Beginners - C++ Forum - October 2018 (Page 12)

Counting the number of primes before n

I'm relatively new to c++, and I've been trying to write a code to count the number of primes before an arbitrary number. Can you please help me with my code? I...

[1 reply] : You can't determine that a number is prime until your inner test loop ... (by tpb)

by Brandon17

Expected initializer before '.' token

I'm writing a class with an array and I'm supposed to calculate the average of some entered grades outside the class and in the main but I get the error Expec...

[10 replies] Last: Hello Brandon17, I reworked the "set" function to speed up testing. I... (by Handy Andy)

by zain ahmad

Integer not storing more than 0ne zeros in C++

I want to store more than one zeros in Integer #include <iostream> using namespace std; int main() { int number = 00000000; //number not storing m...

[2 replies] Last: Hi you have to use the bitset not int #include <iostream> #include ... (by saeidsj)

by noobcplusplusprogrammer

Iterated function system (Fractal)

Hello, i am stuck on my last part of assignment it say i need to write a program, named Fractal.cpp that takes a single command-line argument: the iteration le...

[1 reply] : anyone can help me (by noobcplusplusprogrammer)

by Lucky7

Hey, a beginner needs Help

Hey i have been given a task: Given a positive integer n. Find out if n! can be expressed as a sum of three consecutive numbers. Use a function that calculates...

[5 replies] Last: A method to check is to check if the number is equal to 1*2*3. If it's... (by Repeater)

by Satan

Does const have practical applications like reducing memory usage?

Okay so we know that we use the modifier 'const' when a certain variable isn't going to vary along the execution of the program. So from what I know 'const' ...

[4 replies] Last: const helps you to write better code. It actually prevents you from ab... (by coder777)

by zain ahmad

Integer to String conversion

I need alternative of this code #include <string> #include <iostream> # include <sstream> using namespace std; int main() { int input =1999999998; ...

[1 reply] : What kind of alternative? Maybe like that? #include <string> #includ... (by Thomas1965)

by chrichri

Lambda function

Hi everybody , I try to copy data of a vector has an other vector string hello="thelifeisbeautiful"; vector<char>life; life.resize(hel...

[11 replies] Last: @ JLBorges thank's you (by chrichri)

by Mawuena

Am a beginner .

Write your question here. am a beginner here.

[5 replies] Last: Don't you guys see? By not asking a question he isn't limiting himself... (by zapshe)

by Psalazar2016

Need help please!!! I am stuck

Good evening, I have finished my homework assignment, and my code works like a charm (with probably some minor extra unused variables lol) , but I need help cre...

[4 replies] Last: https://www.learncpp.com/cpp-tutorial/82-classes-and-class-members/ ^... (by zapshe)

by poohbear

vectors

can some tell me if im doing vector right as in the private member . im very confused how vectors work #include <iostream> #include <string> using namespace...

[4 replies] Last: @TIM's link says most of what there is to say about this. To phrase i... (by mbozzi)

by rjblair87

help using class in program

Hello, I am working on a project and it seems to work really well but I would like to use a class to write the program. I have watched numerous videos on cla...

[2 replies] Last: Hi Ryan, First up, a tip for future posts: Use code tags - select you... (by TheIdeasMan)

by kmce

Pointers

Hi, I am going through the tutorials on here for some revision, and I am struggling to understand some code relating to pointers. This is the code // more...

[4 replies] Last: I understand now, (Not sure if I just mistyped earlier, or if I did in... (by kmce)

by squiffy123

how do i make a program loop?

How do i get this program to loop, also how to make the text green? Thanks. /*Halloween program(not finished) */ #include<iostream> #include<iomanip> #inclu...

[3 replies] Last: The code: /*Halloween program(not finished) */ #include<iostream>... (by Handy Andy)

by Sevrene

Can't Figure Out How to Write Add Fraction Function

I have to write a function that takes two fraction instances and adds them together. It is not allowed to be a mutation function, and it must be a const member...

[4 replies] Last: When I said you need to take care of zeros in the num /denom and handl... (by TheIdeasMan)

by closed account EAp4z8AR

I need help with input validation using overloaded functions

For some reason I can not get the while loop in the last function to end when it is true. #include <iostream> #include <math.h> #include <iomanip> #include <...

[1 reply] : Hello vmansuria, Sorry I did not see this sooner. You not only have ... (by Handy Andy)

by zain ahmad

Carry Addition Problem in BigIntegers uptp 45 digits in c++

I want to take a carry if number is greater than 99999999 the digit at every index of array must be less than or equal to 99999999 Here is my code # i...

[1 reply] : I think we need more information. For example, in the code you posted,... (by dhayden)

by Niksy50

Average value of some data

Hi, i must calculate arithmetic average value of some data, but when i run my program it doesn't give me any value. float arithmetic_average_value (int b ,in...

[1 reply] : You should try stepping through your code with a debugger, examining t... (by MikeyBoy)

by mondixon

Help with hooks

Hi guys, I'm very new to c++ and i recently came over problem of detecting active window change. I was using simple loop with while(1){} and GetForegroundWindow...

[4 replies] Last: Why are you using MessageBoxA instead of MessageBox It's a good idea... (by Thomas1965)

by nowy20180820

doubly linked list

Write your question here. #include<iostream> #include<ctime> #include<cstdlib> using namespace std; template <class T> class Node { T data;...

[2 replies] Last: I tested your code with at the the online shell and it worked fine, ev... (by nuderobmonkey)

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Beginners - October 2018 (Page 12)