Beginners - C++ Forum - December 2020 (Page 4)

I am learning about tuples and have came across std::tie, and I just can not figure out the reason for it. Could someone explain the point in it? Is it just so ...

[1 reply] : std::tie creates a tuple containing lvalue reference s. Because t... (by JLBorges)

by seeplus

== or =?

== is an equality test. It returns either true (1) or false(0). = is assignment. The value of the left becomes the value of the right. int a = 6; // an assi...

[3 replies] Last: Please stop feeding the trolls. A question that retarded is probably n... (by dutch)

by Cintru

Trouble with strings

Hello, im having a problem with a program. Im supposed to write a code where a user inputs a word (doesnt need to be a real word) and i need to make a function(...

[5 replies] Last: For the second part, consider: #include <iostream> #include <cctype... (by seeplus)

by Elon C

How to deal with Segment Fault __dynamic_cast () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

I was doing a demo of Omnet++. I met this Segment Fault and had no idea about it. #include "include\sdn.h" #include <stdlib.h> #include <stdio....

[4 replies] Last: Segment Fault __dynamic_cast There is no usage of dynamic_cast in ... (by seeplus)

by drhunter

why this code show unexpected answer?

what is the wrong in this code? when i input twelve 1 then it show 66 but why? #include <iostream> using namespace std; int main() { try { ...

[2 replies] Last: Thanks! i get the answer. I use a break in loop & it's solved (by drhunter)

by Brainspell

question about char* name[]

umm, for char* name , what are all the ways to define them during initialization? I'm trying to char* name = "Something"; , but ale is saying it's inval...

[3 replies] Last: @Brainspell. It depends upon what you want. I thought you wanted to in... (by seeplus)

by struggling132

Two Player C++ BattleShip game

Im coding a battleship game in C++ and Im confused where on where to start. I typed up a pseudocode for the game. Where is the best place to start? Should I cha...

[2 replies] Last: How will you represent the board itself? Nail that down. Note that t... (by dhayden)

by DonnaPin

constexpr question?

Hello, I have just started to learn about constexpr. I found code online for a function using constexpr so I copied it (first code shown below) but my VS was gi...

[2 replies] Last: MS writes in https://docs.microsoft.com/en-us/cpp/cpp/constexpr-cpp?vi... (by keskiverto)

by ElleJay

Error: no match for operator=

I want to initialize a hash table but I keep getting an error. How do i properly access elements from HashTables? //HashTable struct struct HashTable { ...

[4 replies] Last: Consider: //Condition struct struct Condition { string conditionNa... (by seeplus)

by FreshCoder

Pow Function

I am trying to make a calculator code using switch statements. There are many different arithmetic operators but when I use the pow function with integer number...

[2 replies] Last: #include <iostream> #include <cmath> int main() { std::cout << "... (by JLBorges)

by kmcfall

2nd update on vehicle registration fee

My previous post, http://cplusplus.com/forum/beginner/274895/ opened my eyes up on some of the code I was writing. I have come up with a new code: #incl...

[14 replies] Last: #include <iostream> #include <string> #include <fstream> using name... (by againtry)

by Benduka2

I need help with string

Well, recently I came back to C plus plus, and I was so confused when I started using it again. Anyways, I need to write a program in which the user enters a si...

[2 replies] Last: I see, I'll try it out (by Benduka2)

by CStudet

compilation of 2 games, 1 simple grocery and a grading system.

How can I execute all the program one by one by choosing them in sub menu under the main menu. That's my problem. But I already put the codes here. here's my...

[2 replies] Last: Hello CStudet, I have worked on your program a little and came up wit... (by Handy Andy)

by Vendetto

Reading Text File and Appending (1,2,3)

So I am starting to create this program to read a text file and copy the text to another file until it reaches the line that is </settings>. I thought I was do...

[42 replies] Last: I can see why you would ask that. Originally the idea was to come up w... (by Vendetto)

by Mif

Help with ASCII "C"

Hello again.. I wrote a game and I use some of these symbols "220, 221, 222, 223, 219, 17, 2.... etc" in the code with the 'printf()' function like this: pr...

[5 replies] Last: Well.. Now you see what I meant jlb ? As you said in your second ... (by Mif)

by dansnad

Print Vector from Class

Hello, I am trying to read a data file into a vector and print the values through class. When compiled there are no errors, but the program just stops after ope...

[4 replies] Last: void readfile() { while(infile >> t) { f... (by seeplus)

by drhunter

Exception handeling

I want to demonstrate all exception in one program. I try to demonstrate in a single program. But i am confused is my code right for this question?(Write a C++ ...

[3 replies] Last: Thank you Andy (by drhunter)

by MyOnlinePersona

ternary operator

I have problems understanding ternary operator. I read basics of how it works many times, and have basics understanding, but still strugle to fully follow throg...

[2 replies] Last: > Does this ternary operator code mean the same as the code below it? ... (by JLBorges)

by kmcfall

update on vehicle registration

Hi all! So, the other day I posted asking for help on writing a program to meet the following criteria: Problem: Write an application in C++ that calculates th...

[4 replies] Last: Hello Handy Andy. I scrapped the whole code, and decided against using... (by kmcfall)

by kerem59

Function

Hello guys.I'm new at c++ programming.I have a question for you.The question is : Add a new function that find how many students have avscores>5 and calculate t...

[2 replies] Last: Guess this means that you have your answer? That was fun to work on. (by Handy Andy)

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Beginners - December 2020 (Page 4)