2,025 Topics
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| | Hi everyone, I am doing a C++ project for school in the UNIX lab that requires inheritance. My main program is calculating linear regression for some plotted points and I'm inheriting a linear system solver from another program. The linear system solver is suppose to print the solved values to … |
| | I am having a difficult time with a BitStream class. I need to overload the extraction and insertion operator for the classes, but I am at a loss. Here is what I have so far. Any guidance is appreciated. [CODE] #ifndef BITSTREAM_H_ #define BITSTREAM_H_ #include <iostream> #include <fstream> #include <vector> … |
| | Hi, this is my first time posting here so I'm sorry if I post something wrong. I have an assignment for my class and I think I have done everything right, well except for this one error that's been killing me. I get this error for each function call when … |
| | Hey guys I could really use some help here. In my program I need to ask the user for two 4 bit binary numbers . Then if they select add then add or if multiply then multiply. my problem is that I got the addition to work but the multiply … |
| | I am working on a Dictionary project based on AVL tree. The Dictionary can add words from the input.txt. Here is the input example: 0 3 sheep,con cuu mother, me water, nuoc 0 : the code to show that you are about to add words to the Dictionary 3 : … |
| | Hi guys i spend 3 weeks doing this project , but i don't know how to start implement the Delete and update , can u please help me guys .? here is my attachment and my code [CODE] #include <iostream> #include <fstream> #include <cstring> #include <cstdio> using namespace std; class …  |
 | Hi.. I want to compress a text file which is like this:(input.txt) [CODE] ffa11 ffb13 ffd2 e c e r [/CODE] and save the result in (output.txt) [CODE] #include<fstream> #include<iostream> using namespace std; int main() { char ch; int counter=0; fstream infile; fstream outfile; infile.open( "input.txt",ios::in ); outfile.open( "output.txt",ios::app ); … |
| | I am working on an Encryption/Decryption program for class and have run into a problem. I seem to have gotten the encryption correct, but I am unable to decrypt what was encrypted in order to get an output equal to what originally went in. Here is the code I have … |
| | So, when I run the program and try to list all the information I get an interesting error message that pops up: ----- Debug Assertion Failed! Program: ...ocuments\Programs\C + + Programs\Checkbook\Debug\Checkbook.exe File: f:\dd\vctools\crt_bld\self_x86\crt\src\tccpy_s.inl Line: 19 Expression: (((_Src))) != NULL ----- Though I have an idea that it probably has something … |
| | Im an IT student(just started) we had this basic assignment: Antivirus Suppose you are going to create an antivirus program. You will need to search a file for any trace of a virus and if found it should be removed. However, a backup of the original(“infected file”) file should be …  |
| | Im supposed to sort a file in decending order using bubble sort into an array. My code does all of that but it repeats the sorted array 50 times instead of just listing it once. This is a C ++ file on Dev. Thanks for your help, it's due midnight … |
| | Sorry but I'm having a problem whit this function that is meant to let me edit records in a binary file. After I enter what I want to change an attribute to the file remains unchanged. [CODE]void updateStudent(fstream & file) { S students; long lenth; char snum[10]; char editChoice = … |
| | Guys, I really really need a hand on this simple problem that I think, for me, is a really really big problem. I'm using the compiler turbo C. I have all the codes working except that it does not go back to the main menu. Can you please check my …  |
| | i have the following code...according to my book both the files should open...but it opens both the files...writes into them....but when i open them for reading....only one opens up....pls see where i am wrong....[CODE] #include<iostream> #include<fstream> using namespace std; int main() { ofstream fout; fout.open("country.txt"); fout<<"United States of America\n"; fout<<"United … |
| | [code] #include <stdio.h> #include <conio.h> #include <iomanip.h> #include <ctype.h> #include <string.h> #include <iostream.h> #define input "d:\\tcpp\\bin\\files\\input.txt" #define tempo "d:\\tcpp\\bin\\files\\tempo.txt" void menu(void) { cout << "Menu\n\n"; cout << "A - Add\n"; cout << "D - Delete\n"; cout << "I - Display\n"; cout << "E - Edit\n"; cout << "S - Search\n"; …  |
 | Hi, been programming all day long, and tryed to compile my program, everything is fine, except some kind of nonsense with ofstream.. These are the problems, and i don't know why ofstream says such things, because in my other programs everything is fine with seekg, or tellg, and everything else … |
| | hi.. i write this statement there is no errors but it not showing me the out put this is the my code: [CODE] #include<fstream> #include<iostream> using namespace std; int main() { fstream infile; fstream outfile; infile.open( "classnames.txt",ios::in ); outfile.open( "bufferednames.txt",ios::out ); infile.unsetf( ios::skipws ); int ch; for( int i=0; i<4; … |
