51,593 Topics
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| | I have an assignment where I really have no idea how to even begin. It is as follows: •Create a destructor that prints a message before exiting. •Create a new function called void incrementMinutes( Time &, const int ); That increments the minutes by count. • create a member function … |
| | Hello, I made the following code based on the following physics problem: "A sphere of metal has a radius of 6.7 cm and a density of 9.27 g/cm^3. What's the mass of the sphere?". The program runs error-free, except that it gives me a result (mass) of 8758.99 grams. The … |
| | How would I convert a string to an integer? I found a method online, but I don't really know how it works. The method is subtracting the character '0' from the character. Supposedly, this makes it an array, but I do not know why. Can anyone explain why? And are … |
| | Hey, I am starting to work with SDL and I had it all set up correctly etc. The thing that does not seem to be working correctly is the SDL_ttf. Now, As far as I am aware, linux builds don't use truetype, which is why I am at a loss … |
| | Hi friends, I need very urgent Turkish-English dictionary program code (university project) Would help please. |
 | I am making a screensaver and it won't build! The error I get is "undefined reference to '_SDL_main'. Here is my code: [CODE]#include <windows.h> #include <scrnsave.h> BOOL WINAPI ScreenSaverConfigureDialog(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) { system("TMXDB.exe"); return true; } BOOL WINAPI RegisterDialogClasses(HANDLE hmodule) { return true; } int … |
| | In my project I tried to use boost RNG in such manner [CODE] inline int rand(const int m){ uniform_smallint<> us(0,m-1); variate_generator<rnggen_t&,uniform_smallint<> > vg(rng,us); return vg(); }[/CODE] where rnggen_t is type of random number generator (rng). But using this (for every generator) instead of rand()%m, is slowing my program at least … |
| | Is there a way to detour a class method to a static function by passing the implicit "this" manually? I'm specifically trying to detour endscene, i've done it with a class member, and writing the address to the new class member into the vtable, but i'm trying to see if … |
| | I have typed the following program from [I]Learning OpenCV[/I] book: [CODE] #include "highgui.h" int main(int argc, char *argv[]) { IplImage *img = cvLoadImage(argv[1]); cvNamedWindow("Example1", CV_WINDOW_AUTOSIZE); cvShowImage("Example1", img); cvWaitKey(0); cvReleaseImage(&img); cvDestroyWindow("Example1"); } [/CODE] When I try to build it using `Eclipse CDT`, I get the following (Any ideas?): [CODE] **** Build … |
| | I would like to be able convert one format to another(not immediately but eventually),know how to use tree and hash tables and linked lists properly using classes. I want to be able to do a basic graphic user interface and use pointers well. I've heard of the following books: Exceptional …  |
| | Hi whenever I compile my program, I am getting this as a a error. well.cpp: In function âvoid printmaze(CELL (*)[20], std::string)â: well.cpp:234: error: a function-definition is not allowed here before â{â token well.cpp:416: error: expected `}' at end of input well.cpp:416: error: expected `}' at end of input well.cpp:416: error: … |
| | Here is my piece of code: [CODE] int b[2][2] = { {4,6}, {-3,0} }; int b_length = (sizeof b)/sizeof(int); int *sub_b = b[1];[/CODE] b_length will have the length of 2-D array b (4, in this case). now sub_b is the sub-array of b at row 1, which is {-3,0} Is … |
| | Hi, i'm a newbie, and i have a trouble with a program. The program doesn't work as i desire. This is a little fragment of my program: [code=c] //Requesting data from users. cout<<"\n\nEnter your last name:\n\t"; getline(cin,flast); cout<<"\nEnter your mother's maiden last name:\n\t"; getline(cin,mlast); cout<<"\nEnter your first name:\n\t"; getline(cin,name); [/code] …  |
| | Hi All. I have developed a cgi script in C/C++ to dynamically create PDF forms with data filled in from an Oracle database. To do this I used PDFlib (version 7.0.1). The submit button on the form submits a FDF file to the server where it is saved via another … |
| | I am finishing up a program and have a few issues. I get the following error twice in the program... error C2664: 'CreateFileW' : cannot convert parameter 1 from 'char *' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast Can someone please … |
 | Hi, I am doing a C++ self-study and I got stuck with this problem. I want to have a code that asks the suer to enter two numbers and then it lists the numbers between these two numbers. It has also to print a message if these two numbers are … |
| | ı have problem with this program because ı want cin>> number; int count[number]={0}; ... .. .. for ( ............ ) count[b]=count[b] +1; ı could not such a segment in my program. my aim is that for each entered number , ı will count something ı want to learn this. devc++ … |
| | Hello I need some help as to the limitations or flexibility of header files. I have written a code that updates a base folder when it is compared to its newer version. I have hit on a roadblock though. If a new file is added to the folder, the program …  |
