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

The understanding of the code. C++
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)...
Sep 21, 2021 at 2:39pm
[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...
Sep 21, 2021 at 8:58am
[6 replies] Last: the only issue i have with that code is if i enter a magic square nu... (by seeplus)
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...
Sep 20, 2021 at 10:37pm
[2 replies] Last: [quote=lastchance]For goodness' sake stop cross-posting. Well, the th... (by deleted account xyzzy)
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...
Sep 20, 2021 at 4:01pm
[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...
Sep 20, 2021 at 1:42pm
[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...
Sep 20, 2021 at 1:41pm
[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...
Sep 20, 2021 at 11:06am
[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 ...
Sep 20, 2021 at 9:58am
[2 replies] Last: Use the prime number theorem to generate an upper bound on the nth pri... (by JLBorges)
Why am I getting inf for my output?
.
Sep 19, 2021 at 10:09am
[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...
Sep 19, 2021 at 1:49am
[5 replies] Last: Nothing wrong with your solution. Points off for: Dinking with std::c... (by Duthomhas)
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...
Sep 19, 2021 at 1:16am
[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...
Sep 18, 2021 at 8:15pm
[3 replies] Last: it is perfectly *safe* to add () to RPN with a dumb algorithm that put... (by jonnin)
Finding discount
#include <iostream> using namespace std; int main() { int quantity; int price; cout<<"Enter the quantity:"; cin>>qunatity; cou...
Sep 18, 2021 at 12:14pm
[3 replies] Last: int is for integers 90 is an integer literal operations between in... (by ne555)
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; ...
Sep 18, 2021 at 9:30am
[no replies]
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...
Sep 18, 2021 at 7:14am
[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...
Sep 17, 2021 at 3:15pm
[4 replies] Last: what is a point, in the above? matrix 1,2,3 all ? I think you need a... (by jonnin)
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...
Sep 17, 2021 at 12:26pm
[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...
Sep 17, 2021 at 3:49am
[2 replies] Last: thanks man! freeaddrinfo() <--- (by volang)
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 ...
Sep 17, 2021 at 3:41am
[4 replies] Last: The Word::getWord() declared in Word.h is const, but the one defined i... (by helios)
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...
Sep 17, 2021 at 2:07am
[1 reply] : You've made a start, that;s good. You need to ask for the number of p... (by kbw)
September 2021 Pages: 123456
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