Beginners - C++ Forum - September 2022 (Page 2)

Consider the code below: int total; std::cin >> total; int ary ; for(int i=0;i<total;i++) ary = i; for(int i=0;i<total;i++) std::cout...

[9 replies] Last: It's not as straightforward as it looks because it interferes with the... (by Peter87)

by ninja01

A linux for programming

I never used a linux OS, I am open to the idea of using it lately, what is the best linux for programming you advice? thanks

[18 replies] Last: Got it, thank you everyone) always honored. (by ninja01)

by rozick1

Work around for limitation of template virtual member functions?

Hi I have a Message class which other classes inherit from. The inherited classes will need to have a serialisation member function. I would like to make these...

[1 reply] : You could use some special-case code for each class, or exploit that T... (by mbozzi)

by cplus2303

checking if the inputs are valid Palindrome

How can I make this program work to determine whether these 5 palindromes are valid or not? #include <iostream> #include <string> struct Result { int...

[6 replies] Last: thank you guys :) (by cplus2303)

by closed account E093605o

building a multilayer perceptron

Hello, I want to implement a simple multilayer perceptron for digit recognition. I have started to read the c++ primer 5th edition book 2 days ago so I am no...

[9 replies] Last: @dvdlly, I am well aware that the code you provided is a header file, ... (by lastchance)

by ninja01

Unexpected behavior 3!

In the following code it is clear that ptr holds an address int nbr = 3; int *ptr = &nbr; std::cout << &nbr << std::endl; std::cout << ptr << std::endl...

[6 replies] Last: [quote=jonnin]some embedded systems expect you do to this (but their l... (by Peter87)

by dorito200

Binary search of a dynamic array of strings

Hey yall, so for school I have to make a recursive word ladder program, and I wanna put a binary search in it. I have a function that checks the inputted word i...

[17 replies] Last: OK. We have a winner! Obviously that's what I meant to say when I said... (by seeplus)

by ninja01

Is this an address?

int main() { int *ptr; std::cout << ptr << std::endl; return 0; } I know that uninitialized pointers should be avoided because the...

[3 replies] Last: Technically it's undefined behaviour. [quote=jonnin]now your program ... (by Peter87)

by kdrewes

Pointer Practice

Hi, I am currently experimenting with pointers and classes. Everytime my pointer reach 80% of its size, I attempt to create a expand it's capacity by 100% by u...

[3 replies] Last: There's also an error on L72... Also the code can be somewhat simplif... (by seeplus)

by Geckoo

input parser

// here we can write directly our algorithm so as to generate a track inline char algorithm(int t) { return (~t >> 2) * ((127 & t * (7 & t >> 10)) < (245 &...

[11 replies] Last: For a simplified getNum(), consider: template <typename T> requires... (by seeplus)

by closed account oj2wbRfi

print every second leaf node from right to left

let me say that I have tree and the tree has these leaf nodes from right to left: [ 9, 4, 6,16 ,8,19, 10,8 ], I should write function to print every second lea...

[2 replies] Last: Maybe something like (not tried): void writeEveryOtherLeafNode(Node... (by seeplus)

by d34dc0d3

char* mystery output

for first b->readData() i get Enter Student name: Enter Student surname: Enter Student ID: but for second on i get Enter Student name: Enter Student surn...

[10 replies] Last: where Enter Student name: Enter Student surname: are together when us... (by seeplus)

by anonomyss

Valid Access

This is the code we were given and the question is , Is line 18 (return x;) a valid access and justify your answer. My question is. What is Valid / Invalid acce...

[12 replies] Last: @anonomyss: Can you now answer the questions below? class A { int... (by keskiverto)

by newbieg

They overloaded a struct constructor?

I was checking out the "Flare Game Engine" source code for fun, and I came across this: [line 6] class Color { public: Uint8 r, g, b, a; Color...

[4 replies] Last: Thank you guys, I've already got a couple of situations that I could u... (by newbieg)

by AlexCantor

#if 1 statements #else other statements

In the following preprocessor code what is the use of statements and other statements? When will the other statements be used? Please explain what is the use o...

[7 replies] Last: Thank you all for the excellent information. Best regards, (by AlexCantor)

by ninja01

Questions about pointer address

Consider the code below: int nbr = 3, *ptr = &nbr; std::cout << ptr << std::endl; int *ptr2 = nullptr; std::cout << ptr2 << std::endl; My output is: 0xb...

[9 replies] Last: std::format can print out pointer addresses, it has a format presentat... (by deleted account xyzzy)

by ninja01

Weird output!

Consider the code below: int nbr = 7; string str = "Hello world"; cout << str << ' : ' << nbr << endl; I putted the string literal " : " inside th...

[12 replies] Last: Thank you everyone) (by ninja01)

by anonomyss

Help with code

I need to change the count() so that it counts down till 0 but it should still remain a recursive function and should not be a for loop. #include <iostrea...

[6 replies] Last: #include <iostream> void count(int counter) { if (counter >= 0) { ... (by seeplus)

by cplus2303

printing a user input in Queues

How can we print user input variables including their ID, Name, and Pages of their document in Queue structure with an int main function? #include<iostream> ...

[2 replies] Last: thank you so much man :) (by cplus2303)

by shaefayejem

Override Class member array variable values

When I have an array as a class member variable and I want to override the default values by calling a separate constructor. Is what I am doing the optimal w...

[10 replies] Last: Yes, it's global. But that's fine as it's a global constant. constexp... (by seeplus)

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Beginners - September 2022 (Page 2)