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General C++ Programming - September 2021 (Page 3)

Can you explain me please this code? I understand it in general terms. I need a clear understanding. #define isEven(x) ((x & 0x01) == 0) #define isOdd(x)...

[14 replies] Last: Can it be true? You are just using (the results for) the standard E... (by lastchance)

by Maln18

Help me with this C++ code

I have to do this. These are the instructions. Write a program that queries the user for an odd integer n, where n is a 3, a 5, or a 7. Create a 7x7 static ma...

[6 replies] Last: the only issue i have with that code is if i enter a magic square nu... (by seeplus)

by lastchance

Help me fix my code.

EDIT: This was Maln18 's unnecessary thread originally - he/she is not worth replying to. This is your THIRD thread with precisely the same problem! For g...

[2 replies] Last: [quote=lastchance]For goodness' sake stop cross-posting. Well, the th... (by George P)

by rv11265

C++ App error .dll not found

I am new to C++ programming and I am using Visual Studio 2019 I have a project that uses a dll xerces-c_2_1_0.dll. This dll is in the same directory as the ap...

[6 replies] Last: strange. if you built it on 2 different computers, you can compare th... (by jonnin)

by gadi01

call derived member functions (1,2)

I define a function in base class as virtual and I redefine it in the derived class. When I call this function in func.cpp to use its members, the call fails. I...

[38 replies] Last: This page has a fully worked cpp example. https://coin-or.github.io/I... (by TheIdeasMan)

by shader

Kth stack permutation

A stack permutation of number N is defined as the number of sequences which you can print by doing the following Keep two stacks say A and B. Push numbers f...

[1 reply] : A guess: https://www.researchgate.net/publication/220432014_A_Note_on_... (by keskiverto)

by Denvor

Linked list with templates

can someone please help me with this program?Im so confused i dont even know where to start. My program is a bit complicated.Im suppose to create two classes.Th...

[3 replies] Last: You'll find things easier when you come to code the list if you have: ... (by seeplus)

by Qsh222

Find the first n prime numbers using the sieve of erathostenes

The program is supposed to display the first n prime numbers, where n is inputted by the user. I only managed to work out a really slow solution. Could someone ...

[2 replies] Last: Use the prime number theorem to generate an upper bound on the nth pri... (by JLBorges)

by tyeager

Why am I getting inf for my output?

[5 replies] Last: Perhaps: #include <iostream> #include <cmath> using namespace std; ... (by seeplus)

by Qsh222

GCD of n numbers

The program is supposed to display the GCD of n numbers. I managed to work out the solution, but in only gets 96 / 100 points. Could someone help my oplimize th...

[5 replies] Last: Nothing wrong with your solution. Points off for: Dinking with std::c... (by Duthomhas)

by foxmarine

Word Count

Can someone help me derive a program or to understand how to create a program that counts words? That would be helpful!!! Especially utilizing no vectors onl...

[17 replies] Last: You got a problem with the venerable "goes to" operator? (by Duthomhas)

by Armanc

How to find all possible placements in a stack with using recursive function

I am trying to code a program that finds a target number by using six other integers and four mathematical operations (+, -, *, /). I do not want to use any kin...

[3 replies] Last: it is perfectly *safe* to add () to RPN with a dumb algorithm that put... (by jonnin)

by Zaneemma

Finding discount

#include <iostream> using namespace std; int main() { int quantity; int price; cout<<"Enter the quantity:"; cin>>qunatity; cou...

[3 replies] Last: int is for integers 90 is an integer literal operations between in... (by ne555)

by seeplus

Anyone can help me fix my code?

The matrix is being allocated on the heap as it is defined as static. To allocate on the stack, don't define as static: #include <iostream> using std::cin; ...

[no replies]

by poweruserm

Compatible C++ libraries Questions.

I am trying to construct a cross compatible C++ Libraries platform, and I was wondering if anyone can reply with a set of answers and recommendations. I wish t...

[9 replies] Last: I am trying to assemble a native C++ library set where types immediat... (by helios)

by Cplusc

how to find common elements between different matrices

I have 3 matrices. I want to find the shared elements within these matrices with the number of repetition. matrix 1: 1 2 3 4 5 3 2 1 3 2 1 0 0 2 1 4 mat...

[4 replies] Last: what is a point, in the above? matrix 1,2,3 all ? I think you need a... (by jonnin)

by tanner19

C++ Programming Code This

Hello can anyone help me figure out this C++ programs I don't understand how to do it can anyone program it for me and use comments? Static arrays or static ma...

[5 replies] Last: Something like this: #include <iostream> #include <string> #include... (by seeplus)

by volang

winsock getaddrinfo

Hello. Hope everything is alright! I have a question about winsock getaddrinfo(domain_addr, "43", &hints, &result); After a call to that function, the las...

[2 replies] Last: thanks man! freeaddrinfo() <--- (by volang)

by anonymoususer13579

I am getting an error for no reason

It is saying "Member declaration not found" in Word.cpp, "undefined reference to `WinMain@16'" in Word, and "recipe for target 'Word' failed" in makefile. But ...

[4 replies] Last: The Word::getWord() declared in Word.h is const, but the one defined i... (by helios)

by cbriggs25

Help with a C++ Project

Hi! I am trying to figure out this problem. Write a program that asks a doctor to enter the number of patients that walked into his/her clinic at the end of t...

[1 reply] : You've made a start, that;s good. You need to ask for the number of p... (by kbw)

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