[c] Forum Topics

When I mix managed with unmanaged code I get the compiler error: "'IDataObject' : ambiguous symbol". How do I resolve this? Thanks.

Hello I'm trying to test out a random number generator to see how the distribution is and I want to write the values I get from the number generator to a file. Can someone show me in a simple code how to do that, or a good website where I …

I am trying to send and recieve data by using rs232 port.For this i hav even written a program in C language using _bios_serial com,but the problem i am facing is that this command is unable to send the data. Just for testing the port i hav shorted pins 2&3 …

I'm trying to do something like this: [code]public: ULONG dispatch(char *command, size_t length, Stream<T> *stream);[/code]<< moderator edit: fixed code tags >> Where Stream is a template. I can make the class I'm putting it in a template as well - no big deal, I just don't know how anyways. Here's …

this is probably something extremely stupid but I can't fix it no matter what I try :sad: I have a "Service.h" file that looks like this: [code]#ifndef _SERVICE_H__ #define _SERVICE_H__ #include "nm.h" #include "ServiceProvider.h" class Service { public: virtual ULONG register(ServiceProvider *sp); }; #endif[/code] gcc gives me error: /export/home/levk/r2/Service.h:10: error: …

Hi everybody. I am a student taking up C programming and I need some help from you guys. My main problem is that I do not know how to start with programming, aside from that, I would like to know also whoever knows how to understand discrete structures in programming. …

Hey guys, I was just wondering when using classes to obtain a name or something like that when a pointer is used how come you don't have to use the new and delete key words. [code] class LibBook { private: char *name public: LibBook( char* = '\0') void showBookName() }; …

Hello, Im rather new to C, but I was struck with one curiosity as I delve into it. From what I understand, there is not supposed to be any support for string-datatypes in the language itself; you need to import libraries to get this support (where the strings are actually …

hi this is srikanth from india. it would be highly appreciated if a separate forum is put up exclusively for C language.it would be very much useful to beginners. clubbing c and c++ in one forum is a little uncomfortable for the user to browse c related threads.

Below is a program in C that I am trying to use to read in a spreadsheet (in CSV form), which I will eventually be doing calculations on and then writing out to a new file. I'm currently trying to figure out the following three things: 1) How to make …

Hi, all I am trying to compile and run a programme which I got it from a friend. The problem is every time I compile, the error 'graphics header file no found" appear. My question is : 1. Is the graphic header file come together as standard library? bcos I …

I did a search of the forums here and found that there are a number of unanswered questions on this subject and a few that are ambigious. My problem is a bit unique however. I need to know if it is impossible to connect to a database with C++ using …

I am ahving a problem with the do/while loop. When the YesNo function returns a yes, main() repeats;however, it prints out what is stored in the string from before. How do you clear the string in order to run the program over and over. Also, when the piglatin result is …

hi to all.. i need help about C programming i have problem with my project, its about that how to determine the max number using for loop ill give the output and pls give me the code plss Output: Enter Numbers: 5<--input Enter first number:1<--input Enter second number:2<--input Enter third …

Suppose i have a main.cpp file and a test.h file: /////////////////////////////////////////// //main.cpp #include <iostream.h> #include <string.h> void test(); char foo[200]; int main() { strcpy(foo, "testing"); test(); return 0; } ////////////////////////////////////////////////////////////// //test.h void test() { cout << mir << endl; } WHY IS "mir" AN UNDECLARED IDENTIFIER

hello ppl this is my 2nd post and as i said earlier, im writing a cpp program for an exam project. the project is designing a school database system neways the problem is that the the compiler hangs and terminates whenever a wrong type of data is entered i mean …

i need to store the piglatin words returned by each function into one string so that I can then check it for lowercase or uppercase words and change as required. I can't seem to get the return 'temp' to store into a string in main. Also, when printed out, the …

Hi, hmm hav a query right here about how do i go about plotting a map/graph using c programming. i hav the x and y cordinates which are the variables, but do not know how to go about starting/writing the program. i heard one of the ways is to import …

hey can any one give me the information that from where i can get source code of messanger ( sply yahoo) thanks

hi does anyone know how to make a structure globle or is it already? thx, Jason

Hey guys, I was using a switch statement for a menu so when the user entered a number from the menu that action was taken. The last option in the menu when pressed just said thanks for using the program then it would say press any key to continue. Although …

/*intersection ........... */ void Intersection (Queue q,Queue r, Queue &s) { Q_entry x, y; Queue temp; while(!q.empty()) { q.retrieve(x); while(!r.empty()) { r.retrieve(y); if(x==y) s.append(x); r.serve(); temp.append(y); } r = temp; q.serve(); } }

Im having trouble clearing the strg variable in my code, i have tryed cout<<flush(); and <<endl but each time i run the function it concatenates the new data with the old. [code] #include <fstream> #include <iostream> #include <string> using namespace std; int main() { static char str[12], strg[100]; char ismapname[] …

printf("%c was appended to arr\n",*(char*)p); header <stdio.h> i met a lot of this kind of situation.what are these "%d,%c"stand for? is there a detailed list about this? thank you very much!

