When I write a code in c++ includes thread library it says "thread:no such file or directory". How can ı use thread library .
I think I should download boost or c++11 but I couldn't do it .
I'm trying to write a program that opens a directory and for each file in directory,it creates a thread. Inside of the thread,it reads the numbers in file.(one number in one line)And then calculates the average of these numbers. I write something like this;
void *calculate(FILE *piece){
int a,k=0,s=0,ort;
while(!feof(ayri)) {
a=fgetc(ayri);
s=s+a;
[Code] ....
When I run the programme,i get lots of errors like 'segmentation error' and some stuff about pthread_create. And I don't think the 'calculate' function is right.I don't know the right way to read numbers line by line.
I have a class which I wrote and one of its object is "SerialPort" .NET class. In my MainWindow I created instance of my class called "SerialPortComm", then I send through some functions of mine, commands to the Serial Port, and I receive answers through "DataReceived" event.
But when I trying to use Dispatcher.BeginInvoke to write my data I have received (successfully), nothing shows on the RichTextBox which I'm trying to write to.
What can caused that, and How I can make it works?
SerialPortComm.cs
public partial class SerialPortComm : UserControl {
public SerialPort mySerialPort = new SerialPort();
public void Open_Port(string comNumber, int baudRate) {
mySerialPort.PortName = comNumber;
mySerialPort.BaudRate = baudRate;
[Code] ....
I'm having a little problem with std:fstream - in my program, the user selects the location of a file which I want to remember. So, I have something like this:
Code: std::string fileLocation;
//Code here creates an 'open file' dialog box which lets the user choose which file to open.
//The string 'fileLocation' now contains the path to the chosen file.
std::ofstream prefs("prefs.txt");
if (prefs.is_open())
{
prefs << fileLocation;
prefs.close();
}
This works fine if the file chosen is in the same directory as the program, however, if they try to choose a directory outside of where the program is kept, it saves the text file into that directory instead of the same one as the program. So, it looks like outputting a directory into an ofstream actually changes the location to which the file is saved.
Is there a way to save the file directory to a text file using ofstream and still have the text file save in the same directory as the program?
// mergefile2norecreation.cpp : definisce il punto di ingresso dell'applicazione console.
//
// Filemerge.cpp : definisce il punto di ingresso dell'applicazione console.
//
#include "stdafx.h"
int _tmain(int argc, _TCHAR* argv[]) {
TCHAR inputfile1[MAX_PATH];
TCHAR inputfile2[MAX_PATH];
TCHAR outputfile[MAX_PATH];
[Code] .....
There is a smart way to make a merge sort between 2 file already ordered? I had try it ,and above there is my result,it works but i think that it's possible to do it in a smart way...
I need my Unix program to generate a directory with a format like this: "hinesro.<pid>". I have some code that mostly works, except for the directory ends up with a question mark on the end, like this: "hinesro.12345?". I need it to just display the directory without this question mark. Here is my code:
Code:
// Using headers sys/types.h, sys/stat.h, unistd.h, and stdio.h
int pid = getpid();
char prefix[] = "hinesro.";
char fileName[0];
sprintf(fileName, "%s%d
", prefix, pid);
[Code]...
I have problems opening a file within a directory.
#include <dirent.h>
#include <string>
#include <vector>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
[Code] .....
Error Message:
$ ./dirsearch ~/Documents/College/textfiles/
[..]
[yomama.txt]
Error : Failed to open entry file - No such file or directory
Here are my current file permissions:
textfiles$ ls -l
total 8
-rw-rw-rw- 1 jav jav 7 Apr 26 13:14 moretext.txt
-rw-rw-rw- 1 jav jav 10 Apr 26 12:38 yomama.txt
I try to get file names listed by date or name in c. How can i do this.
There is a code: But this gives randomly file names.
DIR *dir;
struct dirent *ent;
dir = opendir ("c:src");
if (dir != NULL) {
/* print all the files and directories within directory */
[Code] ....
I have a header file with a bunch of functions. I want to create a thread using the <threads> package and am using
void myclass::functionX() {
}
void myclass::function() {
std::thread tr(myclass::functionX);
}
I am getting the error "no instance of std::thread::thread matches the argument list argument types are (void());
I have my libraries in ../../lib location
and when i try to compile :
gcc -O9 -I ../../include/ -L ../../lib/ -o test test.c thr.o -lm -lthread
I get :
gcc: error: thr.o: No such file or directory
obviously the problem is the library path location but my obj is there
ls -al ../../lib/ | grep thr.o
-rw-rw-r-- 1 xxxxxx xxxxxx 23544 Aug 12 23:03 thr.o
????
I am trying to substitute a variable for the file directory. Here is the error: error: no matching function for call to 'std::basic_ ofstream <char>:: basic_ ofstream(std::string&)'
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <stdio.h>
#include <windows.h>
using namespace std;
[code]....
