51,593 Topics
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| | People. As i have my course of Object Oriented Programming, thus my Final project is to make a game in c++ using allegro. Please provide me basic knowledge because i have no idea of using allegro and game development. i would also be needing some good and easy game ideas … |
 | This is my first time with link lists. I have gotten it to pull the first bit of information into the first node, and it prints out fine after that into the console window. When I try to add additional lists and link them, and then try to print them …  |
| | Hello! I'm trying to modify opensourced application but due to lack of knowledge, I'm stuck. Explantions are in the comments of the app :-) Thanks in adavance for your support! [CODE]void CBaseGame :: FixSlots( ) { struct Struct1{ list<string> UserList; list<CGameSlot> PlayerSlots; }; list<string>::iterator IT; list<CGameSlot>::iterator TI; for( vector<CGamePlayer *> …  |
| | Hi all, I have a programming assignment to store sparse matrices using a list<list <myclass> >. I have pretty much everything nailed down but I'm going wrong at some point, the output is incorrect. Instead of giving me 4 lines with the column position and value of non zero values … |
| | [CODE]#include <stdlib.h> #include <iostream> #include <cstring> #include <string> /* Include directly the different headers from cppconn/ and mysql_driver.h + mysql_util.h (and mysql_connection.h). This will reduce your build time! */ #include "mysql_connection.h" #include <cppconn/driver.h> #include <cppconn/exception.h> #include <cppconn/resultset.h> #include <cppconn/statement.h> using namespace std; int main(void) { sql::Driver *driver; sql::Connection *con; sql::Statement …  |
 | I've found that often in my code I have a need for primitive variables protected with synchronization objects such as a boost::mutex, and I was wondering if the boost library provides a template similar to this one I'm considering, based on the C# property methods get/set: [code] template<typename var_type> class … |
| | hello, I am building an application where I have two integers and I have to add them or multiply. I have to use a function to add/multiply this two numbers and call it from the main. I have done this so far. [CODE] int main() { int user_choice; int num1; … |
| | Hello everyone. I am having hard times in dealing with this problem which I've been given. It simply asks me to shift an array K positions without using additional memory. I cannot ask them what they mean by that. No memory, like... not even using a temporary variable for the … |
| | Hi, I am in process of creating a Money class, as per requirement I am suppose to represent each denomination by a class(eg: $5Class, $10Class etc.). I want to use inheritance in this scenario. I cannot think of the class design. I was able to create a class design for …  |
| | I need help in pulling this program apart, and reformatting it to use functions that I didn't know i needed to implement until right now. * float calculate_time (4 parameters) finds the amount of hours between two times given. It should return 0 if the amount is less than 0. …  |
| | one way to eveluate a prefix expression is to use queue. to eveluate the expression scan it repeatedly untill you know the final expression value, read it repeatedly untill you know the final expression value. in each scan replace an operator followed by two operands by the calculated value. for …  |
| | Dear friends: I wrote the following c++ codes to create a series of filenames as "iteration number.dat". [CODE]#include <iostream> #include<string> #include<sstream> using namespace std; int main() { string outbuffer; ostringstream outs(outbuffer); for (int i=0;i<5;i++) { outs<<i<<".dat"; cout<<outs.str()<<endl; } cout<<outbuffer; return 0; } [/CODE] I tried to use the ostringstream to … |
| | Hey Just thought I might post some code I've Been refining its not really useful but it shows (sort of) how to print formatted text if you have any suggestions please I've almost got the kinks out weird numbers will cause it to output weird. But if you throw 9 … |
| | What wrong with my coding? when i run..nothing appear.. The output should be: Perimeter of Rectangle 1: 22 Perimeter of Rectangle 2: 6 Perimeter of Rectangle 3: 18 Perimeter of Rectangle 4: 4 [CODE]#include<iostream> using namespace std; const int TOTAL= 4; void CalculatePerimeter(int perimeter[], int width[], int height[]); //const int …  |
| | //Enter phone number: 1-800-COL-LECT //1-800-265-5328 Im trying to input the dash right after COL and before LECT. Please help [CODE]#include <stdio.h> #include <stdlib.h> #include <math.h> int main() { char ch; printf("Enter Phrase\n"); while((ch=getchar())!='\n') { if ((ch=='1')) printf("1-800-"); else if((ch=='A')||(ch=='B')||(ch=='C')) printf("2"); else if ((ch=='D')||(ch=='E')||(ch=='F')) printf("3"); else if ((ch=='G')||(ch=='H')||(ch=='I')) printf("4"); else if … |
| | Hello, im currently using this kind of Hotkey : [CODE] if(GetAsyncKeyState(VK_F1)) { if (this->checkBox1->Checked == false) { this->checkBox1->Checked = true; } else { this->checkBox1->Checked = false; } }[/CODE] But its not very good. I couldn't find a better way to do this :/ (im using Visual Studio 2008) Anybody knows … |
