C / C++ Forum

Can someone explain me what an interface in C++ is. Is that just about the data encapsulating capability of C++ classes? Marcel

Q1: What happens when you apply parenthesis to the class type name? Is the constructor for the class called and returns an object?, or what? in main...: MyClass(); // end

Hi, im having problems compiling some code, and i dont understand why. I've made a Matrix class for any kind of data and now im implementing an inherited class with all the mathematical stuff (MMatrix) (determinants and so on). The data and the number of rows and columns are declared in the base clase as protected. When i ask the functions of...

How can i declare an array in c#? Joy_chow@hotmail.com

How do I inherit or templatise from a continer class, without having to reinterate (type) the member functions ?

hello all pls help me to explore the diffrence b/w c and c++ by using a program example code that can illustrate the diffrence between the structure programing and object oriented programing. thanks

This code is C++ and works fine. But does anybody know how to sum it up so i dont have to put the same thing in there over and over again? Your answers are greatly apreiciated. --Nate (the code is in quotes)

Im new to C++ and having a bit of a problem, I have a program, written in Visual C++, designed to take in data and then let a user search through it but while it lets the user search it never comes back with my error message if the search isnt successful { char search_town; int result = 0; int sub = 0; bool custfound = false;

i want to create a program that checks if file is readable and writable ? any help will be great.

I am reading in io input using 'cin' in a do-while loop. But the error bit apparenlty keeps getting set, leaving the console in a "frozen" state until I hit enter twice. How do I reset this error bit? Thanks.

Hello, I have a question about what kind of datastructure to use. I'm reading collumn based data in the form of: 10\t12\t9\t11\n 24\t11\t4\t10\n ..... I now have a structure which allows me to access the data like this: x->row.coll.value.d;

I remember from C that you are not supposed to access different members of a union at the same time? It seems to say the same thing in the C++ standard (9.5.1) "In a union, at most one of the data members can be active at any time, that is, the value of at most one of the data members can be stored in a union at any time." What does it...

Hello Experts! I´m searching sites,tutorials or other, about Virtual Functions! Any person can hel me? Thank´s! Bye!

Hi, Is there a C++ alternative for the Java Castor Project (Java thirdparty tool to create xml files from Java Objects and vice versa) John

I have COM server written in VC++ 6 And I'm migrating this aplication to VS2005, i've reach a good level in my project but now I have this famous erros LNK2005. I know the cause :( #include) calls the same file 2 times but I should let the code without changes cuz it's not mine so if you can give me an idea to resolve this problem just...

I have an huge application written using C and Pro/C. I want to write C ++ function which will access oracle using OCCI. Can I reuse Pro/C connection?

Hi, I have a question on constant variables. In the following code snippet, I have a function assign() that takes in an iterator to the private variable v, the number of stuff to assign (int n), and the information to assign (a const pointer to a class object Vector<TYPE>. According to the arrow below, I put a const keyword in the...

Is this the correct way to think of "base class"? The "base class" is a class from which other classes are derived. The "base class" will never be derived from another class.

What is teh actual use of declaring FUNCTIONS globally for eg #include<stdio.h> int add() // add function void main() { }

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On page 32 of TC++PL SE is an example of a complex class as follows: class complex { double re, im; public: complex(double r, double i){re=r; im=i;} //... }; On page 262 of TC++PL SE is an example of a complex class as follows:

Which MFC runtime dll is the CArchive object in? I have a situation where the CArchive constructor gpf's when using a certain set of MFC*.dll and msvc*.dll. Trying to narrow down which file is getting called.

Having decided not to use macros at all in designing my reseatable references, and having looked through the list of overloadable operators and combinations of them, I've settled on the following syntax: Reseat >> kref = moon; Where "kref" is the reseatable reference and "moon" is the new object it'll refer to. Overall, once a...

I'm including a library in my program that I have wrapped in a namespace, since it contains typdefes that clash with my own. Like this: namespace OPT{ #include "OPT/NLP.h" #include "OPT/NLF.h" } When compiling, I get a number of undefined references to code in

Situation: Running a MPI program that segfaults. Cannot open program up in debugger due to nature of MPI system. Using g++ 3.2.3. Goal: Find out which line it segfaults on; ideally which variable name causes the error. Some kind of error message akin to VC7's "stack corrupted around varname" message would be very nice.