C / C++ Forum

Hi, I haven't done a lot of C++ programming (done a lot of it in C) and the reason why I'm considering switching now is also the question I'm posting here. I have some library functions that return to me a void* to data that has been specifed by the user. There are also functions that return an enum which contains information about the...

Hi, My platform has 32 bit words, and an `unsigned int' corresponds to 32 bits. Also an `unsigned long long' corresponds to 64 bits. If I declare a type of `unsigned long long', can I assume that my compiler would correctly interpret any operation I do on this type if I visualise it as if it's the native word size? I guess that's the...

Hi, I am trying to write a bit of code to iterate through memory addresses and if the address is divisable by 2 then write one byte, if not write a different byte. I am having trouble with the pointer to the address incremented by for loop. unsigned long i; for(i=0xB8000; i<0xC0000; i++)

Dear all, Kindy help to convert the char* ( LPCSTR) to WCHAR*(LPCWSTR). Would be great if you tell if any function does this job in VC++. Quick response will be greatfull...as its blocked... Thanks, Sweety

Which is better for general-purpose programming, C or C++? My friend says C++, but I'm not sure. Please enlighten me. Thanks!!!!! PS I believe the folks over at comp.lang.c++ could add something to this.

Hi, I am probably asking for something which was discussed several times, but all my researches were unsucessfull. If you look at this code (simplified part of my project): --------------- template< int dimension > struct Test {

Hi I have a char p, I'd like to print out the lower 4 bits and higher 4 bits of p seperately how can i do that? Thanks a lot!

I apologize for this OT posting. I've read the FAQs and the Etiquette comments, so I know that this post is a probably a No, No. I even looked at the <misc.jobs.offered.entry> newsgroup, but that didn't seem to be the right place either. In any case - I'm looking for two or three programmers (hobbyists) that are past the beginner stage...

I'm working on some legacy code and came across something like this. Anybody know exactly what the ramifications are to the memory if you do something like this: int somefunction (some arguments) { .... Mystructtype mystruct;

I have a string the length is 0. I got it from strlen(TE); however, if I use if(TE!=NULL) { }

Hello, I would like to call a C++ programm out of Java with help of JNI. By the followed command I created a "shared library": g++ -shared -o libcalculate.so rechner.cpp When I create an object from the existing program inside a method of my class rechner.cpp, and then call the method out of java, a following

Can you help me figure out why this integer printing program won't compile? I've looked far and wide in my diagnostics to figure out why, but I'm lost. Here's the code: #include <iostream> #include <cstdlib> using namespace std; template<int I> class _name

Hi everyone I have a problem. I compiled hello wold progarm under unix (solaris 9 workstation) and it compiled fine using c++ compiler but when I try to execute it it gives me this error messgae: ld.so.1: ./a.out: fatal: libstdc++.so.2.10.0: open failed: No such file or directory Killed I know that the libstdc++ is not in the default...

Hello, I have a question concerning the template classes and their parameters. Is it possible to set a condition on the template parameters in a way that could block the compilation if the condition isn't true? (e.g. by throwing an error message to the compiler). And is it possible to use this type of condition to make the compiler choose...

Dear all, I'm running a trace analyzer over a large trace file(several gig hz). However it stopped in the middle. I got the call stack from the gdb. I wonder if anyone could figure out the reason of this SIGABRT? About to run ./tracer_21Feb2006 ammp.loop_bounds.trace ammp.mem_ops.trace Using host libthread_db library...

hi, how can i use the object as the parameter of the method, in the body of a class in which the method is defined ? example: assume i've got a class imaginary_number, and one of the methods is imgaginary_number::add(imaginary_number a, imaginary_number b) how could this be done ?

Hi, I'm using a map with the key of type string, and value of type int. typedef map<string, int, less<string> >concordance; I'm finding words within some text and keeping a count of their frequency.

Hi, I have a dll and one of its exported function is suppossed to return a pointer to an object. How can i check whether the exported function is of the same prototype i want. Please comment

Hi, I have defined this class to hold configuration for each field of a message: class field { public: int fieldno; std::string name; rtypes type;

Hi, I have a very simple library that wraps a Timer class and a test program linked to it. First of all, I compile the library and the main without the KPIC flag. Then, I execute the program and, while it's running, I add some dummy sentence to the library and recompile it. Nothing happens to the binary running. It keep unaware of...

Can anybody explain me what is control and data coupling with respect to C code? Also, how to do control and data coupling analysis?

Hi! I have seen in a couple of libraries that object are never passed through dll boundary, instead the results are returned through an output parameter reference like: void f(std::string &s) { s = "foo"; }

hi , I am not sure but I think it might be to avoid heap fragmentation due to several malloc calls. Are there any strong reason ? What are the other things that should take care when we implement a memory manager , like i) garabage collector kind of thing , ii) Safe Free of pointer in wrapper of Free functions etc . Thanks Uday

Hi all, I want to calculate a time of any routine in micro second.I know there is a function utime.h in the programming linux.But I'm using a OS Windows. If somebody know the soluction, let me know, please. Thanks!!

Hi there! I've been having a lot of difficult trying to figure out a way to convert a terminated char array to a system::string for use in Visual C++ .NET 2003. This is necessary because I have some legcay C code that needs to process a string taken from a textbox, then I need to re-display the string as the textbox->Text. I easily found...