C++

Forum

Beginners - July 2018 (Page 7)

by platypus1989

C++ beginner here. I am learning dynamic memory allocation recently and trying to compare with vector<> with a small code snippet shown below. #include<io...

Jul 21, 2018 at 11:56am

[2 replies] Last: Thanks Peter! That was a lurking mistake for me :) (by platypus1989)

by closed account 1TD80pDG

can you help me in this question

Jul 21, 2018 at 9:20am

[2 replies] Last: @ipg can you help me with this i think it is Geometric Progression. ... (by closed account 3UohqMoL)

by darkX

Modular multiplicative inverse

please suggest me the most opptised algo (preferably in java) to find the Modular multiplicative inverse i am using this till now:- static int mod...

Jul 21, 2018 at 8:31am

[no replies]

by rjblair87

Count++ not adding to initial count

Hello, I have spent hours on this project and am hoping for some help. I have been trying to get my counts to work but every time I run the program it outputs 0...

Jul 21, 2018 at 4:47am

[1 reply] : #include <iostream> #include <string> #include <fstream> #include <cc... (by JLBorges)

by rodentMinn

Segmentation fault with empty string

I've been in panic recently because I have code that works fine on one computer, but crashes on the server where I submit my code. I have a class called "Perso...

Jul 21, 2018 at 1:58am

[15 replies] Last: Sometimes when people have been reluctant to post code they can find s... (by dhayden)

by clonxy

How to change a dynamic 2d array from another func

I'm trying to create a dynamic 2d array to play chess with only 2 pieces: White King and Black queen. The user inputs the size of the board and then I place t...

Jul 20, 2018 at 8:25pm

[10 replies] Last: I agree, doing a manual 2D->1D indexing (y*width + x) is very nice (it... (by Ganado)

by BGA6444

Incrementing value of variables in an array

Can anyone tell me how I'm supposed to increment in variables that are in arrays? I have tried looking on the internet but they aren't very clear. Also, how am ...

Jul 20, 2018 at 6:28pm

[5 replies] Last: Your problem lies in the fact that you are trying to increment the enu... (by Misenna)

by phztfte1

Cannot Open Source File

In the Main Test File, the statement #include "frac93.hpp" does not work. There is a red squiggly line underneath the #include that indicates the file cannot...

Jul 20, 2018 at 5:19pm

[2 replies] Last: The name of the header file is "frac93.hpp". The name "frac93.hpp" is... (by phztfte1)

by ysf007

How to write o good Comparison operator ?

hi, I'm trying to check if two objects are equal cause I got this error XD binary '==' : no operator found which takes a left-hand operand of type 'Foo' (or t...

Jul 20, 2018 at 4:42pm

[10 replies] Last: If you're looking for efficiency then you might also consider which da... (by dhayden)

by CGunn86

The importance of compile time functions?

What is the importance of evaluating things at compile time? int x = 10; and constexpr int x = 10; Both of these are going to give us an integer dat...

Jul 20, 2018 at 10:59am

[1 reply] : It allows you to use it in places where a compile time constant is req... (by Peter87)

by greenteefanclub

Difficulty with while loop

Hi! I just recently started learning programming and this is my first language and I have no prior experience. I am following the Bjarne Stroustrup Programmi...

Jul 20, 2018 at 12:50am

[3 replies] Last: I didn't check your code 100% but it looks really good. easier to jus... (by jonnin)

by seungyeon

File I/O Comparing numbers.

I have 3 lines in my file. 34532 2323 43242 523 532652 324 4325 5235 235562 If I getline, each I only have 3 cells. If I "infile >>" I will have 9 cell...

Jul 20, 2018 at 12:37am

[3 replies] Last: I'll try to read your code @Ganado. I need to see how I can compare th... (by seungyeon)

by BGA6444

Arrays, tables and void functions... help...

Can anyone figure out how to read the next value from an input file and store it in array table while using a void function that is not letting you do it the ...

Jul 20, 2018 at 12:34am

[1 reply] : void functions can take parameters. void foo(ifstream &ifs) //this i... (by jonnin)

by watted

help with oop exercise (rectangular Matrix)

Hello everybody,i need help in exercise: 1.write a class of rectangular matrix in c++ a.define the operators +,-,+=,-= and the matrix multiplication(includi...

Jul 19, 2018 at 8:44pm

[2 replies] Last: This looks like a lot of fun. Write and you will have fun, too! Br... (by icy1)

by Ch1156

How to create a timer using C++ only and no windows API

I am writing a game similar to the Fallout shelter part where they explore the wasteland. I would like the game to do something every minute like say some dialo...

Jul 19, 2018 at 8:17pm

[12 replies] Last: #include <iostream> #include <vector> #include <string> #include <chr... (by icy1)

by alenasinchuk

C++ Void and cout

Hello everyone, Could you please help me to understand why the program doesn't see the input data? I need it to display the hours and minutes and it shows ...

Jul 19, 2018 at 7:07pm

[8 replies] Last: An example of correct function pass by reference. #include <iostrea... (by Manga)

by phztfte1

Implementation of Comparison Operator

I am reading Object-Oriented Programming In C++ by Nicolai M. Josuttis. In Chapter 4 of the book, he provides a header file but no source file for the header f...

Jul 19, 2018 at 6:15pm

[3 replies] Last: I retyped the test program into another file, and the source file "fra... (by phztfte1)

by Trisha306

Google test in CLion - Unit test function using gmock

bool bank::read1(int duration){ int num_votes = take_vote(&party, leader, duration); if (num_votes > 0){ int count_votes = read(dup, buf...

Jul 19, 2018 at 2:37pm

[4 replies] Last: I think in its current state the function isn't testable since it depe... (by Thomas1965)

by SulPC

Code Optimization

In what ways could the following code be optimized? It's a basic program state function to all function loops based on its state. main.ccp #include <iostream...

Jul 19, 2018 at 1:53pm

[2 replies] Last: even with such a small program I would not use the global. optimiza... (by jonnin)

by Donut

Functional Decomp

Newbie with another question for the experts...I am teaching myself C++ and have spent a fair amount of time reading on this site to help better understand how ...

Jul 19, 2018 at 1:14pm

[1 reply] : you can take the file I/O and remove all of it into a function, and ha... (by jonnin)

July 2018 Pages: 1... 5 678 9... 17

Archived months: [jun2018] [aug2018]

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

Registered users can post in this forum.