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Beginners - July 2019 (Page 2)

Hi guys, I am planning use boost or Qt library. Not both in one compilation but both in one repository: C++ files will categorized: 1. Files related to boost...

[8 replies] Last: [quote=Niccolo]Anyone notice that @levithanh425 hasn't participated in... (by Duthomhas)

by oyehoye6906

Word Break

Given a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such possible...

[10 replies] Last: dhayden + 1 Memoization is important in this kind of problem. Afte... (by Duthomhas)

by lll

How I put in a 2D array data from a file?

Greetings. I want to put the data from a file of 10 rows with 5 data each row in an 2D array of the same size (30X15) but I don't know how, I would appreciate a...

[8 replies] Last: A “segmentation fault” is the OS’s way of informing you that you... (by Duthomhas)

by Cjigsaw

case switch

I'm working on an assignment and I was wondering if you can call functions in case switches? Maybe a dumb questions forgive me. I have a question about overload...

[16 replies] Last: I think you are overthinking this. Yes, post your instructions and we... (by Duthomhas)

by just4444

{} after initialized variable

Write your question here. new to learning and want to understand what is the {} for after billTotal for? without it "billTotal" in the billTotal = billtotal ...

[4 replies] Last: Admittedly, one of C’s (and especially C++’s) weaknesses is the co... (by Duthomhas)

by dkm04

Reading a config file into 2d array

I have a external config.txt file containing the following information. [0, 0]-41 [0, 1]-93 [0, 2]-90 [0, 3]-24 [0, 4]-70 [0, 5]-39 [0, 6]-47 [0, ...

[2 replies] Last: @dutch thank you very much, you save my day! I have been trying to sea... (by dkm04)

by Xanadu4ever

C++ Embedded systems learning

Hello all, Going to try looking at using Modern C++ with embedded systems and wondered if anyone here recommended a(any) good book(s)on the topic or on-line ...

[5 replies] Last: Thank you gentlemen, RJ, I will go to that site and check it out. My... (by Xanadu4ever)

by jsmithplus

Displaying Unicode characters on Windows, Mac and Linux?

If I use setlocale (see below) in the main function, it works alright taking and storing the user input and displaying it again, characters like "ů". The pr...

[5 replies] Last: When I instead use setlocale(LC_ALL, "utf-8") some characters are st... (by jsmithplus)

by jefazo92

How to use Scroll Area in Qt to print a QString array

Hi everyone, I am trying to understand how to use "Scroll Area" in "Containers" of Qt when designing GUIs. In my case, I have a display function which displa...

[1 reply] : QScrollArea is a "widget", not a "container". I suppose it's kind of a... (by dutch)

by jjordan33

String ordering is working, but also not.

Hi, I'm working on sorting a string of digits 1 - 5 until it equals 12345, one swap at a time, then printing the string after each swap. The swap I want is su...

[13 replies] Last: ohhhhhhhhh. Thank you. ** edit ** I touched up my code to let it ru... (by jjordan33)

by libi

Splitting words from string into vector

Was just trying to do a simple challenge problem and can't figure out why this doesn't work?? Splitting a string into a vector based on ascii value to separate ...

[2 replies] Last: @dutch ohhh yes you are absolutely right. Thank you. (by libi)

by adrianno86

How to handle the 'C2678 binary '<' no operator found' error"

Hi Everyone, I'm trying to figure out a way to solve the C2678 error in my code. I'm using a map, which stores an object as the key and a vector of objects a...

[2 replies] Last: I found out, that I should either define the operator< or overload i... (by Ganado)

by Keked10

Object Class in C++

I need help on how to run code with (#include "Rectangle.h") in Dev-C++ IDE. Every time I try to run the code below with Dev-C++ or online GDB, I keep getting c...

[7 replies] Last: 1) Do you know what directory your Rectangle.h file is currently in? ... (by MikeyBoy)

by highwayman

Using namespace std (1,2)

We all know how to use it, but how does one stop using it? using namespace std; int main(){ cout << "blah"; //stop using namespace std; howeve...

[24 replies] Last: I prefer, over namespace, but sometimes std, and definitely typedef. ... (by Shibitto)

by HEAden

Why is the name of the files affecting the structs in C++?

Using the below code: //h.cpp #include "main.h" #include "api/core.hpp" extern pros::Motor frontLeft; extern pros::Motor rearLeft; extern pros::Motor f...

[17 replies] Last: Here is the solution: Motor_Group& leftDrive() { static Motor_Gro... (by HEAden)

by grumblesnake

Trouble with lexicographical sorting in doubly-linked-list

I'm currently working my way through Programming, Principles and Practice Using C++. I'm in chapter 17, which is basically an introduction to pointers and memor...

[4 replies] Last: @Niccolo, I think I just made the mistake of not really thinking it th... (by grumblesnake)

by joeboat

Best value in array

quick question, how do i get the best score, for example, after inputting 5 scores of 20, 40, 60, 80, 100, it tells me the best score is 100, before calculation...

[12 replies] Last: Isn't working That is not a sufficient description of a problem. In... (by keskiverto)

by Xanadu4ever

Actual real FLTK problem now. (1,2,3)

After my recent exploits... with getting FLTK (v 1.1.10) installed successfully... I think I've actually run into a real problem now. The book instructs us t...

[43 replies] Last: Niccolo, You are a great help man. A real mentor after the type Stro... (by Xanadu4ever)

by scooter28

C++ Using output file help

Okay, so I am asked to output something like this: The 10 random numbers are: 44 61 98 45 45 17 63 24 9 95 The average is 50.10. There are 4 numbers ab...

[14 replies] Last: So it runs now, is this the right way to do this with an array? #in... (by scooter28)

by newbcoding

Number Array Class get highest function

Hello, I'm attempting to brush up on my C++ and am having issues with this program challenge. Everything was going good, but then I started having issues with m...

[4 replies] Last: Ah! I see what you're saying now. Thanks so much for clarifying that f... (by newbcoding)

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