C / C++ Forum

Hi there, Is there a way to convert a double value to a string. I know that there is fcvt() but I think this function is not a part of the standard library. I want sth from the standard if possible. The thing I am trying to do is to convert a double value to a string with 8 elements. 8 is fixed because of the files I work with. I will...

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hi, i am just trying to implement Iterator pattern in C++, I just stuck up with how to use interfaces, Please help me in how to use interfaces in C++, Can i use abstract base class instead of interfaces? thanks,

Hi, does anybody know, how I can get the serial from a SD-Card under Windows? I´ve tried it with WMI but the serial field of the struct is empty. Regards, Arne

I originally posted the following code in a group discussing threads but after further research I think I have a c question about the code. I know there are a couple of non standard c includes here and the POSIX stuff is non standard but this is how I stumbled onto this question. #include <INTEGRITY.h> #include <stdlib.h> #include...

Hi, can anyone suggest how the compiler will decide which bar() to invoke when we call d.dio()? I am getting the following output: B foo B bar but is there a situation when the same code can print B foo D bar

Hi, The User Interface Community is a new message board for discussions about design, human-computer interactions, patterns, usability... Please have a look at it and let me know what you think. http://community.user-interface.org/ Cheers, Marco

Can anyone tell me where to find the code which these built in functions work on?

Hey everyone! So I'm trying to write a library which mimics the Java API using C++ (http://sf.net/projects/jalp4cpp). I've got some stuff done, but I can't get the following code to work properly: class String; class Exception {

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Hi, Given a map: typedef map<long, string, greater<long> > mapOfFreq; Is there a quicker way to find the rank (i.e. index) of the elememt that has the long value of x? At the moment I'm iterating through the map and keeping count of when I hit it.

I'm working on a simple piece of code under VC++ 6.0. I've got a char Buffer array into which I copy the contents of an MFC control. The string is properly nul terminated. I use strcat (Buffer, "\r\n") to append a carriage return\line feed to the string before outputting it to a display where I can monitor what's being exchanged with...

Which is better for general-purpose programming, C or C++? My friend says C++, but I'm not sure. Please enlighten me. Thanks!!!!!

Hello, I'm taking an independant course in C++, and one of my questions asks to use the following algorithm to deturmine the factors of any given number: -- Initialize a counter at 2 So Long as long as the counter is less than or equal to the number if the counter divides the number evenly display the counter

Hello, can somebody help me with this self written rtrim function? i do always get a access violation on the line where i want to terminate the string: str = '\0'; why can't i acces this specific position? void rtrim(char *str) { for( int i=strlen(str)-1; i>= 0; i-- ) {

Can someone please tell me what I am doing wrong. I wrote this static inline function to test another function and I am getting errors which make no sense to me. thanks Jami /* test2.h */ static inline unsigned int test3(unsigned int aValue)

I wonder how portable the exact width types defined by stdint.h are. I guess target platforms are not required to actually have all those types, right? What happens in that case?

Okay, I guess the answer is "yes". But where can I find it? I was thinking of something like php.net, just for c++. Preferably some documentation that refers to the same standards that the gnu c++ compiler does (I'm using g++ V3.3.5 under Suse Linux 9.3). In this specific case I wanna know the easiest way how to convert an integer into a...

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Hi, I am a student currently working on a project that requires discrete cosine transform program. It would be much better if the program consists of the whole image compression schemes i.e. DCT transform, quantization and coding. Does anyone have any sources on this? I would be grateful if anyone can email me to the above address. Thanks...

Hi I have a problem which result in a "corrupted double-linked list error", I would need some help in trouble shot this one: Here is a stack track: Thread (Suspended: Signal 'SIGABRT' received. Description: Aborted.) 15 __kernel_vsyscall() 0xb7f25402 14 raise() 0x00646118 13 abort() 0x00647888

I have code: std::stringstream sStream; double pi = 3.14159; .... sStream << pi; //????????????? std::str = sStream.str(); //I want str show the scientific format.

Hi everybody, The User Interface Community is a new message board for discussions about design, human-computer interactions, patterns, usability... Please have a look at it and let me know what you think. http://community.user-interface.org/ Cheers, Marco

Why is memory safe that function allocate inner object and return its result? That inner object is destroyed when function come to the "return" statement. Is default copy contructor doing some job? Can somebody explain me what exactly is happening in the following code when it invoke boo myres=calculateSomething(12); #include <iostream>...

I recently inherited some older C code and saw something I haven't really seen before. I noticed it as it fails to compile at my home computer, as it has a newer (4.x vs 3.x ) gcc compiler. Its a private function, inside a function. Something like this. void myFunc(...) { static void myPrivateFunc(...) { }