C++ :: Delete A Line From A Text File
Jun 7, 2013How can i delete a line from a file created using a C++ program?Can i get a code sample.
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C++ :: How To Delete A Line In A Text File
Jan 29, 2015The 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]....
C++ :: How To Delete A Line From Text File Using Fstream
Dec 16, 2014I'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].....
C/C++ :: Delete Specific Line In Text File Using Program?
Feb 6, 2014Some codes to delete a text in a specific line in a text file.
Example:
This is line 1
This is line 2
this is line 3
Removing line 2,
This is line 1
This is line 3
//////////////////
C/C++ :: Delete A Line From A File?
Oct 19, 2014#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
[Code]....
assume here the list that i output alice wonderland,8563 capitain jack,842 john carpenter,753leisely chow,421 how do i delete "john carpenter, 753" and rearrange my list in the file like alice wonderland,8563 capitain jack,842 leisely chow,421 i have read about remove function, but it only removes the hole file, but i want to keep the file only modify the lists in the file
C/C++ :: Delete Text From File And Than Shift The Rest Of The Text Upward
Aug 31, 2014i want to create 100 gmail accounts instantaneously....what i want from you guys is i have written a program that create a text file i want that once i give the program the imput of 1 it should delete the first 3 lines from the file i.e. the first account details coz that is already been created and shift the rest of it 3 lines upwards after that i'll write a javascript that will automatically fill and create the accounts with those names in web browser.....my lil program is here:
#include <stdio.h>
#include <conio.h>
main()
[Code]....
C++ :: Program To Delete The Sixth Line From A File
Nov 18, 2013 How to use these functions: fread, fclose, fseek, ect.
Q1) Write a program to delete the sixth line in a file. Do not change the sixth line to a blank line; delete it completely.
*** this one I was able to replace the file with what I wanted but realized it needs to be deleted ***
Q2) Write a function that deletes the last line of any file.
*** this one didn't even know where to start ***
Visual C++ :: Detect ItemID And Delete That Line From File
Oct 14, 2013I have a text file name fruit.txt that contains the following information of fruit id, fruitName and fruitQuantity.
Code:
1:pear:30
2:apple:20
3:banana:24
4:orange:15
5:watermelon:35
If let's say I key in 2, it will search for the id=2 and delete the whole line and the id of banana which is orignially 3, will become 2 and orange which is orignally 4 will become 3 etc.
I researched on how it can be done and most suggested to put inside a vector and fout the line.
I know how to put the values in the vector but how should I go about searching for the id and if the id is found it will delete that line inside the file.
Code:
ofstream fout;
ifstream readFile("fruit.txt");
while (getline(readFile, line)) {
[Code]....
C++ :: Read Line By Line From Text File To String
Jul 5, 2013I 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'
C/C++ :: How To Get Last Line 10 Char In Text File If Last Line Is Null
Aug 24, 2013I 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)
C :: Record Data (add / Delete) In Text File
Aug 24, 2013I'm still learning intro to C language. Currently I'm having problem with my code. The task is to ask user to input information about staff and write them into a text file. The problem occur when:
1) output in text/.exe file display random characters.
2) Data obtained from New_Staff unable to pass into Export_Profile.
3) a new output will overwrite the existing information in the text/.exe file
4) the delete function unable to delete correctly after the first time i delete a staff information in text file.
The code is as follows:
#include <stdio.h>
#include <stdlib.h>
void Menu();
void New_Staff();
void Delete_Staff();
void Export_Profile();
[Code] ....
C++ :: Dynamic Memory (array Of Char) - Delete All White Spaces In Text File
Feb 8, 2014General Purpose: Delete all "white spaces" in text file, until the read-in char is _not_ a whitespace (mark as start of text file).
Problem: Cannot seem to shift char's over properly. (I think my problem is the inner loop - however other code may lead to this problem - I do not know)
Code:
#include <fstream>
#include <iostream>
using namespace std;
bool trimWhiteSpace(fstream &file, char * charMemoryBlock) {
if (!file.is_open()) {
[Code] ....
C++ :: Read From A Txt File And Then Write A New Text File With Sorted Line
Jun 11, 2014I 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?
C++ :: Possible To Store A New Line At The Above Of Text File
Feb 9, 2014I 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.
C++ :: Read Last Line Text File?
Aug 16, 2013I 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].....
C++ :: Sort Text File By First Number Of The Line
Dec 24, 2013I 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
C/C++ :: Reading In A Text File With New Line Delimiter?
Feb 23, 2014I 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();
C/C++ :: How To Put A Line Of Text File Into Array For Encryption (AES)
Apr 23, 2014I 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).
C++ :: Reading Text File - Extra Line
Feb 9, 2012Why 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();
C :: Open New Text File With First Letter Of Line On A Certain Directory
May 23, 2013I'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");
C++ :: Read Text File To Stringstream But Keep Line Feed
Jun 6, 2013I 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] ......
C++ :: Use Find Function To Search For A Line In Text File
Oct 28, 2013I'm trying to make a program that will search for a line in a text file using a non default delimitor at the start of the line. An example line in the text file would be as follows:
F Mary Smyth, 19, United Kingdom
I have been able to use the find function to search for and return the 'F' character but would like it to then display the whole corresponding line. Is this possible with the find function?
ifstream readFromFile("data.txt");
string Destinations[1] = {"F "};
string data;
while(!readFromFile.eof()){
getline(readFromFile,data);
[code]...
C++ :: Removing All White Space From Line Of Text File?
Jun 30, 2014this is the code I tried in my code block 10.05.....tried code for removing all white space from a line of a txt file. this is my code it runs but i cant get the result i need.
#include <iostream>
#include <conio.h>
#include <fstream>
#include <string>
[Code].....
C++ :: Reading Group Of Numbers Per Line In Text File
Mar 27, 2013I am working on a project for school that has us read in a text file that contains 8 lines of SSN and grades. I am not sure how to go about reading in the lines and differentiate between the SSN and grades in the calculations.
View 1 Replies View RelatedC++ :: Reading From A Text File - ID And GPA In Same Line Separated By Comma
Nov 9, 2013I tried to read in a file that contain studentId(8 integer long) and GPA in the same line separated by a comma, but I couldn't. Example:
145453565, 4.0
34344443, 3.9
23454345, 3.4
12345678, 3.4
void studentRecord::loading(string filename) {
ifstream infile;
int studentId;
double GPA;
[Code] ....
C++ :: Read Text File - First Line Has Extra Char
May 21, 2012When I read a text file. I'm reading a list of strings in text file, with one string per line. The first line has extra characters in the string, the rest of the lines read are fine, and I can't understand where the extra characters come from. The file format is this...
A
AA
AAN
AAP
AAPL
AAWW
AAXJ
....
...
Code:
std::vector<std::string> strSymbolList;
std::string s = "";
std::ifstream infile( m_strFileSymbols );
while( std::getline(infile, s) ) {
strSymbolList.push_back(s);
}
infile.close();