I started learning programming a few days ago and i'm having trouble with reading each line from a listbox this is the code i'm having trouble with
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public string[] getFlies
{
get;
set;
[Code]....
What am I doing wrong?
I'm reading strings one after another and trying to split it using strtok_r. This doesnot seem to be working
I have a .gz file from which I'm reading the data into the buffer in chunks.
The below code works fine only for the first chunk on data. Later it just breaks out.
while(1) {
char buffer[SIZE];
int bytes_read = gzread (f, buffer, SIZE - 1);
[Code] .....
I need to add either one author or a list or array of authors to my sql table. Here is the code that is used to insert the authors into the table:
The code from the listbox:
<asp:ListBox runat="server" ID="AuthorList" DataTextField="AuthorName"
DataValueField="AuthorName" DataSourceID="Authors" SelectionMode="Multiple"/>
Datasource code:
<asp:ObjectDataSource runat="server" ID="ds_InventoriedAuthors"
SelectMethod="GetAuthors" TypeName="CntyLibrary.Inventory.Authors" InsertMethod="AddAuthors">
<InsertParameters>
<asp:QueryStringParameter Name="AuthorID" Type="Int32" QueryStringField="id" />
[Code] ....
How can a mulitline string be read line by line
ex: str = "PERIOD="week"
DAY="day"
TIME="time"";
I'm using fgets which will read a single line at a time, but unlike fgets I don't want it to return the new line char ( ) ?I want to be able to use printf to display the lines next to each other.
View 7 Replies View RelatedI 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'
I need to read a text file which has various lines containing integers. I need to write those integers separately in a vector. Example, the first line of the text file contains 3 9 8 7 6 so vector[4]=3, vector[3]=9, vector[2]=8 and so on. Next read the second line 4 1 2 3 4 5 and write to another vector vector[5]=4, vector[4]=1...
I tried the code below but it will write from the second line, the whole line in one vector index.
int str; // Temp string to
cout << "Read from a file!" << endl;
ifstream fin("functions.txt"); // Open it up!
string line;
// read line count from file; assuming it's the first line
getline( fin, line );
[Code]...
I have an external file with one column of data. If I have a counter value let say counter =1, and counter++ and so on. How I can write such a c++ code that if the value of counter and value from the external file are same then generate an action let say cout both values i.e. value of counter and value from external file.
for more information, here is an example:
data in file(in one column): 2 6 8 9 10...
value of counter : 1 2 3 4 5 6 7 8 9...
then cout values only if value of counter and value from the file is same.
Here is my code so far, but it does not seem to work;
#include<iostream>
#include<fstream>
using namespace std;
int main() {
const int SIZE = 10; //Size declaration of array
int hours[SIZE]; //Array declaration
[Code]...
I am reading my file (20GB) line by line using boost like this
PHP Code:
boost::interprocess::file_mapping* fm = new boost::interprocess::file_mapping("E:Mountain.7z", boost::interprocess::read_only);
boost::interprocess::mapped_region* mr = new boost::interprocess::mapped_region(*fm, boost::interprocess::read_only);
char* bytes = static_cast<char*>(mr->get_address());
An exception is thrown in the second line while allocating memory for mr.
I use boost because it can also work in Mac which my code will be ported to.
I'm just getting back into the swing of things after a long time of not programming. I'm trying to create a program which takes in command line arguments and prints the last one. My code is as follows:
#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main() {
string x;
vector<string> arguments;
[Code]...
And the error message I receive, a simple but frustrating one, is as follows:
Enter arguments, enter STOP to stop: Segmentation fault...
Okay so i have everything right accept transfering the selectedindex from listbox in form1 to listbox in form2. I am using the below string item to hold the selected line of the list box, with the intent of recalling and then adding it into the form2 listbox. I get a not implemented error and i can't figure out why. I know the information is moving with the variable item, it just doesn't get printed out to the new listbox.
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
string item = listBox1.SelectedItem.ToString();
Form2 form2 = new Form2();
form2.Show(item.ToString());
[Code]....
Reading a .dat file, i'm unable to open the file. This program is for a Air Quality index detector, the AQI machine records the particle concentration every minute and saves it into new data file for each day. So I need to make this program run every minute and convert the concentration in to the AQI readings.
The filename is of the format "ES642_2013-11-09.dat", where ES642 is the software name of the machine, and rest is the year, month and day. The code here is just for the file reading section:
Code:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
[Code] .....
here is my code, I'm trying to read a .txt file into a 2D array... what's wrong with my code?
