[fstream] Forum Topics

I'm writing a code that will save the username of a user when a button (in this case button1) gets pressed. I save it to a file called info.txt, and i use fstream in order to save it. Currently I'm running into the issue that, while i can open up …

I am using fstream to open and close a file. The code works OK, except the the file does not close when I close it the first time. I need to invoke close twice. Any idea why? And, what this is saying about my code that I do not realize?? …

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 …

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 …

I'm not understanding why i'm able to read from the file but i can't write to it. The fstream is open in both modes. Once the program finishes i haven't changed the content of the file. Thank you in advance. #include <fstream> #include <string> #include <iostream> int main() { std::string …

Hello, I have a bug in my program somewhere and I cannot understand why. The program merely prints data from a binary file. Here is the code: #include <iostream> #include <fstream> #include <vector> #include <cstdint> using namespace std; int main(int argc, char *argv[]) { if (argc!=2) { cout<<"Invalid argument count, …

Hello, Looking at the standard streams provided by the stl libraries, it seems as though it is impossible to have 1 stream to use for both standard console IO and file/string IO. However, before I give up I would like to ask, is this possible: generic_stream stream; stream=cin; //now I …

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 reading data from a text file and then printing it. I am not sure what I am doing wrong but the program prints the last line that it reads twice. void bank_account::viewHistory() { ifstream in_file("bank_transaction_history.txt" , ios::in); if(!in_file) { cout<<"File error \n"; } cout<<"Event"<<setw(15)<<"Amount"<<setw(15)<<"Date"<<setw(20)<<"Current Balance"<<endl; string eve,dat; double …

Hi What is the difference between using the **fstream** library to read a file....and using something like a procedure below using the FILE* object? There seems to be two ways to read a file? Thanks /* FEOF example */ #include <stdio.h> int main() { FILE * pFile; char buffer [100]; …

I have been getting used to c++ as I have been trying various scenarious on programs and exand on them with new concepts. This is my first try at exporting data from command line to a text file and the program runs fine with all the calculations. The real issue …

Hi, could anybody please tell me what i am doing wrong in this program. The goal is to read the student name and grade from a text file and print it on the screen. This is what i have so far. by the way this is for a school project …

I am trying to add a comma to the end of each line ('\n') of a text file til the end of the file is reached. I am opening the file in append mode but am unsure as to how to go about identifying when the end of line is …

I'm writing a program that will keep track of every Anime/Manga I watch/read(I'm an avid fan). I'm trying to make a database in order to keep track of all of the titles of the Anime/Manga. My problem is that when i try to add a new title to the existing …

Hello! I'm new here, so correct me if this is the wrong location... but I'm trying to make a program for the Minecraft server I'm on, and it requires that if someone wants to make a map that is used on the server, that there's a .xml file that shows …

Here is the exercise: > fileWord > Write the definition of a function named fileWord that receives a string argument that is the name of a file containing words. > > The first time the function is called, it returns the first word of the file whose name it was …

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 …

First of all, just registered and this forum looks great! PROBLEM: My program which I wrote in Code::Blocks, has compiled fine and has worked fine, but when I run the outputted file called (BINDED.exe) it shows a very quick console window then closes, I think this is due to the …

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 …

I've found some similar posts on opening different files with the same file stream but they are difficult to understand. I'm trying to figure out for a larger project why I can't use the same file stream as in this example and what an alternative solution may be. And yes …

I had a problem with some program I wrote that edit specific values within a specific file. When I saved the values, using fstream's write() function, everything between these values became null. I've looked again in the I/O tutorial - [URL="http://www.cplusplus.com/doc/tutorial/files/"]http://www.cplusplus.com/doc/tutorial/files/[/URL] and saw that they use memory block at the …

Hi I have a problem with a code I made, some save editor for some game. The code suppose to write 2 bytes to a specific offset in some file. The file's short integers are saved as little endian. everything works fine, but when one of the integers equal 10, …

Alright - this is my conundrum. As a noob to C++ I am only in chapter 9 of my book, having just covered object oriented programs and the exciting world of vectors and arrays. I have an assignment that asks me to run a loop to get and calculate a …

ok so what does this do.. 1.) read the text file(most likely a c++ code in text form) line by line and display it line by line... 2.) (as the title says) check for syntax errors. ( only minor ones like missing ";" or a lack of closing braces) soooo..... …

I need a program that opens a sample program and counts the number of reserved words, operands and operators. Operands and operators are easy to distinguish. My problem is how do I determine the reserved words there? One solution I thought of is to create a separate text file that …

I already know how to use fstream. I know to save the value variables to a file, and I also know how to make the program display the information in the file, but my problem is that it saves the content of the variable, not the variable itself. Here's what …

Trying to write a simple program that will read data but keep stumbling upon the fact that I kinda can't limit the amount that is read. I have simple student.dat file which is filled ATM with nothing else but simple string "somethinginside", without quotes. When I do this on each …

I need your help... Again... How can i combine reading from file with [iCODE]std::getline(file, std::string);[/iCODE] and [iCODE]UpdateData(FALSE);[/iCODE] ? UpdateData() accepts only CString and getline only std::string, and then i try to use it like that: [CODE]std::string readbuff; int length; std::ifstream file("file.txt"); while(getline(file, str)) { length = str.length(); for(int i=0; i<length; …

Hi im writing a function in a program that lets the user delete a specific record in a file, the user is also able to recover this record. The easiest way i found is when the record is deleted, the record will be set to deleted using bool. Then in …