I need to write a program in C that reads in an english sentence and converts it into piglatin according to 3 rules. All the rules are working correctly; however, it seemes that the program only executes 2 words: the last 2 words in the sentence. Also, since I have …

Can anyone help me convert char to double. Yes, I tried casting, it did not work. Anyway, this is the problem, the variable is declared as type double in the struct(database structure). However, it is defined as type Text in the class I'm modifying. The variable in the class I'm …

hi guyz Am new to Daniweb.I am Vinay Kumar,currently doing 1st year CS in india. I did an intrductory course in computing last sem.I learnt some java. Now I want to learn c seriously. Please help me by suggesting some books,online tutorials etc. Thanking you

How do i convert an int to a const char? also, how do i convert a string to a const char? thanks for all the help.

Hello, I've been working on this random number generator code and got it to work using integer outputs, however I need scientific notation. I read on a site that I can use %E for scientific notation, however I get wierd results that aren't really random, and results that are extremely …

help me in my work .... can any one give me cods on linked stacks... coz i faced alote of proplems... thanxxxx

Hey guys, I was just wondering why when dealing with a lot of classes do you often have to use something like the following code before the class: [code] #ifndef classCarhpp #define classCarhpp [/code] and this code after the class [code] #endif [/code] Thanks in advance.

[code]#include<stdlib.h> #include<stdio.h> #ifndef COMPARE_H #define COMPARE_H using namespace std; int compare(const void* pfirst,const void *psecond); #endif int compare(const void* pfirst,const void *psecond) { const int first=*((const int *) pfirst); const int second=*((const int *) psecond); return(first-second); } void main() { int iarr[10]={9,83,100,1,645,-7654,4,23,543,9}; int j=0; for(;j<10;j++) printf("element %d of iarr is:%d\n",j,iarr[j]); …

is there a data type for a variable to handle as much as 100-digit integer?

I am not sure if this is normal but I am having problems compiling libtiff.Can anybody point me in the right direction .I have followed the instructions from here [url]http://www.cs.wisc.edu/graphics/Courses/cs-638-1999/libtiff_tutorial.htm[/url] but still the compiler is not able to identify tiffio.h . Thanks

Does anyone know if this is possible, and how to do it? Or if there is another way? Cygwin GCC creates PE binaries (i think), I want ELF binaries. Cheers!

Hi there. I want to create a dialog, with a menu ( file, help, edit etc.), and with tabs on the dialog. Basically like the display properties dialog that you get when you right click on your windows desktop, just with a menu added. Also, I want to add dialogs …

Hi I am sahil Is there any one who describe me the use of multidimentional or two dimentional arrays in "C". I need your help .

Hi Narue, Ive started your tutorial on pointers and had a few questions about it if you don't mind. 1) You talked about the fact that a function has an adres itself and that you can call a function threw it's adres. This I understand, as I tried it out …

hello guys, i would like to ask again about this: i am trying to divide two large-digit numbers (up to say 100 digits) using C. I thought of one approach but trying to code it, it seems so complicated... can anyone help me give an algorithm or a code to …

Hi all, i'm coding something similar to a 'http-server', and i'm having problems with sending files to the client (web browser) from the server. instead of the client getting a Save File download box, it just recieves all the assembly code from the file, it gets printed as html text …

Hi, I have to write a program in C programming to plot a sin curve using array. i would appreciate if someone could give me and give me some hints on how about to do that. thanks. :D

Does anyone know if this is possible? //in header struct Output { double *var1; double *var2; double *var3; } //in main std::vector<Output> output(512); and then be able to populate each member of the Output struct in the "output" vector? Something like: for (i = 0; i < 512; i++) { …

is it possible to write a program which will shutdown the remote systme in c?

Hello, for some time I have programmed in java and python, and would now like to enter the C-scene. The only problem is: I'm more or less only interested in C and not C++. And it seems quite tricky getting hold of programming tips and tutorials which apply to c …

i just would like to ask for help regarding my code... my problem is this... the user must enter an 80-digit number...if he enters more than 80 digits, the error "\007Input number must not exceed a total of %d digits\n" will appear setting the iserror flag to 1 and breaking …

Hi, can anybody help me? i am relatively new to C Programming. My question is : How do you create a program which will take a filename as an argument, check whether the file is present and open it (if the file is not present create that file). Thanks -Kartik

hi. [B]question 1:[/B] i am writing a small C script to convert files to another format. in this case i need my script to use [U]all[/U] files in a directory that have extension .htm - how can i do this? the user will manually specify the directory path but then …

[WARNING!] Long Post! [/WARNING!] I have recently got a Pocket PC phone and have managed to cobble together a DLL to display a simple text message on the Today Screen. What I really would like is the time displayed in a large font as I had on my SmartPhone 2002. …

Any tips for compiling templates on visual studio .net 2003? I have code that seems to compile fine on other compilers but am getting an LNK2019 on visual studio .net 2003. I am using template specialization (Dave S. helped me with this a few weeks ago). Before I post any …

Does anyone know how to fix the afxwin1.inl debug assertion error (I get it for line 22 of afxwin1.inl). Google gives me no help.