C++

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Beginners - December 2018

by Tduck
Can you define two classes on the same source file?
 
I have an issue with a program I am creating that wants to use one object as a parameter. When I had first wrote the program, I ended up with huge errors regar...
[2 replies] Last: You just need a forward declaration for each class: #ifndef CLASS1_H ... (by dhayden)
by Mehmood Umer
Error
 
I don't understand what's happening?? #include<iostream> using namespace std; struct time { int hours; int minutes; int seconds; }time 1 ; voi...
[4 replies] Last: main() While we're here, that's very wrong. main returns an int ... (by Repeater)
by bretjoseph
Is it possible to use a string as a member name?
 
I'm using Gtkmm3 and I have a custom widget CustomWidget . I want to instantiate CutomWidget like so string name = "Account" + std::to_string(m_notebook.ge...
[4 replies] Last: AbstractionAnon I have fixed that in my github page, but still after p... (by bretjoseph)
by imperialcplusplus
Saving a row of a vector into another vector
 
Hello, I am learning c++ and I am currently at halt. I am trying to write a function such that: 1) It takes in input a one dimensional vector and an integer...
[1 reply] : > I starred the parts that are incomplete due to my lack of knowledge.... (by ne555)
by IT Delinquent
FizzBuzz
 
Hi, I normally use the FizzBuzz test and try to see how many different variations I can do to get used to a language when first starting. I've successfully m...
[2 replies] Last: Thank you very much Ganado for your quick response! :) Yep, that was... (by IT Delinquent)
by armando2
Helping out for GamePlay Multiplayer
 
Hello! I have been creating a game for 5 years! Can someone help me out now pls ? https://fundrazr.com/f1RFg6?ref=ab_b7mQAb
[1 reply] : Can someone please help me at least where i can find some help ? Plea... (by armando2)
by nooblike
c++ password storage + masking input
 
Hello everyone, I'm pretty new to programming - just starting out with C++. So I wanted to make an application - just for fun - which would mask user input with...
[1 reply] : Even thought maybe about encrypting data in that file, although I hav... (by helios)
by Spaget
Problem with program
 
Okay so i am stuck in this particular point in my program.So the program goes as follows:A menu of products shows up(the fuction metProPin(t,&pr ) makes it show...
[1 reply] : Line 26 is wrong. Whatever you try to pass to metProPin(...) &pr is... (by coder777)
by FocusedSG
Help with C++ writing to JSON
 
Hi, I'm making a game server and my database is in JSON format. However, I would like to know how do I check if a field exist in the .json file and add in the f...
[2 replies] Last: I would actually recommend boost PropertyTree. See: https://www.boost... (by coder777)
by Mehmood Umer
is program right??
 
i write a program that calculate the sum of first nine terms like(1/3!+5/4!+9/5!+....) i am not sure that is right or wrong... #include<iostream> using name...
[7 replies] Last: Thanks... (by Mehmood Umer)
by yat89
Moving the next value to the left to replace the removed value
 
Hi everyone. I am new to C++ programming. I need some help from anyone here. I got a task to remove two values which is 1 and 2 in 2d array. I had successfully ...
[10 replies] Last: Usually when you compile you can tell your compiler which standard ado... (by Enoizat)
by kakaducsy
Normal variable and pointer
 
Can you explain about bellow code?Why (na+1)=0x4? when a variable store stack or heap ? // Example program #include <iostream> #include <string> int main(...
[1 reply] : It's just an arbitrary value since you never initialized it. Try this:... (by dutch)
by Nooboob
Interview Question that got me confused
 
There was an interview question a while back, which got me confused for a while and at the moment. Create a function such that Every time I call it, it must re...
[11 replies] Last: That's very nice too :) Edit: Grime, There's a few differences betw... (by Ganado)
by imperialcplusplus
Why cant you compare the value if an int type variables
 
Why cant you compare the value if an int type variables? For example: int a = v.size(); for(int i=0; v !=n && i<a; i++){} if(i<a){ return...
[13 replies] Last: @repeater That makes much more sense now I was unaware of this thank ... (by imperialcplusplus)
by veysel
difference static and global variable
 
hello friends, why we using static variables in a class according to global variable ? are they any special reason ?
[2 replies] Last: firstly thank you for the answer. What i understand that using global ... (by veysel)
by bretjoseph
For loop an array in a class which isn't main
 
I am trying to cout strings from an array which I want to use as a name of a widget in gtkmm but right now I just want to output the name, on compile I get th...
[3 replies] Last: Hmm thanks it now works even without the #include <string> ... (by bretjoseph)
by imperialcplusplus
outputting border of a square-nested loops and conditionals
 
I am writing some code such that: 1) you input the length of the side of a square and what you want to repeat 2) it then outputs the border of the square ...
[2 replies] Last: Perhaps if you renamed 'i' to be 'row' and 'j' to be 'col', things wou... (by salem c)
by Brassware
Looking for C++ Mentor, Willing to Mentor in PHP/JavaScript
 
Hello, I've been a web developer for 15 years, I've done pretty much everything with PHP and I'm well versed in Javascript, I'm looking to maybe skill-swap w...
[4 replies] Last: > User name: Brassware > This user does not accept Private Messages I'... (by salem c)
by babydev
undefined reference to `sqlite3_open'
 
I would use sqlite3 db got this snippet #include <stdio.h> #include <sqlite3.h> #include <iostream> int main() { sqlite3 *db; char *zErrMsg = 0; ...
[2 replies] Last: thankyou for your answer unfortunately I'm really quite new to c++ ,... (by babydev)
by imperialcplusplus
Data types
 
I am writing something which could: 1) take a point 2) find distance to origin 3) compare to one before and submit closest one 4) if within 0.01 of origin ...
[3 replies] Last: When a number is used where a boolean value is expected zero will be t... (by Peter87)
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