me i should write this : 1. Write a program that implements the MyPoint point class as follow...

[3 replies] Last: thank u @Handy_Andy i'll do (by closed account EwqDy60M)

by Bkjohnson

Using an array to manipulate Pi to specific decimal Place

I have a class assignment where I have to take pi as a constant and set it to a user desired decimal place. The last digit cannot be rounded so the use of setpr...

[8 replies] Last: It sounds like you're expected to do floor(pi * 10^input) * 10^-input. (by helios)

by jtek679

How to implement classes

Hello, so i am very new to c++ and i have managed to create this code bellow. but i have to use classes to do so. I am very lost how to break this up into class...

[5 replies] Last: Hello jtek679, In addition to what dutch has already said. When yo... (by Handy Andy)

by starhan

Cannot convert int to double

Hello, a beginner currently learning highest values. Been trying to find the highest amount of mushrooms collected in a task, but keep getting this error: ...

[5 replies] Last: Thank you so much!! Both of you are lifesavers! (by starhan)

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