51,593 Topics
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| | First, yes this is a school project. That said, I have a seed, now I need to create a function that will create a byte array of random bits. The input for the function should be the number of requested random bits. Here's an example: [CODE]unsigned char* getRandomBits (int number);[/CODE] … |
| | hello i am new to this forum i am basically stuck with this programme and i need help....it is a brick game....i want to move the ball and slider at the same time without using threads....i am allowed to use the gotoxy function arrays and pointers thats it can anyone …  |
| | Is there a way to gather network/internet traffic statistics? The end result is that I need to create a random number generator using some network stats as a random seed, so I need to pull information that is highly variable. Could be packet data (maybe sequence numbers), or traffic data … |
| | I am looking for the correct way to initialize an array data member and why the following code produces the listed error. Thanks... [code] typedef struct tagsX { tagsX(int u, int v): a(u), b(v) {} int a ; int b ; } sX ; typedef struct tagsY { tagsY(sX *p, … |
| | Someone help/direct me to understand where I have made the below errors from the build report? [CODE] #include <iostream> using namespace std; int main() { } void "welcome_screen"() { clrscr(); textcolor(RED); gotoxy(10,10); cout<<"**************** W E L C O M E *********************** "; gotoxy(15,12); cout<<"*** T O M A N C … |
| | Hi everybody, I have a simple mathematical member function of a class: [CODE] struct shell { double mc, ms, r0, v0, a0, w; shell(double mc, double ms, double r0, double v0, double w); double absv(double r) const; }; shell::shell(double mc, double ms, double r0, double v0, double w) { this->mc …  |
| | Im having some problems with using the vector pushback method through a structure. The push back method works in one part of the code and not the other. Ive been staring at it for hours and testing different things and i cannot get it to pushback in the section of … |
 | I'm trying to print all .pdf files from a partition using Boost.Filesystem and Boost.Regex but when I run my program, Visual Studio 2010 gives me an Abort error. Here is my code: [code] path Path = "e:\\"; boost::regex reg("*.pdf"); for(recursive_directory_iterator it(Path); it != recursive_directory_iterator(); ++it) { if(boost::regex_search(it->string(), reg)) { cout … |
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| | [code=c] . . string line; vector<string>DataStore; ifstream file; file.open(fileName.c_str()); if (!file.is_open()){ cout<<"Error retrieving file " <<fileName<<endl; } while(getline(file,line)) { getline(file,line); stringstream lineStream(line); string bit; getline(lineStream, bit, ','); getline(lineStream, bit, '\n'); DataStore.push_back(bit); . . [/code] This piece of code takes a CSV and stores its data in a vector. The first … |
| | In Java and c# you can get the total lenght of an array with array.length or simular. Not only the length of the filled elements, I want the length of the total array. Lets say the array is introduced as this. [CODE]string array[100];[/CODE] Maybe its half filled or not it … |
| | I try to get this to work... [CODE] for(int i = 0; i < size; i++){ if(nameList[i] != NULL){ //save name } else cout << "Namelist is full" << endl; } [/CODE] but NULL is not exepted in a situation like this...or...? I want to put in the name in … |
| | I am having problems with finding a solution to update the quantity and list the menu items: ex: if you select Plain eggs at 1.45 each 3 times and coffee at .50 each 2 times it should output: 3 plain eggs $4.35 2 coffee $1.00 I have the total cost … |
| | Create a class Cat with its data members weight & age, each of which defaults to 1. Provide get & set member functions for each data member. Also provide data member functions speak & walk. Both set functions should verify that data members are >0 otherwise set the default value … |
| | So I have the code written, and it is compiling fine. But for some reason, when I compile it and it displays the results, the way it displays isn't the way it should be. It is supposed to pull information in from a binary file. Here is the link to … |
| | I found this function: I would like to use this for my program. [CODE] void gotoxy(int x, int y) { COORD coord; coord.X = x; coord.Y = y; SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord); } [/CODE] First of all, is the "COORD coord" neccesary? :/ and "GetStdHandle(STD_OUTPUT_HANDLE), coord)" What's this part? What does it … |
