C :: Open New Text File With First Letter Of Line On A Certain Directory
May 23, 2013
I'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");
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Dec 20, 2014
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.
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Jul 22, 2013
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?
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Jul 5, 2013
I have a text file (test.txt) with the following data:
01,05,25,20130728
01,06,25,20130728
01,07,25,20130728
01,08,25,20130728
01,05,25,20130728
01,05,25,20130728
01,05,45,20130728
01,05,65,20130728
01,05,85,20130728
01,05,35,20130728
01,05,25,20130728
01,05,35,20130728
I want to read this to one string called line. So far I have this code:
string line;
ifstream myfile ("/home/Test.txt");
if (myfile.is_open()) {
while (myfile.good()) {
getline (myfile, line);
for (int a = 0; a <= 335; a++) {
cout <<line.at(a);
} }
myfile.close();
}
so far its only printing the first line and then throwing an instance of 'std::out_of_range'
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Aug 24, 2013
I can able to get the last line ten chars but i cant get if the last line is null.
here is my code
#include <cstdlib>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
using namespace std;
int main(int argc, char *argv[]) {
[Code] ....
here with i have enclosed my file where i am pick my last ten chars ...
Attached Files : log.txt (4.8 KB)
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Dec 25, 2014
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?
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Apr 7, 2010
The objective: Open and read a CSV file one line at a time using SQL commands.
The problem: I am getting an error that I have a feeling may not point to the "real" problem.
Where I may have syntax or other errors in code.
stInputConn = "Provider=Microsoft.jet.OLEDB.4.0;Data Source=V:\IT\RE\Exports\;Extended Properties="text;HDR=YES;Format=Delimited(,)"";
OleDbConnection cn = new OleDbConnection(stInputConn);
stInputFileName = ConfigurationManager.AppSettings.Get("InputFile");
// the input file name is CSV_DataExport.CSV
[Code] .....
The last line (ExecuteReader) is where I get the OleDb Exception.
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Jan 12, 2015
Taking a OS course and my professor gave us files to reference in a directory located at ~agw/class/os/share/proj3. But when I typed this into the terminal I keep getting a permission denied error message.
[lastname@erdos ~]$ ls
dead.letter Desktop Documents Downloads Music Pictures private Public public_html Templates Videos
[lastname@erdos ~]$ ~agw/class/os/share/proj3
/u/sobolev/agw/class/os/share/proj3: Permission denied.
[lastname@erdos ~]$
I'm not sure what I am doing wrong. Ive opened shared directories for this class before and had no issues.
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Dec 9, 2013
Taking a OS course and my professor gave us files to reference in a directory located at ~agw/class/os/share/proj3. But when I typed this into the terminal I keep getting a permission denied error message.
[lastname@erdos ~]$ ls
dead.letter Desktop Documents Downloads Music Pictures private Public public_html Templates Videos
[lastname@erdos ~]$ ~agw/class/os/share/proj3
/u/sobolev/agw/class/os/share/proj3: Permission denied.
[lastname@erdos ~]$
I've opened shared directories for this class before and had no issues.
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Apr 21, 2013
I'm trying to type out whatever is in the .txt document, but I cannot open it for some reason. My code is
Code:
int main(int argc, char *argv[]) {
char ch=0;FILE *fp;
fp=fopen("C:UsersPCDesktopNew folderQuestion 5one.txt",'r');
while(ch!=EOF){
printf ("%c", ch);
ch=getc(fp);
Sleep (200);}fclose(fp);
return 0;
}
I keep getting an error with my fp=fopen so how do you open the text? Do i have anything else wrong with my code.
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Jan 29, 2014
This my deposit function, i want to open the file (balance), then add the sum and store in on the text file.
float deposit( int x, int currentBalance) {
cout<<"
"<<endl;
cout<<"Welcome to the deposit area"<<endl;
cout << "Your new balance is:" << balance <<endl;
[Code] ....
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Nov 14, 2013
I need to create a text file that looks like:
first line
second line
third line
forth line
fifth line
sixth line
I want to replace the third and forth lines with three new lines. The above contents would become:
first line
second line
new line1
new line2
new line3
fifth line
sixth line
How can I do this using c++?
never was taught file function in c++
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Feb 2, 2014
I'm having trouble opening a file from a specific location.
