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General C++ Programming - March 2021 (Page 4)

i cant figure this assignment can someone help? 22. Create a program that calculates the average weight of 15 fruit (mandarins) when the weight of each fr...

[2 replies] Last: What part are you having difficulty with? Do you know how to calculate... (by seeplus)

by VoB

Marking a function as const: what does the compiler do?

Hi everyone, I'm trying to understand what happens when a function is marked as const in a class. Consider the following simple class, where a function foo is u...

[3 replies] Last: const int* a means that "a is a pointer to a constant integer"? Co... (by Ganado)

by onetwo123

Incorrect result

I check time of foo(). It I make a graph of the dependence of the average value on n I should get a parabola. But now I have this result. Avarage grows up but ...

[9 replies] Last: > Ask yourself: Can something else running in the same machine at the... (by onetwo123)

by Hawlong

Packing exe + dlls into one executable

Hello everyone, please any way to Packing exe + dlls into one executable? i use Dev-c ++

[5 replies] Last: I'll give a reply, but I don't have very good news. There is no standa... (by Ganado)

by jake john

Curving the Grade

Write a program to help determine a grade curve. The program reads all the student scores, determines the highest score, and then assigns grades based on the f...

[8 replies] Last: only available with -std=c++11 It's 2021. Time to upgrade your comp... (by lastchance)

by moctar

divisibility of a Binary number

is there any ways to check binary divisibility without using modulo like (p%5==0) but rather using decrease and conquer algorithm. i already now that to chec...

[1 reply] : Don't cross post https://www.cplusplus.com/forum/beginner/276805/ (by salem c)

by onetwo123

Incorrect result (arrays)

There are 3 methods. measureTime() works correctly. But meanTime() and stdTime() give me something like -3.13558e+67. How can I fix it? statistics.cpp #i...

[1 reply] : - get rid of global `means'. - get rid of all your input/output opera... (by ne555)

by aardalde

Last node in linked list not sorted

This works perfectly except the book that's supposed to go first (i.e. a book that starts with 'A') is at the end of the list. void inventory::insert_sor...

[1 reply] : One issue is that you are swapping just the name of the book, not the ... (by Ganado)

by moctar

strassen based matrix inverse

i am trying to write a program to get the inverse of any type of square matrix using strassen based matrix inversion. but what i don't understand is how to rep...

[1 reply] : [Duplicated here http://www.cplusplus.com/forum/beginner/276798/ ] (by seeplus)

by Beginners12

Friend function and fraction

have an assignment that requires alot of use with classes, the idea of the code is to manipulate fractions to find greatest common denominator (GCD) and other t...

[1 reply] : [Also duplicated here http://www.cplusplus.com/forum/beginner/276793/ ... (by seeplus)

by timestime

Palindrome

Is there a way to determine if an integer is a palindrome in C++?

[3 replies] Last: You can always convert an integer into string and check that. (by keskiverto)

by brim4

How can I use typedef and auto to clean up my unique_ptr<vector> declaration throughout my projects classes?

Hello, I'm new to c++ so any help will be appreciated. When I'm making a weapons declaration it's quite cumbersome and long. It would be nice to be able to t...

[5 replies] Last: Thanks, guys. I'll close this now. I realised that I had to place it b... (by brim4)

by learning123

Reordering array elements

Hi, I am a rookie when it comes to C++ and would appreciate your insight, so I can go up on the learning curve. I am trying to write a function that reorders...

[9 replies] Last: Thank you all for your help and advice. Learning is a process and it ... (by learning123)

by JUANDENT

overloaded set of lambdas not working when using variadic template classes

Hi, The idea is to be able to create an object with several operator() taken from lambda expressions in order to overload it. The idea works fine when we ha...

[4 replies] Last: @mbozzi your code does not compile for me in Visual Studio 19 v16.9.1... (by mbozzi)

by JRManx

Weird template return value

I am trying to make a function template that takes a "vector<T> v" as the parameter, and returns the total of all values in "v". It is supposed to be able to a...

[8 replies] Last: Yeah, I bet most of us have done that (or something similar) at one ti... (by JRManx)

by frek

Printing std::map contents differently

The exercise (8 of chapter 21 of the book PPP) says: Take the word-frequency example from §21.6.1 and modify it to output its lines in order of frequency (ra...

[6 replies] Last: I'm not exactly sure what you mean, but the operator for std::map is ... (by Ganado)

by Passionate programmer

calling non-template version

Hello all, I am having problem causing non-template function to be called. I want the minD with two parameters to be called for integer values and I want no...

[12 replies] Last: Thank you so much for your time. I appreciate it. (by Passionate programmer)

by skolterman

Dice c++

Hello! I have a c++ assignment, im supposed to make a program that will throw 6 dices then find out the total sum and find and point out the highest and lowest ...

[1 reply] : Are you supposed to be using arrays for this assignment? I see you hav... (by Ganado)

by dean

Reserve space in the stack for an unitialised object

Hi folks, what's the best way to reserve some space in the stack for a uninitialised object. For example: uint8_t* data = m_prefix; MyUnitialisedObject _obj...

[8 replies] Last: @doug4 ah right =) @seeplus due to optimisation reasons, already prof... (by dean)

by jake john

Locker Game

Imagine a high school hallway with n lockers and n students. Now imagine a single student walking down the hallway and opening or closing the lockers. That's ...

[18 replies] Last: what does vector<bool>& mean? I am confused why it has to be a vector... (by doug4)

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