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General C++ Programming - January 2011 (Page 15)

Hi,i tried to write a code to compare the classes with templates but this code is not working.I think i shoul use operators but i don't know how to write it in ...

[6 replies] Last: I deleted X var and then it is solved. Thanks lot to guestgulkan and ... (by Faim)

by Bezi

How to catch error when deleting a pointer?

I have a piece of code, where at some point I need to delete a pointer to get sure that the memory is freed. However, sometimes the memory for this pointer is n...

[13 replies] Last: Exceptions are, as their name implies, for exceptional circumstances*... (by Bezi)

by Rinu

Array Merge

Which is the best algorithm used: there are two arrays : A sorted in ascending order and B sorted in descending order. a new array C is made to merge A and B ...

[9 replies] Last: Hi Rinu, C++ provides a standard set of containers for storage and ... (by PanGalactic)

by joeneldeasis

Creating Registry Keys in C

Could anyone help me on how to write registry keys in c? I don't know how to. Please help me. Thanks Guys.

[1 reply] : http://msdn.microsoft.com/en-us/library/ms724875%28VS.85%29.aspx (by guestgulkan)

by shanex88

read write binary/text file

Hi, I have written a program to read from a text file which contain ID and name in this format : 1234567 John Woo 1113456 Kenny Alexis Paton and write...

[no replies]

by enliten

delete and delete []

Hello, I got confused about delete and delete especially about delete . Let's take an example: struct SomeItem { SomeItem(){ ... } ~SomeIte...

[3 replies] Last: Thanks, That really clears the confusion (by enliten)

by Salamu

member function overloading

Hi, I am new to c++ and managed to write this much of code, i dont know what should I write inside of Vehicle and get_line functions. Could you point me how ...

[1 reply] : That would depend on the layout of the file and what you want to read ... (by Zhuge)

by timothyguo

modify the value in pair<>

vector< pair<string, double> > var_map; ...here pushes pairs into var_map... var_map.back().second = 4.3; why can the last line not modify the value ...

[3 replies] Last: Oh! I made a mistake somewhere else. :-( (by timothyguo)

by Hilo890

So there is no way to 'do something' in the Windows console without user input?

I've seen people portray programs they have made as a console program, but it would have moving text, while it waits for the user to input something. Like | t...

[1 reply] : No, it was not. http://stackoverflow.com/questions/199336/print-spi... (by Moschops)

by chnnaveen

Difference b/w sql.h ,sqlapi++.h and msado15.dll

Hi, I want to connect the my ms-access database file from the c++.currently i'm using the msado15.dll using import in VC++ I need to know is their any oth...

[5 replies] Last: SQLAPI++ is a general purpose SQL database access library with support... (by kbw)

by Deadmau6

Calculate average from histogram

// problem solved

[1 reply] : save your scores in the array sum all of the scores of your array and... (by stereoMatching)

by MICHA3L

Using GMP for GARGANTUAN numbers

I need to use long numbers in my factor finding program. I am now aware of header that you can use called GMP that's very precise. So I downloaded it from this ...

[no replies]

by Emir

Design Issue: Derived classes need info about other derived classes

Hello everyone, I've got an interesting situation. There are three classes [named "A", "B" and "C"], all derived from a abstract base class [named "base"]. H...

[9 replies] Last: Yes, I knew that this was the case. I threw in the idea very lightly a... (by simeonz)

by Bezi

Code Efficiency Question

I am wondering if theoretically / practically there is any difference between efficiency and speed of these two codes: MyClass a; for (int i =0; i<N; i++){...

[2 replies] Last: If MyClass has a trivial constructor, copy constructor, assignment o... (by PanGalactic)

by iamuser2007

check my mistakes and tell me please

Hi programmers please check code and tell me my error why is it not showing values on input of some numbers. Write a program in C++ that computes the mini...

[4 replies] Last: not showing correct errors. What? Oxymoron. Double thread http://... (by ne555)

by iamuser2007

find correct answer (c++ program)

Hi please check code and tell me my error Write a program in C++ that computes the minimal and the maximal value of function f(x,y) obtained on an integer p...

[1 reply] : You aren't storing the minimum or maximum value. Looks to me like you'... (by Moschops)

by kaiser0792

Working with File I/O

I'm working on a program that provides a simple telephone directory. I have had it working in different stages of its development and believe that I almost hav...

[3 replies] Last: Use code tags! (by king214)

by teguh123

How do Manipulators work?

http://www.cplusplus.com/reference/iostream/manipulators/oct/ If we do ostringstream os; lalu os << oct; what is oct? What is the type of oct? ...

[5 replies] Last: huh? no. struct manipulator{ virtual ostream& manipulate(ostream&); };... (by hamsterman)

by Browni3141

Speaker output

Is there a library for speaker output? I want to generate custom sound without using a .wav file. I'm hoping to (eventually) experiment with sound generation em...

[7 replies] Last: Yeah but I don't know how to stream your own audio with it. I couldn'... (by Disch)

by jbonello1

Writing text to a textfile

I'm relatively new to C++ and I'm working on the textfile concept now.. I'm having a problem opening textfiles and for some reasong the textfile is not saving i...

[3 replies] Last: i solved it now thanks anyways hehe :) tho i do have another probl... (by jbonello1)

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