file-handling is an abstraction of common actions such as creating, opening, closing, reading, updating, writing, comparing and deleting files
Questions tagged [file-handling]
2915 questions
4
votes
2 answers
Cannot write the data in the file, no error in the program C++
I cannot write data on a file with these pointer variables in the class. there is no error in the program but no data is written on the file.
kindly someone tell me that where i am doing something wrong.
#include
#include…
Sireiz
- 383
- 3
- 10
4
votes
2 answers
reading big data in C++
Im using C++ to read large files with over 30000 lines and 3000 colums. (30000 x 3000) matrix. im using a 2d vector to push the read data. But i need to do this process a couple of times. Is there any way to optimize the reading process?
Abhishek Thakur
- 16,337
- 15
- 66
- 97
4
votes
4 answers
Java URLClassLoader not recognising a String
I've got a really strange problem.
I'm using a URLClassLoader to dynamically import files from a directory. The code works fine if I use a literal string, and works fine if I use a variable to a literal string, but this isn't what I need.
package…
Apache
- 619
- 6
- 22
4
votes
1 answer
Parsing a flat file in Java
I have a flat file in which data is stored in position based format For eg. from 1 to 5 - some x value is stored, from 6 to 13 - some y value is stored, from 14 to 18 - some z value is stored and so on..
I need to parse the file and get those values…
Anand
- 20,708
- 48
- 131
- 198
4
votes
2 answers
Handle ASCII in R
I have some files of Micro Data from a Populational Census stored as .txt and coded in ASCII.
When I open them in a text editor I get something like:
1100015110001500100100003624008705865085282310200600101011022022 14 444231 etc.
Since I have no…
Joschi
- 2,941
- 9
- 28
- 36
4
votes
3 answers
finding out the downloaded image file size in IOS
Hello I would like to run a thread and check the current downloaded size of a file.
This is what I use
UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL…
Sarp Kaya
- 3,686
- 21
- 64
- 103
4
votes
2 answers
Storing String on File in C
I created a small program to input some records to a file.
#include
int main(void)
{
FILE *fp;
//opening a file to write
fp = fopen("try.rec","w");
if(fp == NULL)
{
printf("\nSorry! Couldn't Create File");
…
cipher
- 2,414
- 4
- 30
- 54
4
votes
3 answers
How to delete root app/app/ files?
My phone is rooted. I'm trying to do a very simple program. The program should delete file from app/app folder. How can I do this? I'm newbie, so example code is valued.
eagerToLearn
- 41
- 1
- 3
4
votes
1 answer
Why does calling istream::tellg() affect the behavior of my program?
I am trying to convert a 24 bit bitmap image into grayscale.
#include
#include
#include
#include
using namespace std;
class pixel{
public:
unsigned char b;
…
Diptanshu
- 103
- 2
- 6
4
votes
3 answers
Simple Delete File Program in ANSI C for Windows
Looking for a simple program to a delete a file written in ANSI C.
Just as an example how would you delete a file at "C:\test.txt" with C?
BuddyJoe
- 69,735
- 114
- 291
- 466
3
votes
2 answers
File handling in JavaScript
Is it possible in javaScript to create an html file in same directory ? After some searching on google I landed upon using ActiveXObject like this :-
var fso = new ActiveXObject("Scripting.FileSystemObject");
varFileObject =…
Lina Clark
- 243
- 4
- 9
3
votes
1 answer
Sharing data between applications - share memory vs D-Bus vs File operation
Consider a scenario in which two applications have to share data among them. I can think of three ways-
Shared memory ( Boost I am allowed to use )
D-Bus ( glib / Qt implementation allowed )
File operations on a common file between the two…
Amit Tomar
- 4,800
- 6
- 50
- 83
3
votes
4 answers
how to read line by line in android?
i am using this code.
try{
// Open the file that is the first
// command line parameter
FileInputStream fstream = new FileInputStream("config.txt");
// Get the object of DataInputStream
…
rameezmeans
- 830
- 1
- 10
- 21
3
votes
1 answer
How to handle ofstream object in case of application crash
I've a singleton logger class which will be used to write data into a single file and I'm just wondering how to handle the ofstream object in case of application crash.
#ifndef LOG_ERROR_H_
#define LOG_ERROR_H_
#include
#include…
m_alpha
- 134
- 13
3
votes
1 answer
Why is StandardOpenOption.CREATE_NEW not creating a file to be read from in Java?
Here is my code:
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SeekableByteChannel;
import java.nio.file.Files;
import java.nio.file.InvalidPathException;
import java.nio.file.Path;
import…
Shri
- 109
- 9