| | I have a project assignment for school... Basically its coming up with a Windows console C++ .EXE well i have spent a few hours developing a Geometry Calculator.. WOuld anyone be willing to test and report some bugs to me?? This is the project download link: https://sourceforge.net/projects/geocalcrobertdu/ People also wanted …  |
| | Im looking for some real c++ programming challenge...please post the most difficult you have encountered yourself....thanks in advance.... |
| | The program is compiling and I'm not getting any errors, but when I run the program, after I enter the first value, the program just terminates. [CODE]//carstruct.cpp -- Structure with information about cars #include <iostream> using namespace std; struct car {char make[20]; int year;}; int main() { int cars; cout … |
| | I am trying to create a program that, after inputing a text file, can: 1) Count number of lines in the text file. 2) Count number of words in the file. 3) Count number of characters in the file [B][U]including[/U][/B] white spaces. 4) Count number of characters in the file … |
| | My program is due today and I'm stuck at work trying to figure this out I have been using the web to get this done. Instructions: Write a program that adds the positive odd numbers you enter from the keyboard while ignoring the even numbers, and stops when a negative … |
| | Using the stdl::vector class you can use two sorts of iteration over the vector: the .begin and .end way GlifPtrVec_t::iterator Iter ; for (Iter = m_Array.begin() ; Iter != m_Array.end() ; Iter++) { CGlif* pGlif = *Iter ; delete pGlif ; } or one I am more used to: for …  |
| | I feel like I'm spamming you guys for help lately due to my poor internet search abilities... anyway, back and again with yet another question. I'm wondering if there's a simple way to determine how many numbers are after the decimal place. ie: 100.00 has two vs. 100.0 which has … |
| | I've seen some programs made with ncurses, and I think it would be really cool to use it in my project for school. Problem is, I have no idea how it works and can't seem to find much, if even anything, about it. Can someone maybe help me a bit? …  |
| | 1.[CODE]int _tmain(int argc, _TCHAR* argv[])[/CODE] 2.[CODE]wprintf(L" ----------\n");[/CODE] This is syntax that I get when I make any Win32 Console Application in Visual C++. I cannot understand what are _tmain(), argc, _TCHAR* argv[]. Till now I have been dealing with void main() and int main(). I also want to know what … |
| | I have this program and im trying to get the addVertex method to access the list within the class and return the object "Vertex" whenever i use the brackets. Everything works fine but i cant modify the structure now when i use the brackets. I get an error dealing with … |
| | I dont understand how the C/C++ language is portable? 1.) What makes a program compilable on 2 different O/S's? 2.) Doesn't this depend on the O/S manufacturer? How does Microsoft do this? 3.) What determines wether a language is portable or will only work on one operating system?  |
| | Is there ANY EVER reason why i would return an object or variable by reference? to me this doesn't make sense and is very bad. |
| | i have a question where i should place #includes in a file? Here is what i tend to have example.h #include <iostream> #include <string> example.cpp #include <iostream> #include "example.h" ------------------------------------------------ Is This what i want? example.h #include <iostream> #include <string> example.cpp #include "example.h" What should i strive to achieve? 1.) … |
| | I am having trouble on figureing out on how to return more than one value for x and Y. I know you can only have one return statement but i need to return a value for x and y. I am a little lost on how to do this. This … |
 | Hello there forum, After a pretty thorough C++ course I've tried my hands at coding an actual project but have stumbled on a pretty big problem and here I am asking for your help. What I'm trying to make right now is a class which communicates with a gameserver through … |
| | Hello, I've been looking into implementing a simple networking option to a program I'm working on, and have looked around at what my options are. The program is made in Managed C++(.NET), and so far have worked great. Browsing my options, I've found that .NET is also capable of networking, … |
| | log.h [CODE] namespace stuff { class log { .......... friend std::wostream& operator<<( std::wostream& oss, const log& error ); }; } [/CODE] log.cpp [CODE]std::wostream& stuff::operator<<( std::wostream& oss, const stuff::log& error ) { oss << log.m_message; // log.m_message is a std::wstring return oss; } [/CODE] 1>c:\users\oso\documents\visual studio 2010\projects\moduleinjector\moduleinjector\cdllinjection.cpp(147): error C2679: binary '<<' …  |
