[ifstream] Forum Topics

I wonder why this program does not do any changes to the text file that I am trying to modify. Scenario: My program uses the Fstream header file, I declared infile as IFSTREAM and outfile as OFSTREAM. I simply want to transfer data from infile to outfile. The data is …

Hello everybody! I'm trying to count the number of occurrences of each word in a text file. Problem situation requires to realize menu using "switch" statement (If file exist or not). There are following errors in my program ("case b" and "default" is not working): **[C++ Error] 03_int.cpp(61): E2126 Case …

Dear Kind DaniWebbers, I am trying to overload the fstream operators (ofstream/ifstream), so that I can save a class to a 'Binary' file and also display it with cout. But the ways in which each need to be implemented is different. Please can you show me how to define different …

I'm having a simple i/o with file problem. I have the name coming from a string but it just wont open at all. Incoming code: string notename[] = {"NULL","empty"}; ifstream readnote; readnote.open(notename[x].c_str(),ios::in|ios::out); if(!readnote) { cout << "Read Error"; } its prolly something small but i keep getting the error, can …

Please, I know this is a simple question. I'm copying this code out of my text book, almost ver-mother#&$(ing-batm And it mother#&$(ing refueses, REFUSES to open the mother#&$(ing file and write to the mother#&$(ing array. WTF - Sorry for the language, but this is so stupid and silly and I …

So i just started my project on a cpu sim , but right of the bat i ran into a problem #include <cstdlib> #include <fstream> #include <iostream> using namespace std; /* * */ int main(int argc, char** argv) { return 0; } void cpu() { } void memory() { int …

It seems I don't understand completely reading from and into files, line by line. Here is my code that is supposed to read lines of two file, into string variables, I assume, and then write them into third file: *line of first file line of second file .... so on …

a friend asked me to help him with his lab. the lab involves opening a file and adding the numbers in the file together displaying how many even and how many odd numbers there are. I have the file "textinput.txt" in the directory with the .cpp file but when i …

//////////////////////////////////////////////////////////////////////////////////////// // In this little project I am trying to learn to get and manipulate data from // a file input using fstream strings I also wanted to use the formating available // with the printf and related string handling methods. I have a question in regards // to the …

Guys, I've been stuck on this for a while now. This is actually one of my assignments, and I'm really lost. This is the assignment: ------------------------------------------------------------------------------------------- You manage a .txt file containing the customer ID number and account balance of the members of a bank. Last week, a computing error …

Ok so I want to have the user imput a name of a file to decode it. How would I do that? EX: cin>>fill ifstream in (fill)

In writing a logfile program, I need a function to output the log entries between two dates. I use [ICODE]seekg()[/ICODE] and [ICODE]tellg()[/ICODE] to save the position of the first entry to output and last entry and then go back later to output the data in between. However, [ICODE]seekg()[/ICODE] when told …

Hi all, I'm sure it's an error by me, but I'm having a problem with ifstream inside a loop. The reason for the loop is read in a piece of text from multiple files, and cases within the switch statement change the filename, path is previously declared. The first iteration …

I'm having trouble figuring out how to use exceptions to check if a file stream was created successfully. I know I can use if statements, but how do I do this using try/catch statements? It compiles successfully but it gives me an error when I supply a non-existent filename as …

Hi, I'm having trouble displaying the numbers in the file on the screen. The numbers are in the .data files but i cant get them to display. [CODE]//****************************************************************************** // Exercise: Homework 07 Arrays and pointers // This program reads two sets of integers from the text files A.data and B.data. …

Hi there, ok, im fairly new to c++ and have been trying to figure this out for ages: I have a text file i want to read in that contains lines and lines of lat long points; N50 42.22 W002 55.33 N50 42.22 W002 55.33 N50 42.22 W002 55.33 i …

Hi there, im new to the site and am hoping someone out there can help me with my question, im pretty newbie in the world of c++ and programming in general. Im making a program with a menu, you can choose between entering a number yourself to be tested as …

Hello all, I have a text file called: concentrations.dat The file contains a lot of different data. Here's the data that I'm interested in: # ET: list of elements <ET> 'Cu' 'C' 'Sr' 'He' 'Mg' 'O' 'Cr' What I want to do is read the elements into a vector called …

Hi, I'm a newbie to C++ so please be patient. I have to create program that outputs a simple moire pattern or a graph of y-values from a .csv file depending on which one is called. The code below is what I have before main and is where I am …

Hi All, I'm a relative newbie having trouble completing a program that is required to read the text character by character from a .txt file and to then encode certain characters to something thing else. It is then supposed to be output to a separate .txt What seems to happen …

Hello. I have some problems. 1.With for cycle. This is my code: [CODE]#include <iostream> #include <fstream> int main () { int i; int i2; char sentence [200]; char repeat; ofstream file ("file.txt", ios::app); for (i=0; i<1;) { cout << "Enter sentence (max. 200 symbols)\n"; cin >> sentence; if (!file) { …

I've searched the C++ forums and cannot find anything that relates to my question. I am writing a program (for class) that opens a txt file and reads doubles from the file, then computes the standard deviation of the numbers in the file. In order to do this, I am …

Hi guys, I'm trying to make a function that allows the user to enter in a file name and access that file; if the file name is wrong or the file is not there, I want to allow the user to enter in another file name. For some reason the …