51,593 Topics
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| | I have typed this many ways into dev-c++ trying to figure out how to figure out the output but it always comes back with errors no matter what headers I have used and other things. Can anyone give me some ideas? I don't want the answer, just ideas on how …  |
| | i dont know what happen..when i complie..there's error... so..what suppose i do??please.. [CODE]#include<dfp.h> CMatrix CDfp::operator()(double(*p)(CMatrix&),CMatrix& X0,double e) { pfun=p,n=X0.getrow(); X.set(n,1),S.set(n,1); X=X0, error=e; CMatrix B(n,n),B0(n,n); CMatrix TiDu(n,1),TiDu0(n,1); CMatrix DG(n,1),DGT(1,n),DX(n,1),DXT(1,n); CMatrix E(n,n); CDiffer differ; double a; double dfm; int flag(0); int k(1),c(1); for(int i=1;i<=n;i++) B(i,i)=1; B0=B; TiDu=differ(pfun,X,error/10); dfm=TiDu.getmod(); ofstream out(".//result.txt",ios::ate); for(k;k<=n;k++) { … |
| | Hi guys, I'm still new to C++ and get confused by the codes below.. [CODE]class FLATMATE { string name; public: FLATMATE() { name = "";} FLATMATE(string n){name = n;} string getName(){return name;} void setResident(string n){name = n;} };[/CODE] [CODE]class DUTY { FLATMATE resident; //name of the flatmate int RequestOffer; //amount … |
| | Could you please have a look at the code and tell me the reason why it is giving me an error? [code] int timeDiff(std::string startDateTime, std::string endDateTime) { std::string strtYYYY, strtMM, strtDD, endYYYY, endMM, endDD; int strtY, strtM, strtD, endY, endM, endD; strtYYYY = startDateTime.substr (0, 4); cout << "String … |
| | I recently had an assignment for an advanced coding class where I was to create a Binary tree from inorder and preorder traversals. I first started out by creating my ADT for binary trees and working with that to create a new tree. The way I worked it was that …  |
| | I have a function that needs to read a file line by line. It will check that line for a number(a process ID for my process scheduling function). The line is delimited by |. So I read the line in, get the first ID number, and then I want to …  |
| | Hey Everyone! So I'm a super beginner trying to teach myself the ins and outs of stacks (ever so slowly). Specifically, I'm trying to work out a programming challenge in which the objective is to write a function to tell if a string in the format of word1$word2 satisfies the … |
 | hello.. What do we mean by binary search and how we can do it using C++ thanks.. |
| | I am working on creating windows.h to creat tow threads, each thread takes tow files as input, the function that each thread excute is tested and work 100%,the problem is that one thread could work at atime ? I mean one function is excuted this is the threading code i … |
| | I'm trying to read some input from a file and print it. I have three files: Main.cpp Sudoku.cpp Sudoku.h. For some reason the program will not print anything unless it's in the main function. If I print anything in one of the functions of Sudoku.cpp file and the use that … |
 | First off, this is homework and I do my classes online and the teacher doesn't respond to my e-mails in the fastest fashion. I've been getting linker errors all day and I'd like at least an explanation of why they happen. here is my problem. Main.obj : error LNK2019: unresolved … |
| | hello.. can u tell me how i can determine if a certain number is a perfect number or not?! please help me.. thanks. |
 | How can I define an operatpr [] for this class ? [code] #include <iostream> using namespace std; class Vec4 { float f1,f2,f3,f4; public: Vec4(float ff1, float ff2, float ff3, float ff4): f1(ff1), f2(ff2), f3(ff3), f4(ff4) {} float operator [] (int index) { } Vec4 operator + (const Vec4& v) { … |
| | Hey all, I've been using Visual Studio for a long time. Lately though, after I build an executable successfully, it won't let me build it again for a solid 60 seconds or so, claiming that, for example, test.exe is still in use (when it's clearly not, because if I go … |
| | Hello Everyone. Could anyone please help me quickly find duplicates in a vector of over 60000 records. It takes a loooootttttt of time ;'(. Here's the code. [code] #include <string> #include <vector> #include <iostream> #include <algorithm> #include <sstream> struct MyPred { std::string x; std::string y; // add default values MyPred(const … |
 | I am new to programming so our assignment was to create a number guessing game, where the user picks a number from 1 to 100. The initial guess in 50 and then the program asks the user if it is higher or lower than my guess. Once the answer is … |
| | Hi guys!! I made a simple RPG where the player can move along the x and y coordinates, choose a class and meet opponents. I accept any suggestions on how to improve game. [ATTACH]17738[/ATTACH] |