| | i have written a class to add matrices ,line 51 of the code has problem. debugger is showing segmentation fault there . please suggest the correction. [CODE] #include <iostream> using namespace std; class mat { int row; int column; double **a; public: mat(){} mat(int r,int c) { row = r; … |
| | I need to read data from a file into an array of structs. The info is arranged in the file like so... Spear of Extreme Whaling January 1851 Captain Ahab Each member of the array has a name, month, year, and first and last name of creator. This is the … |
| | Hi guys, Im pretty dam stuck at the moment on an assignment Im meant to do. Its my last question so everything is pretty laid out, but the question (to me is not useful) so if you could just help me out it'd be much appreciated Ok so what i … |
| | Hey, I'm not too sure what the problem is here, I have never had trouble using fscanf before. The following shows the code I use to check the file, and the result. [CODE]while( true ) { int vals_read = fscanf(fileHandle,"%[^;];%s",&name,&pass); if( vals_read == 2 ) { // process the line … |
| | I want to make a simple text program based on the game minesweeper that asks for the number of columns and rows, and asks for the number of mines then create the gameboard with the number of mines scattered throughout on standard output. Any help? |
| | I've been trying to code an array where its size is dynamically allocated. It's been a while since I've coded and so I was wondering if you guys could give me some help? There's also a randomize function that allocates the array with a random set of numbers (the quantity …  |
| | Im a fairly fresh programmer, and I often run into problems like most of us. Most of the time I get it solved in 10 minutes by some google power, but this time Im stuck for real (spent the last 4 hours looking around the web). I first ran into … |
| | Hi, I am trying to understand functions in my C++ class and i was wondering what would be an algorithm to evaluate function and find its maximum and minimum. If someone could explain this to me i would greatly appreciate.  |
| | Problem: Write a program that uses a loop to display the characters for each ASCII code 32 through 127. Display 16 characters on each line with one space between characters. I have tried solving this problem several ways. I either get blank screen or numbers 1-16. Can anyone lend a … |
| | Just when I think I understand this stuff some else crops up to bite me. This part was supposed to be the easy part of the overall project so this does not bode well... What am trying to do is create an array of 32 variables that will be filled … |
| | I realize this is a pretty simple operation, however im totally lost, and no post I could find seem to touch on the exact same subject as mine. I have a text file, where each line is formatted like so: [CODE]float1,float2,float3,float4,float5,float6[/CODE] Each float is separated by a comma. The number … |
| | This is my first time to use the string function. And I met some errors while doing the practice. We now need to input some words, until we input a word with 4 letters. Then the program will show the smallest and the biggest word among our inputs. e.g. Enter … |
 | I am using the free alternative to SPY ++ known as Winspector, and was suggested to start using this to get more familiar with windows and handles and process handles etc... My question here is I notice when I put the crosshair over certain windows I get WINDOWS and a … |
| | Is there a way to create a C++ program to rewrite a query in an optimal form without the use of a database such as storing information in arrays. If so, how? What can I do to implement this. Rewrite SELECT EMPOYEE.EMPNO, POSITION FROM EMPLOYEE E, JOBHISTORY J WHERE E.EMPNO …  |
| | I am building a dll file. when i try to compile the dll file i get the following errors... help me am new to vc++... tool used is visual studio 6.0 GPPSCOM.OBJ : error LNK2001: unresolved external symbol "double __cdecl RoundDown(double,int)" (?RoundDown@@YANNH@Z) GPPSCOM.OBJ : error LNK2001: unresolved external symbol "double … |
| | How can I check that the user actually is inputting what I want them to? (For example letters or numbers); I need the user to input y or n, so here is how i tried to solve it: [CODE] char answer; do { system("cls"); cout <<"Want to play? <y/n>: "; …  |
| | [code] class complex { int real; int imag; public: complex(){}//why default constructor is always needed complex(int a,int b){real = a;imag = b;}// why can't we define only this constructor ~complex(){} }; [/code] |
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