| | ok so for some reason its telling me my "else" has no matching "if" in line 51, i have to make it so the binary output is spaced which im pretty sure i did and has to have a separate output if the character length is more than 8 [CODE]#include<iostream> …  |
| | [CODE] #include<iostream> using namespace std; char* Invert(char* input,int start,int end); char* reversewords(char* current); int main(){ char inputstr[] = "London is a city"; cout << "Inverted string : " << Invert(inputstr,0,strlen(inputstr)) << endl; int start,end ,i; while(*inputstr){ if (*inputstr == ' ' || *inputstr == '\0') { Invert(inputstr,start,end); start = i+1; … |
| | Hey everyone, I'm new to the site, this site returned the most results when trying to look for relevant information so here i am. I have seen people write questions to assignments on here without trying expecting people to answer the assignment question. And ive also seen people steal code … |
| | Hey guys I am a noob when it comes to this stuff. I go to college for electrical engineering and me and my professor were discussing a cool senior project. There are regular vending machines in most buildings of the school that are connected to the schools network. The ethernet … |
| | I've download this following program source from a SVN repository.. [url]http://blanddns.no-ip.org:81/repos/public-smart/[/url] How do I compile it?? I've tried but it has c++ and java files included in it.. and some are even in separate folders. Can someone tell me how? Do I have to do command line? Do I need … |
| | I don't understand what I am doing wrong here. I am trying to quickly write this program so that I can use it to test a flowchart diagram that I made earlier. When the output comes up on the console "Enter a course name" and I put any input in … |
| | I want to update information i previously stored on a file but cannt do. My code is[CODE]//----------------------------- //--------------------------------"s"-Structure created-------------------- struct student { char regno[20]; //----------------------Pinfo var------------------ char name[50],gender[7],dob[20],otno[20],colg[50],branch[20],hno[10]; int rno; //----------------------Einfo var------------------ char doj[10]; float teage,twage; //----------------------Painfo var----------------- char fname[20],occ[50],ladd[100],cadd[100],ftno[20]; //----------------------Payinfo var---------------- char payj[200],dues[200],smoney[200],mode[20]; //----------------------Remarks var---------------- char remark[900]; //----------------------Marks var------------------ … |
| | I am learning c++ now and have encountered a problem in trying to create single digit addition, multiplication and subtraction math questions. The numbers used in the questions are randomly generated from 1 to 9 and when I try to print the answer for the corresponding question, I get a …  |
| | Dear friends: I have a sparce matrix , and i want to write the matrix pattern to a postscripte file. Could you please told me how to write a postscripte file with c++ . Regards |
| | So i'm making this periodic table kinda program here mainly outta boredom. But I came across a problem, when I type in the name for the element, the program just closes. Any ideas on how to get it to work properly. Here's my current code. [CODE]#include <iostream> #include <windows.h> #include … |
| | [CODE]#define WIN32_LBAN_AND_MBAN #include <windows.h> LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam); int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) { WNDCLASSEX windowClass; ZeroMemory(&windowClass, sizeof(WNDCLASSEX)); windowClass.cbSize = sizeof(WNDCLASSEX); windowClass.style = CS_HREDRAW | CS_VREDRAW; windowClass.lpfnWndProc = (WNDPROC)WindowProc; windowClass.hInstance = hInstance; windowClass.hCursor = LoadCursor(NULL, IDC_ARROW); windowClass.hbrBackground = (HBRUSH)COLOR_WINDOW; … |
| | I don't understand how it works. What are lines 19-33 doing exactly? Why did they do "arraySize = obj.arraySize;" ? [CODE]#include <iostream> #include <iomanip> using namespace std; class NumberArray { private: double *aPtr; int arraySize; public: NumberArray(NumberArray &); NumberArray(int size, double value); ~NumberArray() { if (arraySize > 0) delete [] … |
| | Hi! I am supposed to only use the "procedural fragment of C++", i.e. no object-oriented programming (like cin, cout etc). Vectors are not allowed either. So, one of my goals is to count the number of lines in a text file (let's call it train1.in) which contains data like: [ICODE] … |
| | Dear friends: I download a Matrix library "MET" from [url]http://met.sourceforge.net/[/url]. I want to compile it under windows system. I download the MinGw. when i excute the following command, it give the me the following errors: [CODE]G:\met>make g++ -Icommon -o xpr1Test xpr1Test.C -lm In file included from vecmat.h:35:0, from xpr1Test.C:6: xpr1.h:31:22: … |
| | the letter e is the most frequently used letter in the english language, and the letter z is the lease used. a friend of yours doing a blah blah believes that this may not be necessarily be true of writings of first year college students. to test his theory, he … |
| | Hi i am trying to write a program where the user inputs a list of space separated words (more than ten are required); the program then reverses and prints the order of the words. Example: input:“Extra Credit Programs”; output: “Programs Credit Extra” but my program s far is not behaving … |
