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Beginners - January 2020 (Page 10)

I am adding some quality checks to the sample program for a simple calculator example. The check for divide by zero was included. I added a check for a proper...

[16 replies] Last: Andy - I am still trying to assimilate all the information in your lon... (by SJSwanson)

by ForeverNewbie

using c++17+ <filesystem>

in this program it simply gets it's own containing directory and adds a data folder if there isn't one already. isn't there an easier way like directly conc...

[5 replies] Last: wow, that was fast. Thanks guys. (by ForeverNewbie)

by nuderobmonkey

No of elements wich will passed by *argv[] in main()

I read at https://en.cppreference.com/w/cpp/language/main_function that argv should hold argc+1 pointers, whereby the last should be '\0'. So I made the short...

[3 replies] Last: false == '\0' == 0 == NULL and I think also == NULLPTR but not sure. ... (by jonnin)

by jrbobdobbs83

Basic Recursion- Hints requested

Problem Statement: I am trying to wrap my head around recursion, and I'm slowly getting a handle on it, but I keep running into brick walls with it. My curren...

[6 replies] Last: It should also be pointed out that it is pointless for this function t... (by dutch)

by wirelesskill

C++ Sorting algorithm error

Hi, Hoping someone can point out the error of my ways. Im doing an assignment in class where we have to create a c++ program that uses a sorting algorithm to s...

[14 replies] Last: system recognised iti as Data.csv.csv Looks like a Windows "problem,... (by George P)

by Tom001

Guide about how to read a txt from a class

Hello! I'm trying to define a class call matrix who reads a txt with the data but I'm having problems with the lecture part. I'm posting the code that I have wr...

[2 replies] Last: A couple of problems, first I don't recommend having the class open th... (by jlb)

by myoggradio

Need C++ Compiler for Windows

Hello, i did my first Steps with C++ on Linux and used g++ for compilation and linking. Now i want to compile same of my first projects on Windows. Can you p...

[11 replies] Last: Visual Studio (Visual Studio Code is a different thing) can compile C+... (by George P)

by hanscalc

Loging

Hello members, I have a question is there a possibility to log the input and output from a Roman numeral conversion tool? So that all the conversions automatic...

[4 replies] Last: would a console.log(whatever) in the .js file do it? the reason we ar... (by jonnin)

by Bopaki

My function : void print() does not print out the list

Everything look fine but the last part which should print the list does not #include<iostream> #include<cassert> using namespace std ; template<clas...

[2 replies] Last: Thanks coder777 it worked like a bomb. I just wonder how come some peo... (by Bopaki)

by GabeSonny21

help i dont understand the question

Please tell me what does this question want QUESTION: Change these expressions inform of compound statements (assume a and b have been declared and initial...

[5 replies] Last: It is asking for an explanation of compound statement: b = ++a * 5; ... (by eyssant)

by Kallinteris Andreas

Lamda func how to return array

lamda newb here let's say i want to return the array (of ints) {0,4,9} with a lamda func how it be done i have tried: {0,4,9} {return {0,4,9}} i wan...

[3 replies] Last: > let's say i want to return the array (of ints) {0,4,9} with a lamda ... (by JLBorges)

by TreeTicket

Foo() vs. Foo{}

Hello, I have two questions: 1. What is the difference between Foo() and Foo{} here: struct Foo { // ... Nothing }; int main() { throw...

[3 replies] Last: I think this covers the topic: https://en.cppreference.com/w/cpp/langu... (by keskiverto)

by stoneJax

Heap Corruption

Hi! I have written a binary search function which finds the last occurrence of a number in an array. When I test it, it always seems to give the correct output....

[3 replies] Last: @salem I had tried that earlier too, but then I wasn't getting the cor... (by stoneJax)

by jhon12

how add class

hello I want to ask ... the program below is the presidential election program and the program is ready. I want to ask how to add classes to the program? please...

[7 replies] Last: nuderobmonkey's code compiles for me. I don't see anything particularl... (by Ganado)

by florarose

Computer guesses the number

Hello, Well my teacher gave us an assignment and I have to do it by only while, for, if-else loop. I cannot even use do loop. Also we can't use "Rand" command ...

[12 replies] Last: 26 the size is 100, so lg(100)+1 is the max # of tries. or, 7 max gu... (by jonnin)

by Majeek

cout name of vector in a vector (2D Vector)

My goal is like this: std::cout << Colors << " " << Colors ; Which would output : Red 0. How would I achieve this?? Or am I thinking about it all wrong ...

[2 replies] Last: The variable you call "Colors" is your deck, right? I assume that at s... (by Ganado)

by Nedrozak

Sort records in struct

Hello!I need to sort students by name and by age. But I just can't figure out how to do it. Basically I need a function like chkinfo() to list all records but s...

[3 replies] Last: student s; //...fill s stud.push_back( s ); (by nuderobmonkey)

by leelion

inability to read line, more than a specific one!!

Dear I have a piece of code. It reads input files (Data.txt, Index_list.txt, and Nb_list.txt) and gives output file (NB.txt). Index_list.txt, and Nb_list.txt f...

[1 reply] : Don't cross-post. http://www.cplusplus.com/forum/general/267017/ (by salem c)

by hbcpp

Binary Search Tree With Templates

I have written a working binary search tree, then I went on to change it so that it working with different types. All is well excep for one line that stops the ...

[5 replies] Last: @lastchance Thanks it works. (by hbcpp)

by mrpear2020

Strcpy not being recognized - 'not declared'

Hello, I am trying to execute the following requirement. Note I try to use 'strcpy' but I am getting an error. I am not sure if this could be a problem with my ...

[3 replies] Last: In C (and in C++ as well as an alternative), it's in the header file ... (by Repeater)

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