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Beginners - September 2021 (Page 4)

I don't know why this does not run successfully.

My code is to determine weather a person is available by his/her age. 6<=age<=10 means qualified. But no matter what number is input, output always is true. ...

[8 replies] Last: sorry for that, I copy/pasted the bad condition without noting :( (by jonnin)

by audioni

I am losing my mind

This is so basic yet i cant seem to get it and it is frustrating me Basically I need to input the world population and country population, and get what percenta...

[3 replies] Last: #include <iostream> int main() { long long int worldPop {}, countr... (by seeplus)

by jonnin

21312

set up a boolean, eg bool isvalid{true}; //until proven otherwise, the value is valid.. then loop until happy: do isvalid = true; //reset it each loop! read a n...

[3 replies] Last: The question was essentially, "How do I handle user input during an in... (by mbozzi)

by DreamingInsanity

Mismatched file types for std::getline

I'm trying some basic C++ file stuff. I've created a small class with some functions to help read sections from a file. The important function in the class is t...

[7 replies] Last: The default delim for .getline() is '\n' - same as for the standalone ... (by seeplus)

by Milnk

How to add input string at the final output

If my input is 10 4 | - It should print out |----|----|----|----|----|----|----|----|----|----| But my code only prints out |----|----|----|----|----|----...

[14 replies] Last: Yeah - using s for string requires using namespace std::string_literal... (by seeplus)

by closed account Nwb4iNh0

bool function checks and returns if the (sub) trees are completely identical

Im trying to create a bool function : The function checks and returns if the (sub) trees are completely identical. Ie. that both trees have exactly the same str...

[4 replies] Last: the feedback seems picky... the best way to do this seems like setting... (by jonnin)

by nosol6

Dynamic Array Allocating Function

I'm currently in the process of writing up a function that allocates two arrays of 100 integers each using this function. The function has 2 arguments: 1)...

[2 replies] Last: @nosol6 In your first snippet, line 15 works, but would more normally... (by MikeyBoy)

by elle0124

DO WHILE LOOP C++

CAN I ASK FOR YOUR CODE ON THIS, THAT THE OUTPUT MUST BE Enter how may number:5 10 5 100 4 56 Number/s ends with zero: 10 100

[8 replies] Last: #include <iostream> #include <string> using namespace std; int main(... (by lastchance)

by closed account Nwb4iNh0

if two trees are identical

Why we pass two parameters/pointers in bool function when we want to create function to identify if two trees are identical ? and when we call this function in...

[10 replies] Last: You're welcome friend ;) (by malibor)

by closed account Nwb4iNh0

if two trees are identical

Why we pass two parameters/pointers in bool function when we want to create function to identify if two trees are identical ? and when we call this function in...

[1 reply] : Please try to make just one thread in the future: http://www.cplusplus... (by malibor)

by alexas

cuboid chain rotation - reversed case

I have a chain of cuboids. Every cube's new position is based on the previous cube. The cubes are rotated relative to ABSOLUTE space using axis-angle notion. ...

[7 replies] Last: Thank you very much. (by alexas)

by trenidor

null pointer declaration throwing errors c4430, c2061, c2143, c2238

I keep getting a build error when trying to declare a pointer in a class I created, can someone tell me what I'm doing wrong? Here's the class that needs to de...

[2 replies] Last: wow. Thanks for the help--I took the #include "NPC.h" from the localMa... (by trenidor)

by noir234

Removing the last period or decimal after the final number

Hi, we've been tasked to make a program that will print the first and final input from the user with period or decimal between each number. However I need to re...

[8 replies] Last: Thanks to everybody! I am learning so much from you guys and because o... (by noir234)

by closed account Nwb4iNh0

fork () function | system calls

Here is fork function, (linux system call) I dont actually understand why it looks like this and what is getpid, pid , if someone can help, kindly explain thi...

[2 replies] Last: Forking isn't too hard, but you need to read the man page through a fe... (by Duthomhas)

by LeoV3

How to solve repeatedly squared math problem?

Given real numbers x,a, and natural number n. Calculate the expression as shown on the image(https://i.ibb.co/N2PFhYL/2021-09-17-003451.png): ((...((x+a)^2+a)^2...

[19 replies] Last: #include <iostream> using namespace std; int main(){ unsigned x=2, ... (by anup30)

by FayZ

malloc: error for object: pointer being freed not allocated

I've created a member function that can merge two sorted linked lists. I'm fairly confident that it does the job, I used a while loop inside the function to dis...

[5 replies] Last: You haven't provided the declaration for your List class. Line 2: One... (by AbstractionAnon)

by PK Dey

Why the following code shows error?

Why the following code showing error? #include <iostream> #include <cstring> #include <conio.h> using namespace std; class rangpur { public: char message ...

[5 replies] Last: Within a class, the size of arrays have to be stated. is not allowed... (by seeplus)

by learner999

Matrix Generation by assigning random values to the given index

Hello everyone , I need your help and I will be very happy if you can help me. I need to generate a matrice like M= . I have another two arrays which show...

[5 replies] Last: Thank you so much @lastchance and @jonnin. Your explanations and examp... (by learner999)

by PK Dey

Why the following code shows error?

Why the following code shows error? #include <iostream> using namespace std; class student { public: int id; double gpa; ...

[2 replies] Last: Thanks! (by PK Dey)

by Bazarof

The delete reserved word from library<new>

I deleted explicitly the array texts, but even after that, I can still access to its values. it doesn’t make sense to me, may someone please explain me?? ...

[1 reply] : The memory block is "returned to the heap". The data in the block isn'... (by kbw)

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