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General C++ Programming - August 2017 (Page 7)

Exercise 7.3.3 C++ without Fear 3rd edition

Revise the example so it implements the bubble-sort algorithm, which is potentially faster than the selection-sort algorithm. I just need to know what to chan...

[2 replies] Last: http://www.cplusplus.com/faq/sequences/sequencing/sort-algorithms/bubb... (by Duthomhas)

by klockstycke

Creating CSV-file with small numbers content

I'm trying to find out how to get the right format when using ofstream when writing to CSV-file. When writing small numbers e.g. doubles, i want them to look...

[10 replies] Last: Required reading when messing with CSV files: http://creativyst.com/Do... (by Duthomhas)

by anogio

non const ref return type is bad?

I was recently told that a method should never return a non-const reference to a type like so: Foo& getFoo() { return m_foo; } I can th...

[2 replies] Last: Yes, that was my reasoning too. I thought it was odd that this person ... (by anogio)

by waruqi

A make-like build utility based on Lua for building c/c++ program

Introduction (中文) xmake is a make-like build utility based on lua. The project focuses on making development and building easier and provides many feature...

[no replies]

by Uniqueusername

Water level control with arduino, help

Hi, I'm working on an assignment that needs to meet the bellow requirements. This is my first time using C++ and wanted to know if the code I've written is goin...

[3 replies] Last: Unfortunately I think you need a different approach. Consider this: i... (by dhayden)

by Frank14

Developing a non-STL list

Hi, I'm going to using the following code create my own List: #include <std_lib_facilities_4.h> using namespace std; //*************************************...

[7 replies] Last: Why did you declare first and last within protected scope and no... (by Frank14)

by user123random

UART programming

I am writing a UART receiver, why am I getting line 65 instead of line 75 ? I have checked using minicom and there are characters being received, so I suspect i...

[9 replies] Last: line 16 seem like carriage return but it is printed as 'a' instead of... (by jlb)

by hebrerillo

advice on how to free memory leak

Hi everyone! I have to deal with a memory leak in a code that is not mine, and I want to ask for advice on what is an elegant way to free the memory leak. The ...

[1 reply] : Use value semantics, perhaps? class A { public: int a; ... (by JLBorges)

by condgraduate

To Compare two rational numbers

I am trying to compare two rational numbers to see if they are equal or not, but there is a logic error. For example, 1/5 and 5/25 will give me an equal, but 1/...

[4 replies] Last: Comparing floating-point numbers for equality is dangerous because of ... (by lastchance)

by hychan

Best Book on Algorithms

I've learnt about C++ algorithms before, but until now I still can't use most of them properly in my coding, and there are some topics that I just can't compreh...

[11 replies] Last: @hychan This website is referred to at the cpbook site and might be us... (by closed account 48T7M4Gy)

by hychan

A Word

I'm trying to find a word that means printing only a part of the output in the middle of a program to check whether there are any bugs/errors in the algorithm. ...

[6 replies] Last: I did a little search on the Internet and found the word to be "loggin... (by hychan)

by Handge

Print a character based on variable

I know Google Spreadsheets has something like this =REPT("|",100) Is there something like that C++ has?

[3 replies] Last: char reps = {0}; memset(reps, '|', 100); only works on byte sized st... (by jonnin)

by agusbudipras

Undefined reference.......

I have a program like this: /*PROGRAM StatStar General Description: ==================== StatStar computes a ZAMS model using a number of si...

[11 replies] Last: I downloaded all the files from the reference I gave, replaced StatSta... (by lastchance)

by closed account 1y7j1hU5

almost done with my class!

Please help me finish my class! Thank you! Assignment 15.1 [95 points] This is part 2 of a two part assignment. Your score on this assignment will take in...

[1 reply] : http://www.cplusplus.com/forum/general/219811/ (by closed account 48T7M4Gy)

by closed account 1y7j1hU5

Having difficulty with assignment!

I am taking this class and am almost finished! This is the second to last assignment I have to do do but I am having computer issues. Please help me pass this c...

[3 replies] Last: http://www.cplusplus.com/forum/general/219812/ (by closed account 48T7M4Gy)

by sunnylei

Multi Thread running after join

Ref: http://www.cplusplus.com/reference/thread/thread/join/ In below code, what I expect is t2 should print "pause of 2 seconds ended" in 2 seconds after t1 ...

[2 replies] Last: ... what I expect is t2 should print "pause of 2 seconds ended" in 2... (by gunnerfunner)

by oldspiderdude

A strange limit for my quicksorting code

Here is my code The problem is when I change nNum, the size of the array, to 520241, the thing crashes. When it is 520240, the program (without printing all th...

[1 reply] : You may be running out of stack space. Try using an array with a stati... (by JLBorges)

by dominover

String pattern matching expressions?

I'm not sure what you call the below but I'm trying to understand where to start learning about writing expressions to iterate through C++ strings. How do I...

[4 replies] Last: Start with a simple, minimal, tutorial introduction. For example: http... (by JLBorges)

by DragonOsman

PPP2 Chapter 16 Exercise 3

[I hope someone who's read the book or is reading it will (also) reply, if possible. Thank you.] My code: // Osman Zakir // 8 / 2 / 2017 // Bjarne Str...

[6 replies] Last: I'm not sure how the debugger will help in this case since I don't kno... (by DragonOsman)

by GregJ7

Template iterator confusion

A line like the following appears on en.cppreference.com/w/cpp/experimental/fs/directory_iterator: for(auto& p: fs::directory_iterator("path_to_a_directory")...

[2 replies] Last: I didn't want "auto" because I wanted to understand what was going on,... (by GregJ7)

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