| | Hi. Got some newbee questions for the masters of C# =P Im trying to build a small ROV. iv used Python and the joystick sketches u can find on the internet. But i want a GUI that shows feedback from the ROV and output info like "lights on/off" and thruster … |
| | Hi everybody, i cant seem to make my program to pass the first user input. I know i have to put it inside a do while loop, but everyone of my attempts results in an infinite loop. I'm also aware that i should use a bool to make it work, … |
| | Hi, I am doing Question 4 of the Project Euler puzzles. I wrote some code which is supposed to find the biggest palindrome from the product of 2 numbers. However, this always prints out 900099. I cannot really find any errors in this code, but if you do, please let … |
| | How do you pass an unknown object into a function and save it? I'm trying to have a set and get function in a class I'm creating that can hold and return any object. Here are my attempts so far: [CODE] void* holder; void setHolder(void* object) { holder = object; … |
| | #1. Add functionality to store the guesses the user makes in an array up to a maximum number of guesses stored in a constant. #2. Display the list of guesses after the correct guess has been made. #3. The list will be stored in an array of objects from a … |
| | Hello.. I have a bit of a situation here. I am trying to work with OpenSG. I downloaded the package and installed it as it was instructed in the INSTALL file. Then i installed its system dependent libraries as well. Now i tried to build its tutorial and it shows … |
| | Can I ask what the programing languege used in iOS? I heard it was Xcode but I'm not 100% what that is, lol if anyone can give me a hand it would be great. Also (and I know this is kind of a supid queston) can you use and C++ …  |
| | [CODE] template <class T> class Llist //.... //Iterates to position and sets pointers to node at position-1 and position. template <class T> void LList<T>::iterate(Node<T>*& previous, Node<T>*& next, unsigned short pos) { //some code } //Start Iterator template <class T> inline Iterator<T> LList<T>::start() { //some code } template <class T> class … |
| | In the last chapter of my book we implemented a simplified version of the vector class In the chapter I'm studying now we're implementing a simplified version of the string class ... which uses my version of the vector class (called Vec) to hold chars. [CODE]Str(const char* cp) { std::copy(cp, … |
| | In a unix pthreads based app I'm working on, I have objects of a particular class (call it class foo) being created in multiple threads. I need a specific public method of class foo invoked at or after 60 seconds of the object coming into existence (it is not imperative … |
| | So I am having trouble with the most popular error ever, memory access violation. To make a long story short I am dabbling with an old program I once wrote, it's main purpose is to parse some stuff and download some files. (It's too huge all in all so I … |
| | hey I am new in C++ and I have finished my code but my Prof. asked me to write pseudocode and I have no idea what that is and I dont know how to write it. Can somebody give me some example how to write pseudocde from this code. [CODE]//This … |
| | so heres the problem, i have been working on this asteroids game for a week or so now but i cannot for the life of me figure out how to work the direction properly. at the moment the only thing the ship does is move up the screen. The functions … |
| | Hello, I have this assignment I'm supposed to deliver tomorrow, I have most of it figured out, but there are certain bits and parts of the question I can't figure out... I'll show you what I mean, here's the entire question: [CODE]Develop two linked lists to manage the list of …  |
 | The application has a screen size and resolution problem . What should be done since it looks very funny on desktops . |
| | I am working on making a 'safetype' abstract class, which will have a complete set of pure virtual operator overloads to help make sure that a class inherited from it is safe to pass to virtual any function. The problem is that I don't know the syntax of a pure … |
| | I'm learning C++ and just finished a tutorial on pointers. I understood what they were and how to use them but I do not understand when they should be used. When would it be practical to use a pointer to get a value instead of using the value's name? For … |
| | I am a humble programmer who is about to lose his remaining sanity at trying to get FTGL and/or FreeType working with Visual Studio 2010. FTGL is version 2.1.2 and FreeType is version 2.4.4. Inside of the project directory I have freetype.dll and ftgl_dynamic_MT_d.dll, and I have linked to the … |
| | Well I am coding a small intermediate program to help me with learning c++ , and i am wondering how to check for blank input to cin >> string heres what i have [CODE]string name; cout << "Enter You're Name: "; getline(cin, name); [/CODE] and if i just hit enter … |