I'm quite new to C++ and got a problem of reading some files from a directory. All files is pure text, and I have no problem in reading these.
My problem is that I always have to read the oldest file without knowing the filename, and then move it to another directory and so on. Is it possible to use the timestamp instead of the filename to access the right file - read it and then move it to another directory?
Convert this code into one where you can input the file directory from the console?
#define WIN32_LEAN_AND_MEAN // prevent windows.h from including "kitchen sink"
#include <windows.h>
#include <iostream>
#include <string>
using namespace std;
int main()
{LPCSTR Application = "C:Program FilesWindows Media Playerwmplayer.exe";
// Media file extension must be provided
// Paths are quoted
[Code] ....
This code works but the directory can only be changed from the code not the console.
I'm trying to compile this code which is a header file.
#ifndef CUBEMAP_H_INCLUDED
#define CUBEMAP_H_INCLUDED
#include "Texture.h"
#include <string>
class CubeMap : Texture {
[Code] ....
But I get the following error:
|9|error: expected ')' before 'Directory'|
How can i resolve this?
I keep running into this error, even though the first few times i built and ran something it worked perfectly, and since I'm new to CodeBlocks (or any IDE/Compiler for that matter) what to do.Any code i put in, it'll give me this error....
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View 5 Replies View RelatedI'm reading from stdin a line. With that line, I should open a new textfile with the first letter of that line on a certain directory. My code is the following :
Code:
int main() {
char line[BUFSIZ];
FILE *ptr_file;
int x;
while(fgets(line,BUFSIZ,stdin) != NULL){
[Code] ....
char caminho[] is the directory in which I want to create the text file and chave will be the first letter of the line in stdin.
How am I supposed to use strcat to get these two together in a string to then use ptr_file =fopen(caminho, "w");
I have two questions about C programming here :
1. I want to make a file in the program directory that can't be deleted by user out of the program make that file.for example if I make a file named "123.xyz" by the program named "text.exe" and then exit test.exe ,if I tried to delete the file 123.xyz I faced the error and I could not do it but by the test.exe program that make that file.
2. I heard about a function called "Parbegin()".any way i want to know is there any possible way to run two or more functions of a file.c together,like the parbegin function did an do in OS?
I know how to open a specific files by using
ifstream infile("something.txt");
but how do you let the user select an arbitrary file from the working directory?
I want to write a single line to a file and upload it as a .txt file to a server directory . I know the traditional way to upload a local file to a server
public bool ftpTransfer(string fileName){
try {
string ftpAddress = "test.com";
string username = "test";
string password = "test";
[Code] ....
is there anyway to change this so that I can write the contents of the file through the program and upload it directly without having a local file?
regex pattern that takes only directory without file name
private void txtDownloadRoot_Validating(object sender, CancelEventArgs e)
{
Regex driveCheck = new Regex(@"([a-zA-Z]:[^/:*;/:?<>|]+)|({2}[^/:*;/:?<>|]+)");
if (!driveCheck.IsMatch(txtDownloadRoot.Text))
[Code].....
I am using stat command to check the existence of a file in a directory.
The directory is having some 10K files. I feel the stat() call is expensive as i do not need the structure to be populated.
I want only the existence of the file.
Is there any other alternative faster way to do this in C.
I need to write a program that acts as a file manager for all the files and folders in the directory given as an argv parameter and all of its subdirectories. This means be able to move, rename, delete the files in the sub directories. Also I need to be able to store the structure of folders and files in a binary tree adt (I have one already). But I'm not sure what libraries to use with this and how do I open a directory is it like a file with fopen?
View 4 Replies View RelatedI have tried to use File.Copy and File.Move but non of them would work as I expected .....
View 1 Replies View RelatedI need to write a program that will read a .bmp image file of an 8 by 8 pixels resolution and write the data about every pixel in a text file. The problem is, that I can't find a library to use. I've tried using CImg but even the basic test examples fail with "undefined reference to setdibbitstodevice...." or something like that. I know CImg is a powerful library and it can even manipulate images, but I need something just to read it.
View 2 Replies View RelatedI have a libcx3d.a which contains my VrmlParser class and other classes which are used by VrmlParser. I have a main.cpp which does this :
VrmlParser vp = new VrmlParser();
double **VOB = vp.getVOB();
When I compile using g++ main.cpp -o main -L. -lcx3d, I get the following errors :
'VrmlParser' was not declared in this scope.
expected ';' before vp.
'vp' was not declared in this scope.
There is a header file called "VrmlParser.h" in the static library. Should I include this header file in main.cpp ? If so, will include "VrmlParser.h" work ? I have the .a and .cpp in the same directory. I can't find the header file for the static library.