| | This is driving me mad. This program reads 8 records from an iseries data queue and then I get the segmentation fault. I can't work out why. Does anyone have any ideas? Please!! [CODE] #define WIN32_LEAN_AND_MEAN // Include the necessary DQ Classes #include <iostream> #include <fstream> #include <windows.h> #include <cwbdq.h> … |
| | I'm trying to implement a maze program by using nodes that reads in a file and the user is able to enter a direction and solve the maze. My class will not output correctly and I've been working on it for a LONG time. Any help is appreciated! I also … |
| | This is a program my instructor wrote and I have to create a program that similar in format. My issue is I don't quite understand what main is doing or how it works, was hoping someone could explain it to me in detail. Rolodex.h [CODE] #ifndef _ROLODEX_H_ #define _ROLODEX_H_ #include … |
| | I am in need of an explanation on how to pass information from my input file to my program. This is what I'm trying: [CODE]#include <cstdlib> #include <iostream> #include <fstream> #include <string> using namespace std; struct BevInfo { char bevName[11]; float bevPrice; int bevLeft; }; int main(int argc, char *argv[]) … |
| | can anybody tell what's wrong with this code! //=========================================================================== // hybrid.cpp --this file implement the hybridlist class // Time-stamp: <2010-10-29 18:52:46 Dnambembe> // To compile: // g++ hybrid.cpp // Copyright (c) 2010 by Domingos Nambembe. All rights reserved. //=========================================================================== #include<iostream> #include<cstddef> //need NULL #include"hybrid.h" using namespace std; typedef NodeType* NodePtr; … |
| | [code] #include<iostream.h> #include<conio.h> #include<iomanip.h> #include<stdio.h> #include<stdlib.h> #include<fstream.h> #include<string.h> int n=0; // current no. of players ( to add to next one) int num=0; // total number of players class date { public: int dd; int mm; int yy; }; class players { public: char name[30]; date dob; char userid[30]; char …  |
| | The C++ I/O system supplies an interface to the programmer that is independent of the actual device being accessed. This interface is known as stream. The I/O system contains a hierarchy of the stream classes used to define various streams to deal with the console and disk files. These classes … |
 | Hi I am creating an program for my degree, it’s a program that logs call times, days, gives total cost and discounts depending on days of the week, at the end of the program it out puts all results then give an option to start over again or exit. So … |
| | [CODE] void RB_number() { int roomnumber; string category; string type; string status; float rate; int roomid; //Try,catch and throw statement for exception handling to catch errors that are inputed from the user try { cout<<"\n\n\t\t\tEnter the Room ID you wish to view:"; cin>>roomid; if(roomid < 0) throw "Error"; } catch(string) … |
| | Hi i am a total beginner and studying for a FD degree in C++. My assignment states Assignment Details a telephone company requires a program to calculate call charges for their customers. The regular charge rate for long distance phone calls is £1.50 for the first 3 minutes (or part … |
| | ok guys need some help, I'm sure the answer is simple but i'm making a program for an assignement that models points in a cartesian plane and prints them out this is what i have so far in main [CODE]#include "point.h" #include <iostream> #include <string> #include <fstream> //for ifstream,ofstream #include … |
| | hey guys...!! i really want ur help in this program..!! its a Hospital management system program..!! it take input from the use..it can save input in a file..display all input on to screen, but i cant find a way to delete a record/patient details from the file PLZ help me..!! … |
| | Hi, this is my first time posting and I would like thank everyone in advance. I'm doing a homework assignment that requires me to design a teller application which simulates a bank. I'm currently getting a segment fault, after I call one of my getBranch(). I've tried to do this … |
| | I am working on a program that reads students name and test score from a file. The program should assign the appropriate letter grade, then output the name score, and grade. It should also determine the highest test score. I do not see where my errors are. Please help! [CODE]// … |
| | Hello, I've got a simple program where i'm trying to a Char array with a string, but even though the program in debug mode shows that the string Phone = Phone, it is not adding a new line when the string starts with Phone. Can anyone tell me why the … |
| | Hi everyone! I am a class XII student. I have been asked to make a project using c++. I have decided to make a word game. The game's objective is: * show a random jumbled word stored in a file * ask the user to enter any valid words that … |