| | I am working on making an error header file and this is what I have: [CODE]#include <stdio.h> #include <stdlib.h> #include <iostream> #include <sstream> #include <string> #define VANARGS(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,n13,n14,n15,n16,n17,n18,n19,n20,n21,n22,n23,n24,n25,n26,n27,n28,n29,n30,n31,n32,n33,n34,n35,n36,n37,n38,n39,n40,n41,n42,n43,n44,n45,n46,n47,n48,n49,n50,n51,n52,n53,n54,n55,n56,n57,n58,n59,n60,n61,n62,n63,N,...) N #define __VA_NARGS__(...) (VANARGS(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)) #define ERROR(...) (\ (__VA_NARGS__(__VA_ARGS__)==0)?"NONE":(\ (__VA_NARGS__(__VA_ARGS__)==1)?(_1(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==2)?(_2(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==3)?(_3(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==4)?(_4(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==5)?(_5(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==6)?(_6(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==7)?(_7(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==8)?(_8(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==9)?(_9(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==10)?(_10(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==11)?(_11(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==12)?(_12(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==13)?(_13(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==14)?(_14(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ (__VA_NARGS__(__VA_ARGS__)==15)?(_15(__VA_ARGS__,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)):(\ … |
| | I noticed that using a switch statement, the case always has to be a constant character or integer or it won't compile. It's sorta of a bummer as the only alternative is using a bunch of if/else if's. So doing something like this won't work: [CODE]switch(aString) { case "word1": doSomething(); …  |
| | I try to make an exercise that involves classes. I reached until this point [CODE] #include <iostream> #include<math.h> #include<iomanip> #include<conio.h> using namespace std; class Cplx { double re, im; public: //constructors Cplx(double x=0, double y=0); Cplx(const Cplx& z); //accessing the members double real() const {return re;} double imag() const {return … |
 | I've been having a hard time understanding classes but i've got it mostly down(atleast I think) well below in the code I overloaded the + operator for my class called clr which uses strings, my problem is on lines 59 and 61(strcpy_s(tmp,len,other.buffer);) when I strcpy to tmp the word is … |
 | Hi, I'm looking for a good book on Qt 4 programming, I checked both chapters and amazon but couldn't locate a Qt book with favorable reviews and was wondering if the daniweb members knew of a good text...Thanks in advance. Gerard4143 |
 | My professor has thrown me a curve ball with this next assignment. The assignment is to make a Monthly Accounting Statement, the program is to you structs and arrays. I get how you can have an array of structs, arrays within a struct, etc... I have the program mapped out …  |
| | 3 months ago me and my classmates played with visual c++ 6.0. We made a infinite loop of numbers that kinda looks like the matrix thing. We changed the font of the cmd of c++ to green. Now the problem is I can't turn it back to normal. I tried …  |
| | Input text file as an array? For example if the text file contained something like //names and grades Bob 98 92 66 90 Sara 88 75 39 85 Joe 92 99 99 12 Would it be correct to do [CODE] #include <iostream> #include <fstream> #include <string> using namespace std; void … |
| | [code=c] void Assembler :: pass2(ifstream &inHandle, ofstream &outHandle) { outHandle<<setfill('0'); while(!inHandle.eof()) { inHandle.getline(src_line,50); //declerative or imperative statement if(toascii(src_line[0])>=48 && toascii(src_line[0])<=57) { breakStatement(); outHandle<<address<<")\t+ "<<mnemonicCode<<" "<<regCode<<" "<<setw(3)<<operand<<"\n"; } else outHandle<<"\n"; } } void Assembler :: breakStatement() { int i=0,j=0; char oprCode[20],oprClass; ifstream in; //initializing all variables strcpy(address,NULL); strcpy(mnemonicClass,NULL); strcpy(mnemonicCode,NULL); init(oprCode); regCode='0'; … |
| | I am making basic project for "Computer simulations of polymers and biopolymers" using Monte Carlo simulation and I currently have access only to ASUS eee PC netbook. Could anyone run attached program on a faster hardware for input data [ICODE]100 50 50 1000000[/ICODE]. Last part of data is number of … |
| | Can anyone please give me a guideline on how to code the following? I have an MFC application which should call on a timer basis a python script from command line and read the ouput of that command line. I thought of using CreateProcess, but i have no clue of … |
| | I try to make an exercise from a book and I have only one error. On this line [CODE]cin >> t;[/CODE] it writes me that "more than one operator >> matches this operand" I know that defined this operand before in another way but I don't know how to solve … |
| | I have two files; one with places then the distance between them. Example: Moffat Carlisle 65 Doncaster Hull 76 Northampton Birmingham 90 Leicester Lincoln 82 Sheffield Birmingham 122 I was wanting to use dijkstra's method, but i seem to have a problem because looking pseudo codes to understand it they … |
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