| | The issue is that it doesn't seem as though the code isn't getting past the 3rd if-else statement, and even if the input is correct it will say invalid times and set the values to 0. I can't tell what the problem is. [CODE]#include <iostream> #include <string> using namespace std; … |
 | i created a new project, added some textboxes and labels with one button. when i built the project the first time, i just got the error: general error c101008d: Failed to write the updated manifest to the resource of file "..\Debug\Login.exe". Access is denied. mt.exe Login someone help me please! |
| | Hi, what does this error mean? : error C2440: 'initializing' : cannot convert from 'char' to 'const char *' i'm trying to read an image from a file using this code: [COLOR="Green"]#include "itkImage.h" #include "itkImageFileReader.h" int main( int , char * argv) { typedef unsigned char PixelType; const unsigned int … |
| | Hye..i dont know how to output the position for array. [QUOTE] Enter value for array A(4x5): 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 Enter value for array B(4x5): 1 2 3 4 5 1 2 3 4 …  |
| | hi I m new here and not sure about how things go about... but could any one tell me about collaborations of objects in c++  |
| | I'd like to know: 1.) On line of code which says: "Production possibleExpansion(infile);", what is the nature of possibleExpansion(infile)? Is it a function? Is it an object of class Production? 2.) On line of code which says: "possibleExpansions.push_back(possibleExpansion);", what is the meaning of it? [CODE]#include "definition.h" #include "random.h" Definition::Definition(ifstream& infile) … |
| | The CashAndCreditShop supermarket determines the retail price of a product based on the time it is expected to stay on the shelf. Any item that is expected to sell in one week or less is marked up 10%, and any item that is expected to stay on the shelf for … |
| | I'm running a structural analysis program in VS2010 which iterates through a loop up to 4000 times. The program keeps breaking on me around the 960th loop and gives the following error Unhandled exception at 0x0040cd1d in Structural Analysis Program.exe: 0xC000005: Access violation writing location 0x00000000. The error seems to … |
 | I have made a header file with a templated dynamic array class that I wish to convert into secure code. The problem is that since all of the code relies on the Template I cannot put it into a static library. Any ideas how I could still make the source … |
| | Need help converting from hex to binary any help is very appreciated!! [CODE]#include <string> #include <iostream> class Hex { private: //constructor std::string hexNumber; int decNumber; public: Hex(std::string hNum): hexNumber(hNum) {} Hex(int dNum): decNumber(dNum) {} ~Hex(); int toInt(); std::string toBin(); std::string toHex(); }; [/CODE] it keeps saying i need to put … |
| | Hey everyone.. I need some help writing code for c++ to make a plot. I think im suppose to use an array but im lost after that. The plots are suppose to look like the pictures in the link and the points come from a data file that im reading … |
| | [CODE]#include <iostream> using namespace std; int main() { double firstNo;// first number is stored here double secondNo; double result;//variable for result when first and second number are operated upon char operation;// place to store the user's inputed operation // asks the user to choose the first number cout<< "Enter in … |
| | I'm looking for the best way to make a method available to a sub class (not talking inheritance, polymorphism at all, just standalone classes!) without handing down a million pointers to each sub class. [code] Class A; // contains many instances of other classes. Class Z; // one of those … |
| | Hello, I'm working on a simple winsock2 messaging program with a client and a server. The server, which uses the same code as the client, save for some preprocessor directives, compiles fine, but the client throws up 3 unresovled external symbol errors: Error 1 error LNK2019: unresolved external symbol "public: … |
| | Hi there, I am a Delphi guy and I am a bit new to C++. I have this annoying error when I try to compile and I have no idea how to solve this: [B]error: request for member ‘GetVector’ in ‘gff’, which is of non-class type ‘TGff_File*’[/B] on line #20 … |
| | please help me with this i run a borland c++ 5.02, when i try to run this piece of code #include <windows.h> int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MessageBox(NULL, "\tHello World!", "My first windows app", NULL); return 0; } i am getting an `unresolved external … |
| | This question has been bothering me all day. if I'm trying to pull out all strings that are in a txt file and all start with "abcde" is there anyway to find them, and copy the strings?? assuming the txt file contains lots of text |
| | Hi! I’ve been working on a project using C++ and I’m facing some difficulties. I have to write a user system consisting of two classes. One class “Account” with the parameters: Balance, password and username. Account management will contain functions for operating on the balance and for reading/writing the account … |
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