#include "maidcafe.h"
....
char directory[80] = {"C:UsersPublicDocumentsAnime NotesTransaction"};
char code[20];
printf("Enter file name");
gets(code);
strcat(directory,code);
system("start "" %s",directory);
i thought this would work, but it didn't xD. I got an error
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Apr 19, 2014
I have the following complete code in c++
Code:
void GetMapData () {
MapPair NewMap;
string TempString;
BOOL SkipReadLine = FALSE;
//------
char buffer[MAX_PATH];
std::fstream File;
[code].....
The problem is that I do not want to have an external MapData.txt, rather I access it through a embedded text resource, which in this case I have no knowledge on doing so.
I have the following snippet which demonstrates to my knowledge on how to access a text resource; however, I do not know hot to modify the code above to implant this, but to still have the same functionality as the original code above.
Code:
HRSRC hRes = FindResource(GetModuleHandle(NULL), MAKEINTRESOURCE(IDR_TEXT1), _T("TEXT"));
DWORD dwSize = SizeofResource(GetModuleHandle(NULL), hRes);
HGLOBAL hGlob = LoadResource(GetModuleHandle(NULL), hRes);
const BYTE* pData = reinterpret_cast<const BYTE*>(::LockResource(hGlob));
note that I am compiling with a MBCS.
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Nov 5, 2013
I am in an "intro" C++ course and am having trouble with a section of my current project.
We are required to open a text file, read the data from that file, and print it back.
However, we are supposed to let the user input the name of the file that is to be opened. This is the code I have so far. It is not opening anything.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
const int NUM_QUESTIONS = 30;
typedef char CharArray[NUM_QUESTIONS];
string fileName;
[Code]...
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Jun 11, 2014
I have a .txt file which I want to read from and then write a new text file, this time with sorted lines. It is easy to sort one value, but what about sorting entire lines based on one value?
I want to sort the lines based on the FIRST value.
Example text file contents:
values;data
5.01 100
2.9 342
2.69 43534
10.1 43
6.8 45324
Output: Text file containing
2.69 43534
2.9 342
5.01 100
6.8 45324
10.1 43
It's easy to do this if there was only 1 number on each line, but I do I sort all the lines based on the first number in each line?
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Jun 7, 2013
How can i delete a line from a file created using a C++ program?Can i get a code sample.
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Jan 29, 2015
The program i wrote can run but did not work. I want to delete a line from the textfile "StaffList.txt" but when i cin the name, for example "Ben". After the program ran finished and i open the textfile, the name "Ben" and the whole line is still inside the textfile! I have created the "temp.txt" file before i run the program.
//information inside the "StaffList.txt"
James S1325685J12580
Peter S8856325K52650
Ben S1025639Z85250
Ken S9052365B74100
Marry S9352654I75320
John S7754852H99630
Jenny S7042525L74530
May S1256985G15960
Betty S1135565K56360
Kyle S9545530A1234100
[code]....
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Feb 9, 2014
I need to store the last 3 deposit that I have in my deposit. I have few option but i dont which would be easy
1.Store all deposit to the text file (store always in a new line), and display the last three deposit from the text file.
dep 1 - 60
dep 2 - 40
dep 3 - 100 print 100
dep 4 - 50 print 50
dep 5 - 50 print 50
2. I think this option is more difficult, when it reach deposit 4, to get rid deposit 1
So when i make a deposit 4, the deposit 1 get's ride
dep 2 - 50
dep 3 - 100
dep 4 - 70
Right now i can only display one deposit (last one), then i close the program and run again and i make another deposit it overwrites a new deposit.
My code.
To show sure my deposit that has been made.
double depSave () {
int option;
float dep1,dep2,dep3;// Declare your variables
dep1 = dep2 = dep3 = 0; // Set them all to 0
system ("cls");
string path = "deposit.txt"; // Storing your filename in a string
[Code] ....
Where is says "save deposit" in comment that where it saves to the deposit text file, that going to be output to the depSave function.
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Aug 16, 2013
I am making a script to read the latest from a text file. It picks up the line by numbytes in fseek, but the data line may vary and numbytes not be accurate, how can I fix this?
And another problem is that the line has, date, time, value, separated by space, how to read that line and put these 3 information in variable?
#include <stdio.h>
#include <conio.h>
int main() {
FILE *arq;
char Line[100];
char *result;
int tam, i;
// Opens a file for READING TEXT
arq = fopen("temp.txt", "rt");
[code].....
