C++

Forum

General C++ Programming - March 2020 (Page 2)

References and Reverse Iteration over map

Hullo, I had a simple question. I surfed through the internet and came upon this solution for reverse iterating a map: for (auto it = map.rbegin(); it != map...

[2 replies] Last: Thanks for the clarification! (by hassanAman)

by jfernbacher

C++ where to begin?

I have a fairly involved question about how to start writing a c++ program, I know how to use different things in c++ but I don't know how to put it all togethe...

[9 replies] Last: well, what I was trying to say was, for substring searching you want t... (by jonnin)

by staycoding12

file input and output

hello i am working on demonstrating input and output of files. I am getting an error prompt when attempting to run the attached code, without it showing any err...

[1 reply] : I am getting an error prompt And the error prompt is? We can't see ... (by deleted account xyzzy)

by Cjigsaw

function advice

Hey everyone, So I made a 2d array. I have to find the lowest, highest, and average. Which I got that, but didn't really did it efficient in my opinion. I d...

[2 replies] Last: Efficiency aside, why is the array 2D if the dimensions of the array a... (by Ganado)

by ahmad alghadban

strings hashing

I am trying to check a substring if it's exist in another string using string hashing. This is my code. #include <bits/stdc++.h> #define m 1000000007 #defi...

[4 replies] Last: learner2 Maybe :) thank you (by ahmad alghadban)

by rainyday

Output all prime numbers between 1 and 100

Hi there, I just got and assignment asking me to write a program that outputs all the prime numbers between 1 and 100. The only main requirement is that I have ...

[8 replies] Last: Ah okay. I forgot that 1 isn't actually a prime number. As for changin... (by rainyday)

by Utku

SFML my move function is not working correctly

In my SFML application, my own move function does not work properly. If I write the move function's code directly to the main function, it works correctly. My ...

[2 replies] Last: @coder777 Thank you for your reply. I change my function according to ... (by Utku)

by CP1 B1 GH1 432

add each line from a text file into a vector

ok so basically i have a .txt file which is formatted like this thing1 thing2 thing3 thing4 etc. and i have a vector. i want to take every line of t...

[1 reply] : Line 6: Do not loop on (! stream.eof()) or (stream.good()). This does ... (by AbstractionAnon)

by broseeph

Checking for duplicate values in 2D array

Hi, I need help on checking duplicate values on a user input 2D array. I have this code so far and I am stuck on how to move on forward. What I want it to do:...

[4 replies] Last: for the approach I said, if you defined suits 0-3 and cards 1-13 (ace,... (by jonnin)

by julie2019

OpenToonz

Almost four years have passed since the PVS-Studio team checked the OpenToonz source code. This project is a very powerful tool for creating two-dimensional ani...

[1 reply] : The slow gradual slide into off-topic-spammery continues. Post it in t... (by salem c)

by Sid321

Arrays and Function Overloading Sort

I have no idea where to start with this one?!!! 1. Create a main function in a main.cpp file. The main function should look as follows int main() {return 0;...

[2 replies] Last: Technically, in the instructions #2 and #3 are the same thing. To go ... (by doug4)

by NadH

Call to a C++ Dll function : SLOW

Hi, I have created a function F1 in a C++ DLL among many other functions. When executed simply from another C++ program, F1 runs normally with logical dur...

[16 replies] Last: I will try a few stuff as you suggested and get back asap. Thank you a... (by NadH)

by DeeMoo

How to create a file with imputed file name?

I need to create a file with custom file name. Person has to imput the files name and then it is checked if it exists or not. After that it gives a response. T...

[2 replies] Last: Thank you very much :) (by DeeMoo)

by DerekCresswell

sprintf format for date::year_month_day

I'm getting this warning on my program : ``` OC/HelpOC.cpp:711:43: warning: format '%d' expects argument of type 'int', but argument 3 has type 'date::year_...

[3 replies] Last: You can tell the compiler to stop complaining by casting that value to... (by kbw)

by raganja

Need Help

In my project, I am taking the surface area and turning that into dollars and cents. For example Total surface area to be painted: 74691.87095 square inches...

[2 replies] Last: Try say int cents = Area / 10; int dollars = cents / 100; cents = cent... (by salem c)

by kitcats

Horizontal Histogram

Hi all, I am writing a program which takes in an ArrayList of numbers to create a horizontal histogram of the numbers' frequency. The first two numbers typ...

[2 replies] Last: Oh, I didn't catch that! Thank you, I will update that and check my ar... (by kitcats)

by rainyday

Deficient, Perfect, Abundant

Hi there, my professor just assigned us a new assignment to write a algorithm that determines whether or not a number is deficient, perfect or abundant. A numbe...

[11 replies] Last: Good job! You can make this even better by simply moving the declarat... (by dhayden)

by Iamme1

Resource file

I need help on a simple program. I wrote a program that solves the mean and variance of some amount of float numbers. I want to try new thing making the main pr...

[1 reply] : #include <fstream> //to work with files int main(){ std::ifstream... (by ne555)

by sluzfinest

Try to set a while statement with a loop and a break

#include <iostream> #include <iomanip> #include <Windows.h> using namespace std; int main() { double hrsWorked = 0.0; double rate = 0.0; double overtime = ...

[1 reply] : Is there a question? (by helios)

by AspiringProgrammer85

Executing Dynamic Objects Member Functions - But they don't exist yet

Hello. First of all, I just want to say, thank you for taking the time to read this. I've been having a hard time figuring this particular thing out, and I ha...

[5 replies] Last: use vectors. your pointer = null and memory later is fine. but vect... (by jonnin)

March 2020 Pages: 123 4... 7

Archived months: [feb2020] [apr2020]

This is an archived page. To post a new message, go to the current page.