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Beginners - February 2020 (Page 6)

dirent

Hi, I am using <dirent.h> to get access to pictures in a folder and get their size. This code runs, but the outcome states that all the pictures contained a...

[16 replies] Last: please refer to my newer thread (by denbja9)

by mpg

Asymptotic complexity: Dichotomous research

Sorry in class (I'm in high school) the professor explained this about the asymptotic complexity: Linear search: "classic" search of an element in a vector...

[5 replies] Last: are you asking about the notation and how to read/write it, or how to ... (by jonnin)

by brim4

How to print words that don't exist in both of my arrays

I have two arrays one is called word which contains 3 words lab, mat and can. The second is an array called line which contains the characters labfromcabcan I...

[7 replies] Last: Thanks Wail that seems to have worked. I do wonder if there's a way to... (by brim4)

by Volapiik

issue with using aliases: syntax error: missing ';' before '*'

I have two classes unsorted.h and a child class Appointment.h. They Should take input in the form: 1/23/1999 Coffee I want to use Appointment as ItemType bu...

[2 replies] Last: The assignment description wants the appointment class to be aliased a... (by Volapiik)

by denbja9

type

in python, if let' say I want to obtain the type of a variable, I simply write as an example: a=10 print(type(a)) output= int Is there a way to do this for ...

[6 replies] Last: In your code block, which would be the name of the file? If you are u... (by Ganado)

by sindhu05

Time Complexity of O(n/e^n) - Where does it lie?

Following is the order of few complexities.. 1/n < 1 < logn < √n, n < nlogn < n^2 < n^3 < ..... < 2^n < 3^n < n^n My question is, where do the f...

[2 replies] Last: what kind of problem has e based complexity? I don't recall seeing an... (by jonnin)

by moe 6734

Blackjack 40

I'm creating a blackjack 40 game for my class. The code should output "BLACKJACK!" only once at the start if the player hits 40. The player will win 20$ once th...

[4 replies] Last: http://www.cplusplus.com/forum/beginner/268170/ (by againtry)

by goshko2

Need a little help or explaining

Here's the part of the condition: To create an abstract class C Digit: Not public member variable "digit" Features: -for reading -to record Output Functio...

[1 reply] : There are a lot of problems. Too many to mention them all. Here is the... (by coder777)

by newbieg

Forward Declaration is !(a lie)

I'm playing around with building my own compiler, obviously just a learning exercise. This means I am viewing the assembly output of gcc -S Now read the tit...

[11 replies] Last: OMG Ganado, That is quite the list! YES!!! Thank you, these are perfec... (by newbieg)

by vbourbeau

Circular reference

Hi, I don't know how to avoid circular reference. Classe B need a object of class C and C one of B? #include B.h Class A { } #include C.h Clas...

[5 replies] Last: You want to create object of type C. It has one B object inside. That ... (by keskiverto)

by vbourbeau

Use variable form chils class

Hi, I'm new in c++. I want to use a public variable form the parent class but I'v got always the error Expression must be a modifiable value class Shape...

[2 replies] Last: thank you (by vbourbeau)

by zzzbluebb

Computing pi in a function and returning it to main function

I am constantly getting an error message that says -> (error: implicit conversion from '_Complex int' to 'int' is not permitted in C++) i don't know how to fix ...

[5 replies] Last: I'm afraid this is one reason why I dislike these online systems for h... (by lastchance)

by Depressed

isDigit error

My isDigit automatically detects that an integer is a letter. I want to make it where it works perfectly and prompts an error message when a letter is inputted...

[7 replies] Last: Out of the 3 the Flying Nun wins - who says there was any competition ... (by againtry)

by wirelesskill

Generate a list of characters based on pre-defined values

Hi, Hoping someone can help me out. I am trying to create a basic little program that will generate a list of values from a pre-defined list of acceptable c...

[4 replies] Last: wirelesskill, did you mean for your second if to not be an else-if? (by Ganado)

by bsmith

Classes

I am new to classes and I'm having trouble figuring out to to create the constructors for them. Below is my class, and after that is my copy constructor (I ...

[5 replies] Last: Is there something in this code that may cause that? xstring & xstri... (by keskiverto)

by elgato69

Debug Error! abort() has been called

Hi everyone, I was making a kind of bank application just to get some practice in, and I've come upon an error i haven't been able to solve by googling or exper...

[8 replies] Last: I added an if statement to catch if n is out of bounds and it works as... (by elgato69)

by MyOnlinePersona

Creating a graph

Hello, I must create one graph. I have not used graph before so I am unsure how to do this. I have all the data stored, first the vertex names in a vector, and ...

[3 replies] Last: https://www.geeksforgeeks.org/graph-data-structure-and-algorithms/ (by lastchance)

by StrangerThings

Output file has no information

"Write a program that will create userids for email addresses of a company. Names of employees will be contained in a file. Your task is to read the file charac...

[4 replies] Last: @jlb, Point taken thank you, Andy (by Handy Andy)

by George P

I wanted to start programming

https://www.learncpp.com/

[6 replies] Last: The OP was unpersoned rather abruptly, apparently. So us lunatics dec... (by George P)

by PankajAhuja

Sort vs stable_sort and comparators.

I have an input vector of vectors as I use sort with a comparator function as: vector<vector<int> > numbers = {{3,3,4},{2,1,2},{2,2,8},{2,3,4},{5,5,6},{1,2,1}...

[8 replies] Last: Correct. Since the comparison function doesn't meet the requirements f... (by helios)

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