General C++ Programming - C++ Forum

I have a template class MyClass (with template argument typename), with a template method: template <typename Derived> class MyClass { template <int ...

[5 replies] Last: I think this is what you want: #include <boost/type_traits.hpp> ... (by jsmith)

by Adalte

Please, h e l p me !

Hi! It's very important for me to solve this problem. I'm very grateful for all hints, proposition or h e l p I can get. Thank You in advance. The proble...

[2 replies] Last: And please use [cod e][/co de] tags (by Bazzy)

by lebronjames

How to display error when a char is entered

How can I make my program display an error when a char (a,b,c) is entered in the menu selection. At the moment, when I enter a char, it displays the error messa...

[1 reply] : Hi....... As Bazzy has correctly pointed out, do not use cin becaus... (by fauntleroy42)

by dmoore210

curses and colors (1,2)

I've been playing with the CURSES library pdcurses to be exact and C++. Although I am trying to write a function that will evaluate everything that is to be pri...

[24 replies] Last: Yea that was the whole problem. I still am not sure why curses decides... (by dmoore210)

by tronthomas

Compile error using pointer-to-member function

When this code is compiled: #include <iostream> using std::ostream; class Value { public: explicit Value(int amount) : m_amount(amount) {} v...

[1 reply] : It's (value.*method)(); Silly, isn't it? (by helios)

by ajay16oct

Getting the width of a line from a file

Hi everbody i wantto get the width of a line from a file.somehow i got this code #include <vector> #include <string> #include <fstream> #include <iostream...

[1 reply] : It's not getting the width of any line. It's taking the size of 'lines... (by helios)

by belkdaddy

creating a data-type

Hey I'm trying to store an integer that is 50 digits long but I can't find a data type that will support this number. If anyone can help my in creating a new d...

[1 reply] : Google arbitrary precision arithmetic. The most used library is GMP. (by helios)

by bassamfci

Memory allocation overflow in c program

In a large system I try to allocate about 1GB of memory on a 4GB system and it blows up (returns a NULL pointer in C), Now I tried to allocate 1GB from ...

[1 reply] : The limits are set by: 1. Available memory, obviously. 2. How fragme... (by helios)

by Ashishm1995

C Program

I have got a problem with a program I just made using a C compiler. The problem is that no matter what input I give, the answer is always 0. Please help. //p...

[3 replies] Last: No, you did not use pointers. You used the double value directly -- wh... (by Duthomhas)

by chiwing

how to pass 4-6 values from dll to exe in 1 function?

1) how to pass 4-6 values from dll to exe in 1 function? can i do that : return (a,b,c,d,e);

[6 replies] Last: You don't have to pass with a struct...You can simply pass references ... (by closed account S6k9GNh0)

by chiwing

expected constructor, destructor, or type conversion before "double"

dll compile occur error when in dev c++ sloved: --> it have some syntax error, i find out that if i don't post all my code , it difficult for others to te...

[13 replies] Last: thanks anyway , the problem have solved let's stop this post~ ~ (by chiwing)

by alogoc

Need program searches numbers inside a txt and perfroms an opperation

Program that will search specific numbers from inside a txt,cut them,and ask me to put the name of the folder to put them in : So the whole idea is abou...

[3 replies] Last: #include <sstream> #include <fstream> #include <string> #include <... (by Denis)

by zheavensky

File locking for read and write

Hi all, I have two threads, one reads a file and one writes to the same file. I want to lock the file while writing so read is blocked until the file is unl...

[1 reply] : In my experience, fopen fails if the file has been opened with write p... (by Disch)

by dwade

How can I stop my never-ending loop

At the moment I have a menu displaying four choices (1. exit, 2. statistics, 3. find mark, 4. display mark). If the user types anything else apart from 0-3, the...

[1 reply] : You should validate the input: http://www.cplusplus.com/forum/articles... (by Bazzy)

by dwade

Finding the average Marks (I dont know how to get the total number of students)

The question I have to answer is to find out the average marks between two students. These students are: studentID: P1001 mark: 78.5 studentID: P1002 mark: ...

[1 reply] : //Corrected: #include <string> #include <iostream> using namespace ... (by Denis)

by somyasinha

UOF

Hi, Has any one worked on unified optimization framework in C++? Somya

[no replies]

by pass

C++why this recursion code is not working?

can anyone fix this to work? #include<iostream> #include<cstring> #include<cstdlib> #include <cmath> #include <iomanip> using namespace std; #define...

[3 replies] Last: The problem lies with your function recursiveCos. It is coded to repea... (by fauntleroy42)

by Deimos

Issue with classes

Hey, Everyone. I recently came across an issue regarding some classes having access to other classes' members. For instance, I have classes such as TextFiel...

[4 replies] Last: And you probably want to make the copy constructor and assignment oper... (by PanGalactic)

by radeberger

terminating threads

Hi everybody, I have a question about terminating threads and deallocating memory. I need to kill four threads from the main function and be sure that the me...

[9 replies] Last: what do you mean with "designing thread"?... as long as u start a thre... (by Incubbus)

by Adalte

Problem with Node and virtual functions

I have to create an abstract class SHAPE with subclasses Polygon, Circle, Rectangle and Point. And I have to create dubbly linked list SHAPELIST but I can solve...

[no replies]

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General C++ Programming - May 2009 (Page 7)