| | hi!! i,ve written d program on airline reservation .... but i m facing problems regarding the value of seats ... that is how do i sore different values of seats available in diff flights [code] class air { protected: int z; char clas[10]; char source[5][10]; char dest[5][10]; int seats; int … |
| | I was wondering. Is there a way to write something from one method in to a result file instead of outputting to screen? To describe a little better, in pseudocode: [CODE] #include <iostream> #include <fstream> using namespace std; class Inputoutput { private: ifstream fileOne; ofstream fileTwo; int i; //More variables …  |
| | in the program i am creating a file with specific path.. file name is to be entered by user and then we have to create a file but the code is giving the error written after the code. void f_Createfile() { string dirpath; // stores final name for file with … |
| | Hi, I am writing a code that reads input from user to create a linked list database at the same, time it write the data received in to binary file. when I run the program is supposed to prompt the user to enter the data for ten time, however the … |
| | Whats wrong with this code. I can create the DAT file.Name and Grade is writing to the file perfectly. but the file contains ASCII values for RollNO and after Grade. [B]Output file:[/B] Name A ÈB [B]Program[/B]: #include<iostream.h> #include<conio.h> #include<fstream.h> #include<string.h> class stu { int rollno; char name[20]; char grade; float … |
| | Hi I'm doing an assignment on Rational Number calculations. I'm getting some compiling errors which I don't know how to fix. Here is the error message and the code is beneath the error message. I would really appreciate if someone could read over this and see if you know whats … |
| | I need to write a program that generates a magic square of an odd number between 3 and 15. I have written out this much code, and when i type in 3 for the number it gives me the correct square. but any other odd number it gives me an … |
| | I am finally learning about fstream but Im stomped with this problem that I have. I have a current file that I am opening. Each line of said file looks like this: D40001~10997~811~DANIWEB~555-555-5555~7.70~I~2111 There are around 5000 lines with different DXXXXX numbers. I want the user to input a dnumber … |
 | ifstream mystream(file_name); ofstream outputstream(filename, ios::out); do { mystream.getline(line, 100); mystream >> country_name >> happiness_value; total_happiness = total_happiness + happiness_value; count++; outputstream << country_name << " \t \t " << happiness_value << endl; } while (!mystream.eof()); the file ifstream is reading from is a .dat file, in this format: first 1 … |
| | [CODE]vector<string> file_pass; if(count == m2+1) { p2_pass = onfile.tellg(); shift = p2_pass-p1_pass; onfile.seekg(-shift,ios::cur); for(j=0;j<shift-1;j++) { onfile.get(ch); temp_pass[j] = ch; } user_pass.assign(temp_pass,temp_pass+shift-1); file_pass.push_back(temp_pass); }[/CODE] for first input asthana it is giving asthana but after push back for second input saxena it is giving saxenaa i know last a is from first … |
| | I jailbroke my iPhone with iOS 4 a program called 'limerain'. With it, I installed Cydia, and a few other applications that Cydia allows. A few days after I jailbroke the iPhone, it stopped getting service, which is really weird, because it's not like it was right after... I still …  |
| | I guys, i have a problem with binary files A file is opened in the beginning of the main then a case to give the user a choice: 1.- Show the content of the file 2.- Search for a name 3.- Search for a type of crime 4.- Search for … |
| | Hello there!!! I wanted to announce here that the new iOS 4.1 version that apple released some weeks ago, cause to very many WiFi problems. users report [URL="http://discussions.apple.com/forum.jspa?forumID=1390"]at this forum[/URL] that indeed the iPod indicate that it is connected to the internet but when the user try to access the … |
| | Hello members of Daniweb :) I am a frosh IT student and I need little help with this :) ok so the program is basically a simple cashier program. you enter a code for an item. you buy it compute for the change etc. etc. now my problem is with … |
| | Having problems with executing jobs using fork. The code is supposed to create one job and execute one job and repeat this multiple times. We are only supposed to use usleep in the jobgeneration() function. We are having trouble sleeping and executing ctrl-c in the execute job function. [CODE] #include … |
| | hi everyone = ) i wrote program using C++ it's for type a small letter then it will print it back in a capital letter using file processing i wrote the letters in txt file in the same c++ folder like this way a A b B c B and … |
| | I am trying to create a program to log the medal tally of the cwg. However,I'm still getting wind of using binary files. It seems as if nothing is being read from or written into them. Below is my entire code. It would be of help if somone could direct …  |
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