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Dec 16, 2014
I'm trying to make a simple phonebook app that can show contacts, add, and delete. I'm pretty new to C++ and fstream functions, deleting a line in my bool erase() function?
#include <iostream>
#include <conio.h>
#include <string>
[Code].....
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Dec 24, 2013
I have a text file like this
0 1 2 C
10 1 2 S
7 1 2 C
11 1 2 S
9 3 43 C
10 3 43 S
1 3 43 C
101 3 43 S
with this code
ifstream in("fout2.txt");
if (in) {
vector<string> lines;
string line;
while (getline(in, line))
[Code] ....
I obtain this result
0 1 2 C
1 3 43 C
10 1 2 S
10 3 43 S
11 1 2 S
101 3 43 S
7 1 2 C
9 3 43 C
but i want a result like this :
0 1 2 C
1 3 43 C
7 1 2 C
9 3 43 C
10 1 2 S
10 3 43 S
11 1 2 S
101 3 43 S
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Feb 23, 2014
I have attached the file that I need to read into a data structure. In the example I am just printing it to the screen. This following code has worked for me before, but now isn't. I have tried in visual studios, and on unix, and neither are running it. I ultimately need it to run on unix.
Example file:
word
book
programming
Here is my function to read in the file.
ifstream file;
string line;
file.open("words.txt");
if(file.is_open()){
while(!file.eof()){
getline(file, line);
cout << line <<endl;
}
}
file.close();
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Apr 23, 2014
I am writing a program for AES Encryption which is all but done as far as that the program encrypts the text and prints the encrypted text in the command prompt:
void main() {
int a;
unsigned char CipherKey[16] = {0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C};
unsigned char PlainText[16] = {0x32, 0x43, 0xF6, 0xA8, 0x88, 0x5A, 0x30, 0x8D, 0x31, 0x31, 0x98, 0xA2, 0xE0, 0x37, 0x07, 0x34};
for(a=0;a<16;a++)
[Code] ....
Encrypted text output on command prompt = 39 25 84 1d 02 dc 09 fb dc 11 85 97 19 6a 0b 32
However, my project asks to "read blocks of data from a data file". Therefore I need to alter the main function to read the following arrays from a data file.
Unsigned char CipherKey[16] = {0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C};
unsigned char PlainText[16] = {0x32, 0x43, 0xF6, 0xA8, 0x88, 0x5A, 0x30, 0x8D, 0x31, 0x31, 0x98, 0xA2, 0xE0, 0x37, 0x07, 0x34};
Firstly, I don't know how to take each individual part in the data file to store into each byte in the array i.e. 0x2B into CipherKey[0] of the array.
Secondly, How do I deal with the fact that each byte is in hexidecimal? How should my data file look?
this is what my data file Input.dat looks like at the minute:
0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C
0x32, 0x43, 0xF6, 0xA8, 0x88, 0x5A, 0x30, 0x8D, 0x31, 0x31, 0x98, 0xA2, 0xE0, 0x37, 0x07, 0x34
The first line being the CipherKey array and the second being PlainText. I'm not sure if the '0x' or the commas are required.
I basically want to take the data from a file, store them in arrays in the program itself, encrypt the Input array PlainText and create a new file with the encrypted output array stored in it (I will deal with this part of the program after I get the input file done first).
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Feb 9, 2012
Why this code outputs 7 lines (the last line twice) while the file contains 6 lines?
cout << "read msgfile
";
ifstream msgfile ("script1.msg");
while (msgfile.good()) //if not at end of file, continue reading {
// load vector with deffile
msgfile >> line;
vectormsgfile.push_back (line);
cout << line << "
";
}
msgfile.close();
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Jun 6, 2013
I build this function in my C++ code. I run the on a UNIX box, build HTML file to use in Windows.
In HTML file building code, I have only a string variable hold the contents of this text file (from unix) & add it into HTML file.
The issue is that when I view the HTML file on windows, it shows all the lines in the text file as one line. I think it lost the CRLF.
My question is when I add lines from text file (reading one line at a time) in UNIX, how do I maintain CRLF ( ) in the stringstream variable so that it will display on HTML in Windows properly, all the lines as it is in unix.
I am aware UNIX uses for line end.
string TextFileToString(string filename) {
string line;
stringstream dosString;
ifstream inFile;
[Code] ......
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