| | hello guys...how can i use iostream.h in VS2008?? im using following code but it is no t working... [CODE] #include <windows.h> #include <iostream.h> HANDLE hEvent; DWORD WINAPI SampleThread(LPVOID iValue) { int iFinish = 120; for(int i=100;i<=iFinish;i++) cout<<i<<endl; SetEvent(hEvent); return 0; } void main() { HANDLE hThread; DWORD dwGenericThread; hThread = … |
| | I'm fairly new to Boost. I would like to use the Regex library. I wanted to follow this guide but it seems that it supports other versions of VC++. [url]http://www.boost.org/doc/libs/1_44_0/libs/regex/doc/html/boost_regex/install.html[/url] EDIT: I tried finding a link to VC++ 6.0 and I can't find it >_<, apparently Microsoft is no longer … |
| | Hi, I need some help figuring out what's wrong with my code. I'm getting quite a few of syntax errors for missing ';' which I have and missing type identifier. This errors are happening on my intarray.h file for string declaration (line 34). I get more errors that still need … |
| | I have been reading up on this forum looking for answers to my own questions but i find myself stumpped. I basically have to read from a file the last ten lines of input. Yes this is for a homework assignment and i have spent hours on it reading my … |
| | [CODE]//This a partially completed prototype of project 2 //currently use file FlatData1.dat as its initial roster #include <iostream> #include <fstream> #include <vector> #include <string> #include <stdlib.h> #include <cstring> #include <algorithm> using namespace std; typedef enum { thisWeek, nextWeek } WEEK; typedef enum { clean, wash, shop } DUTY_TYPE; typedef enum …  |
| | So, Daniweb. My teacher has been teaching us some old C++ (a problem I've been trying with little avail to rectify). I need y'all wonderful people to look over a section of code that I'm having trouble with. It has to do with recognizing a letter in an if statement. … |
| | I wanted the program to display each piece with its assigned color preceding it (eg a white rook would be 'WR'). [CODE]#include <iostream> using namespace std; struct attrib{ char x; int y; char cont[5]; char clr; }; attrib brd[8][8]; void prntbrd(void) { for ( int y =0; y<8; y++) //accesses … |
| | I have a list of names and I want to write them to file called (newfile) and then push them in vector and then i want to add a name to a list so i will push it in the same vector and then iam trying to write again the … |
| | Good Day, I will be starting a course in C++ soon and i was just looking over the internet for some examples and practise questions. I found this question very interested as these topics are on the course outline. Is it possible for you to assisst me in doing this … |
| | This is my code which determines it a lottery number is a winner or a loser. I have specific numbers that it needs to go by. My code compiles and it congratulates the user if when I type any of the numbers, however, if I type in 12345 or several … |
| | Hi everybody, I am not new to c++ but am far from a intermediate. I would appreciate any help or suggestions. However, my problem is I need to store dynamic data into different variables. For example time. I am trying to write an if statement that would take time store … |
| | I simplified an issue I'm having in another program with the small program here. The program is supposed to open the file with function openFile(). Then I want to initialize char a to the first character in the file via function accessFile() and output that character. My problem seems to … |
| | The book asks me to do the following: Note that the function from the previous exercise and the functions from §6.2.2/113 and §6.2.3/115 do the same task. Merge these three analysis functions into a single function. the three functions are: [CODE]double average_analysis(const vector<Student_info>& students) { vector<double> grades; transform(students.begin(), students.end(), back_inserter(grades), … |
| | how can I hook the LoadLibraryA API? I am googling a lot but I can't find any piece of code that helps me doing what I want to. I just want to intercept it and display in a message box what is the name of the DLL that the program … |
 | Hi, Thank you for helping. My source: [CODE] #include <iostream> #include <cstdlib> #include <exception> using namespace std; void MyQuit(); void mamama() throw(char *); set_terminate(MyQuit); int main() { mamama(); return 0; } void MyQuit() { cout<<"Uncaugh specification!\n"; } void mamama()throw(char *) { throw "this is end!\n"; exit(5); } [/CODE] And I … |
