Beginners - C++ Forum - October 2020

by BambiWithPMS

Calculations between VERY small numbers.

I am doing a class assignment on calculating very small numbers. I didn't get very far because the n...

[5 replies] Last: To add to that embarrassment I think you meant COMMA, but don't sweat,... (by againtry)

by Handy Andy

Building a program

Hello MauriceF, Apparently OP has bailed. As best as I can remember this is the original code. And...

[6 replies] Last: Hello MauriceF, Since you are using a floating point variable you sho... (by Handy Andy)

by Shervan360

Read and Write from File in C++

Hello, I wrote a simple program. I have three rows and columns. When I want to read from a file,...

[10 replies] Last: Hello Shervan360, If you have the time post your new code. If you are... (by Handy Andy)

by Thomas1965

Modulair program with (index/arrays)

I would start small. Create an array with 10 elements and read the numbers into it. Don't worry yet ...

[6 replies] Last: And this is what that looks like if you (automatically, so it can be s... (by againtry)

by ntpdev

Assign pointer of derived class to pointer of base class

I assign pointer of derived class to pointer of base class. I wonder why the address of both case a...

[1 reply] : In the case where A is empty, it's address doesn't matter (it's just f... (by dutch)

by Frank5093

Telephone Numbers

Hello again coders, I have another project to do. So far so good I would say. Just one issue with it...

[6 replies] Last: thank you coders for your hard work. Everything works great! (by Frank5093)

by TaftBeach

Pennies on change making program not adding up

I am in a intro C++ class. Our 4th group project has us making a program to calculate change from pu...

[4 replies] Last: Thank you Andy! I looked at the schedule and we will be diving into st... (by TaftBeach)

by leander g

Best way to "get into" creating "GUI" programms?

Time appropriate greetings everybody! I have just recently (few weeks ago) gotten into messing ar...

[7 replies] Last: BTW main in a Qt project is invariably about a dozen lines, if that. h... (by againtry)

by JamesHelp

error LNK2019

How do i interpret an error like this: 1>------ Build started: Project: Project2, Configuration:...

[3 replies] Last: http://www.cplusplus.com/forum/general/113904/ probably http://www.cpl... (by ne555)

by alexas

MKL random generator correlates 100%

When checking my random generator, I am getting total correlation for the initialized random sequenc...

[2 replies] Last: Thanks, I understood my possible mistake! (by alexas)

by dean

TMP, discover whether the return type of a callable is boolean

Hi there, how can we detect the return type of a callable? std::invoke_result requires to specify t...

[6 replies] Last: How can I move the thread to the other forum? Don't move this one... (by doug4)

by fifios

Trying create an array size based on user input filled with random ranged numbers

My goal is for the user to input a number from the range 3 to 8 and it will a create matrices based ...

[7 replies] Last: OP doesn't mention 2-d array. No, but line 30 of the initial paste... (by doug4)

by Frank5093

playing with numbers

Hello everyone, so I have a hard one. So far I have the code to run for normal numbers. Here it's as...

[9 replies] Last: Alternative take using recursion: #include <iostream> #include <cma... (by seeplus)

by maulk

Need help

Hello, I cant figure out why my code will only display up to number 9 and not 13 #include <iostre...

[6 replies] Last: Since the OP seems to have a habit of deleting their posts after getti... (by MikeyBoy)

by imyourjoy

Traingular integer Sequence

How do i print the following using nested loops 654321 54321 4321 321 21 1

[5 replies] Last: You don't need nested loops. Just one. #include <iostream> int mai... (by seeplus)

by jax16

What is ADT?

Can someone tell me the difference between an ADT and a class or struct? It seems the same. And c...

[11 replies] Last: Side note: The abbreviation ADT can, in some other programming langu... (by Albatross)

by Mif

How to compare the first string from last line in a file.txt 'C' (1,2)

I need to compare the first string from the last line in a file.txt So if the file.txt contains...

[27 replies] Last: Ouu I guess you replay after I replay so.. just to know, I solve the... (by Mif)

by closed account oivD8vqX

free vs delete and would this leak?

This code was given to me, via wikipedia. see :http://www.cplusplus.com/forum/beginner/273703/ #in...

[9 replies] Last: Because this was an exercise for me in how to use unique_ptr. In every... (by closed account oivD8vqX)

by lychee

boolean how to print "on" "off" instead of 1 and 0

I am doing multiple inheritance this is my display function void HotAirBalloon::display() { Ba...

[3 replies] Last: An alternative to the if/else block, the conditional operator : s... (by deleted account xyzzy)

by dutch

Integer Partitions

This is an interesting Mathologer video: | The hardest "What comes next?" (Euler's pentagonal formul...

[8 replies] Last: Come in spinner - bait, hook line and sinker taken in one gulp. I didn... (by againtry)

Beginners - October 2020

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