General C++ Programming - C++ Forum

Unknown use of protected member functions.

Hi. This is my first post to the list. I'm working with a C++ framework that has something like this: class A { protected: virtual void init(); virtua...

[7 replies] Last: Thanks for that, Grey Wolf. It was nice to see things from the source ... (by rpgfan3233)

by crayon66

Write and Read Bit Operations

Hi all... currently, i write a program that need to read and write in bit from file. I already read C++ documentation, but i can't find any usefull tutori...

[1 reply] : sorry all, i just figure it my self. But if somebody have some nice... (by crayon66)

by G SATISH KUMAR

INHERITING FRIEND FUNCTION OF CLASS?

'A' IS BASE CLASS. 'B' IS DERIVED CLASS OF 'A'. 'F1' IS FRIEND FUNCTION OF CLASS A IT MEANS F1 SHOULD ALSO BE THE FRIEND FUNCTION OF DERIVED CLASS 'B'. AS D...

[2 replies] Last: A friend function by definition is not a member of the class for which... (by jsmith)

by boyakasha

C++ design problem (memory management and polymorphism)

Hi everyone, There is a design problem I've run into a few times now, and I'm not sure how to get around it. I'll give you an example: class DriverInte...

[8 replies] Last: Going along the lines of ropez' solution, boost also provides the ptr_... (by jsmith)

by toptony

A question about "ifstream"!

hello,guys! I have a question:these codes is from chapter 3,The C++ Programming Language (Special Edition). #include <iostream> #include <string> #include...

[3 replies] Last: hi. guys! Those codes above have some problems. and these codes ... (by toptony)

by yogurt

Rounding

how would i round a decimal like .3333333333e103 to the 7th digit place. like .66666666666666666666666666666666666666666666- to .6666667

[3 replies] Last: If you are using floating point variables to store the numbers then ro... (by jsmith)

by rock2010

help plzzzzzzzzz in c language

hi everybody i have two programs and i need your help to write the please write me the code as soon as possible. Question 1: Write a program that c...

[9 replies] Last: Yes. It is really easily coded there: http://catb.org/~esr/faqs/smart-... (by Repentinus)

by moonshadow9988

passing variable to 'for' loop

can you only pass pointers, or is it the way im declaring the variable is incorrect?

[4 replies] Last: wierd, it works fine now, must have been something I did before. ... (by moonshadow9988)

by harpreet08

Trouble Reading From File Into Array

hi i've been trying to get a text file read into an 2D-array, but the values from the file are not getting stored as they appear in the text file can anyone p...

[no replies]

by deathevan

how to create a explorer in mfc

hi all, i have a question. does any1 know how to create a explorer in mfc with treewiev and listwiev controls so that it can search any partition on the disc? i...

[1 reply] : Have a look here: http://www.functionx.com/visualc/applications/explo... (by closed account z05DSL3A)

by charlie

help please

Can somebody tell me how to prevent the from poping up!!

[1 reply] : Have you tried the?? (by ropez)

by shotjase

saving file

Hey guys i have a header file for class:bitmap i have a function in there called... void save (string filename) const; i now hav 2 write a cpp file and write...

[no replies]

by G SATISH KUMAR

it is not pointer?

string a="cplus"; char* b=a; // THIS STEP IS SHOWING ERROR EVERY STRING AS WE KNOW IS A CONSTANT POINTER. BUT WHEN WE INITIALIZE POINTER TO A STRING THAT IS...

[4 replies] Last: Post fixed for people who might find their way to this thread. Than... (by rpgfan3233)

by JivanAmara

Container of Constructors for Factory?

Hi All, I'm writing a factory class, and was wondering if it is possible to get the address of a constructor, without having an object. I'd like to do somethi...

[2 replies] Last: No, but you can use the Prototype pattern and clone instances of a cre... (by medievalelks)

by mrgreen27

2d array element shifts

i need to horizontally right and vertically up shift the elements of a 2d character array. i have come up with the code below for two separate functions, and it...

[no replies]

by shotjase

displaying 2-d vector

void display(vector < vector <bool> > g, int rows, int cols) { // pre : none // post : displays the grid for (int rows = 0; rows < 9; rows++) { for ...

[1 reply] : First, your declaration of "rows" and "cols" as for loop indices shado... (by jsmith)

by pmsilva

looking for expression evaluation engine

Hi, I need to find an expression evaluator for C/C++ able to support my own functions and my own data type definitions. - the expression will typically be pa...

[1 reply] : Sounds like you want to build your own grammar. I'd recommend looking... (by jsmith)

by naja

how to initialise an array data member with all zeros

hi, is there any other way to do it rather than looping? similar to this: int array = { 0 }; thx

[4 replies] Last: ok thx, now i understand.... (by naja)

by Arna

graphics library

Hi, I received a code using a graphics library by #include <gl/gl.h>. However, during debugging, there happen to be over 100 errors in gl.h. Does anyone know w...

[1 reply] : it seems gl/gl.h for linux OS, not windows, that is why accured errors... (by guruplus)

by shotjase

reading data into d-2 vector

i need to read values into a 2-d vector that are char void readIn(vector < vector <bool> > & g, int rows, int cols, ifstream &infile) { // pre : none // ...

[no replies]

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General C++ Programming - April 2008 (Page 3)