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General C++ Programming - August 2016 (Page 9)

Hey guys, I'm trying to implement a binary search tree. I'm having an issue with the destructor, which calls another function to kick off the recursive deletio...

[3 replies] Last: WOW. Missing the scope resolution for the DESTROY function. LIne 46 of... (by edge6768)

by Willir

Need help with Petrol Station Program

The problem I am having is that I am finding it difficult to output Amount Dispensed & Total Cost in the customer receipt. Is there a way I can cout the output ...

[15 replies] Last: You sorted the issue out? I'm having a very similar issue with mine, t... (by Browny13)

by np1984

assign memory using new

I assign memory to array of pointer as shown in code snippet below: #include <iostream> using namespace std; #pragma pack(1) int main() { int (*p) ;...

[5 replies] Last: Thanks a lot for the explanation. I got it. (by np1984)

by fenggg

Hi ppl , i having problem caculating the total monthly expenses , anyone mind help mi out with this ?

#include <iostream> #include <fstream> #include <cstring> #include <stdlib.h> using namespace std; int main() { double total; int choice; ...

[15 replies] Last: how u gonna do that You progressively add the relevant item as you p... (by closed account 48T7M4Gy)

by Mwangi Elijah

These lines are reading a long loop

I want to read a line (record) of a CSV file. And so as to increase accuracy of hitting the correct record and then adding some information if a record is found...

[2 replies] Last: Just wondering is the search on all these terms redundant? Guessing (b... (by TheIdeasMan)

by technologist

whats wrong with this code? run-time error

Hi Twilight zone on review here...what am I doing wrong? Compiles fine, but throws run-time error (has to closed). Want to assign 7 to ptr... #include...

[14 replies] Last: I got it, thx *p_ptr points to allocated memory that has no name... (by technologist)

by Nico

How to make a thread safe DLL?

Hello, I am creating a DLL and I would like the application that uses it to be able to use the same instance of my DLL with multiple threads simultaneously....

[7 replies] Last: Hello, I think I see what you did there (took me a while). So I chec... (by Nico)

by asterisk nullptr

Adding to a map of unique pointers

Hi, I am trying to convert my program to use smart pointers but am having trouble creating a map of unique pointers. The map contains sf::image and uses the fi...

[4 replies] Last: Thanks for clearing that up. I should be able to finish converting my ... (by asterisk nullptr)

by Wu zhen hai

float Nan

how to treat a flaot as Nan? method1: float x; if(x!=x){"x is a Nan"} method2: float x; if((uint32*)(x)&0x7FFFFFFF > 0x7F000000){"x is a Nan"} Why ...

[1 reply] : std::isnan is better: http://www.cplusplus.com/reference/cmath/isna... (by Cubbi)

by technologist

return *this

*this at the end of a function snippet: return (*this); I read that this is returning the class pointed to by "this". My question is how to use the retur...

[4 replies] Last: Thx, that worked fine! Going just a little deeper, what does returnin... (by MikeyBoy)

by taha24

logic gates functions

this a four logic gate contains the logic : AND, OR and NOT, and it suppose to take four in put and divide them into to numbers and add them together like this ...

[1 reply] : http://www.cplusplus.com/forum/beginner/195539/ (by closed account 48T7M4Gy)

by closed account LyTXjE8b

Understanding Massif Memory Usage Measurements

I've recently been attempting the problems on CodeEval.com, where solutions are rated on execution time and maximum memory usage. However, I've found the memory...

[no replies]

by jwalpole

assign values to struct string[2]

I have googled and have not found anything relating to this, or am just looking for the wrong thing. I have a struct enum LANG_ID_TYPE { FIRSTLANG,...

[2 replies] Last: sorry. the problem is that when t changes from 0 to 1 and I do a watch... (by jwalpole)

by flo24601

Kalman filter, measurements and estimation

Hello, I am using a Kalman filter with a PI controller. The goal is to control a mirror to stabilize the position of a laser spot: I am sending a disturbanc...

[no replies]

by vastrolorde

Physics engine

Im thinking about trying to write some basic physics engine. Do games have a single physics engine instance that controls all the physics in the game, or are th...

[2 replies] Last: OK ty. So i just have to dispatch worker threads if i need multi threa... (by vastrolorde)

by danimondial

Type of C++ Programming

I heard that alot of website/games use C++, but what 'type' of C++ do they use? At all my C++ programs I use the Console Application option and Code::Blocks? Wh...

[2 replies] Last: It might be a little bit surprising that the website/games use the exa... (by liuyang)

by closed account iGLbpfjN

Error when compiling

Well, I'm doing a code that works like a register machine. You can register a product, inserting the code and the price. Also, you can search a product by inser...

[2 replies] Last: Im pretty sure you accessed memory not belong to you. Issue 1: A very... (by liuyang)

by dailei

Question about stl code

I read some codes implementing iterate in STL and I'm puzzled by it's definition :(partly) template <class T,class Ref,class Ptr> struct __iterator { t...

[2 replies] Last: The implementation is sgi-stl ( g++. 2.91.57) I read the code later an... (by dailei)

by keanedawg

Sequence Points - Order functions are being called

I'm a little confused, I was reading this article here http://stackoverflow.com/questions/3457967/what-belongs-in-an-educational-tool-to-demonstrate-the-unwarr...

[9 replies] Last: @ JLBorges Thanks for your always interesting replies :+) Perhaps w... (by TheIdeasMan)

by rakan511

help

hey guys can someone explain to me how can I solve this ,,,,, Write two functions to compute the values of my_cos(x) and my_sin(x) respectively using the follo...

[2 replies] Last: thank you that was helpful really appreciate it .... (by rakan511)

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