 | Hello everyone.I just have a curiosity which i think i won't be able to satisify by myself. Say we have this function : [code] extern "C" __declspec (dllexport) void whatever () { printf ("%s","whatever"); } [/code] if you try to call it from a process like this [code] typedef void … |
| | I've got this "simple" Fast Fourier transform code here, but being a beginner I'm not sure how to use it! I just want to know what the required input is, how do I input it, and what is the output? Can someone give me a hand at interpreting this please? … |
| | Hello Everyone. Could anyone please help me solve this problem. I am actually new to using STL. I have been given a task of searching a file of over 60000 records. The data extracted from the file is stored in struct and that struct is in turn stored in vectors … |
 | Hi guys, quick question. Does the structure [CODE] try { } catch { exit(0); } [/CODE] require the preprocessor directive [CODE]#include<cstdlib>[/CODE] to be declared at the beginning of the program? The thing is if I don't declare it the visual c++ compiler works fine but if I try in Unix … |
| | hi, i hav borland 5.02 compiler running on my win7 64-bit compiler,it is not supporting <graphics.h>header file,can some1 tell me plz hw to fix this problem?......... thanx in advance |
| | im doing a project oon e quiz management using c#.I urgently need code for selecting the answer of a question with multiple choice.and also I need code for incrementing the score when each question is selected.Please help me out.I have project submission day after tomorrow. |
| | I am just starting a programming class in C++ and my teacher hasn't taught anything about writing pseduocode and programs, yet expects us to be able to do so. I need help!!!! 1. Write out a complete algorithm in pseudocode for the following: User enters two uppercase letters or two … |
| | Hi guys I'm struggling to write a code for traversing a directed graph. It contains City as nodes. I'm trying to put City(s) to a LinkedList and then work with them to find the path. However, as you will notice I'm still newbie in C++. I have a *nextcities as … |
| | Hello All, Back again...Working on a program which requires that the user should be able to interact with the program. The objective of the program is this: A class called unique-bag which will store integers using dynamic array. This class stores only one copy of any given integer (no duplicate … |
| | Hey y'all, I have been working on a tensor library (Nth-order multi-dimensional arrays) and I've been having trouble coming up with a good scheme for a multi-dimensional iterator template. Basically, I have a class template "tensor_container" which stores all the values of the N-order array (as a std::vector of one … |
| | Hi all! This is from my code: [CODE]struct R3 { float x; float y; float z; R3(float, float, float); R3(); }; R3::R3(float a, float b, float c) { x = a; y = b; z = c; } R3::R3() { x = 0; y = 0; z = 0; } … |
| | Hi there, Could some1 tell me whats wrong with this code...I know i shudnt b using an int variable but whats the right one for a string... [CODE] #include <iostream.h> void main() { int a,b; cout <<"Enter the first name"; cin >>a; cout <<"Enter the 2nd no"; cin >>b; ((a=="Tom") … |
| | I've read the documentation [URL="http://msdn.microsoft.com/en-us/library/ms644906(VS.85).aspx"]link[/URL] and several threads explaining how to make a timer. Now after hours I still can't get my test to work. In the testDlg.h header I declare: [code] UINT_PTR m_uTimerId; CString textControl1; // Controls an Edit Control afx_msg void OnBnClickedButton1(); afx_msg void OnTimer(UINT_PTR nIDEvent); int myX;[/code] … |
 | So I'm trying to write this time keeping code for a project of mine. Basically, I'm adding 0.01 to a variable over and over again. While (A < B) { X = X + 0.01 A = A + 1 } I have written down the basic idea. The problem … |
| | I want to make a program which will send POST request to a web server. And also able to send required cookie(provided by me). Example. [url]http://www.somesite.com/requesthandler.asp[/url] POST DATA::::::::name=some_name&age=19 //i will provide the post data Cookie to be sent::::JHFFHJBSVB848X489CNU98C4Y //I'll Provide this cookie My desired application should POST the "POST DATA" … |
| | Hi guys, I know what is meant by vector <string> myvector as it will just take every inputs as string when we are trying to store the inputs in myvector. e.g. myvector.push_back(nick) but what about if we declare the type of vector become like vector <FLATMATE> myvector? Why it won't … |
| | What is a differrent between sorted and unsorted lists? The important points... |
| | [CODE]i have problem in running c++ program.iam getting more errors .can u help me to run it.[/CODE] |
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