Code:
#include <stdio.h>
#define INPUT_FILE_GET_NAMES "names.txt"
#define INPUT_FILE_GET_SALES "sales.txt"
#define MAX_ROWS_NAMES 25
#define MAX_COLS_NAMES 20
#define MAX_ROWS_SALES 25
#define MAX_COLS_SALES 6
//Function Declarations
char getNames(char namesArray[][MAX_COLS_NAMES], char filename[]);
[Code]...
Once it gets to string name = fileWrite.ReadString(); in write file it throws this exception about unable to read beyond the end of the stream.
static void Main(string[] args)
{
WriteFile();
ReadFile();
[Code]....
I've been trying to read a .txt into a linked list in the attached code. I'm running into problems, specifically I'm getting errors on line 41 (curr->word=charTemp. I'm trying to set the word array equal to the charTemp array. I've tried strcpy with no luck .
Code:
#include <stdio.h>#include <stdlib.h>
#include <string.h>
//Struct for linked list
typedef struct node {
char word[25];
struct node *next;
} node;
[Code]...
This code works, but not fully This code reads com ports, when a string is available, I check to see if it contains some keywords defined in array If it does, i print out the string itself.
The problem i am having is that it seems to stop processing the data at some point but I do know that there are more strings to be read. So, it does keep reading more lines of data
using System;
using System.Text;
using System.Collections.Generic;
[Code]......
I have an *.lct file. I like to read *.lct file and save an bmp image.
I can not read this file using usual file read.
Code:
void CLCTtoBMPDlg::OnBnClickedReadlctfile() {
CFileException CFileEx;
CStdioFile ReadFile;
CString OpenlctfilePath;
TCHAR szFilters[]= _T("LCT Files (*.lct)");
CFileDialog fileDlg(TRUE, _T("bmp"), _T("*.lct"), OFN_FILEMUSTEXIST | OFN_HIDEREADONLY, szFilters);
[Code]...
Find the attachment. change the file extension *.lct instead of *.txt. I like to read ASCII Data into Hex, Example : Data "A" as "41" (Refer the jpeg image). How is possible?
I am having trouble in reading data from my text file and print it out exactly like how it looks like in the text file. The problem im having is it will not read the last y Coordinates of the point. it keep reading the second last point for y coordinates which is wrong.
my text file is
0.0 0.0
0.0 1.0
1.0 0.0(but it read until here)
0.0 0.0(suppose to read the last point which is here)
For your information, this is my 1st year degree assignment in C programming. It is to create a program which can read text file (manually create) and print it out in a program and calculate the area for the polygon using ADT function ( .c and .h files)
*This is the code for my read file function*
Basically this accepts a Polygon and a file pointer as parameters. It reads the polygon point data from the file, pass the read data to plg_new() to create a new Polygon and returns the new Polygon created.
Code:
polygon *plg_read(polygon *New_polygon, FILE *Coord) {
int i;
int numberofvertices=0;
int count=0;
char filename[50];
double xCoor[50], yCoor[50];
[Code]....
This is the second function my polygon new code. This ADT function basically creates a new Polygon with malloc(), initialize all ADT data members with its parameter values and returns the Polygon.
Code:
polygon *plg_new(double *xCoordinates, double *yCoordinates, int numberOfVertices) {
int x;
polygon *New_poly = (polygon *)malloc(sizeof (polygon));
if(New_poly->xCoordinates == NULL || New_poly->yCoordinates == NULL) {
free(New_poly);
[Code]....
This is the rest of the code if you need to refer to other codings.
Code:
/**
*@file polygon.c
*@brief Functions for polygon / Struct has polygon numberOfVertices, polygon *xCoordinates and polygon *yCoordinates
*@author: Tan Xian Yao
*@id: 4323440
*@date: 22/04/2014
*/
[Code]...
I am new to C++ and I am having an issue reading in a 2 Dimensional array from a data file. I am very close to reading it in perfectly except for one issue, the loop is ignoring the first value from the data file.
This is the code I have so far:
#include <iostream>
#include <string>
#include <cctype>
#include <algorithm>
#include <functional>
#include <conio.h>
#include <iomanip>
#include <string>
#include <fstream>
[Code]...
This is the values from the data file:
300 450 500 210
510 600 750 400
627 100 420 430
530 621 730 530
200 050 058 200
100 082 920 290
When the Program shows my array it comes up as:
450 500 210 510
600 750 400 627
100 420 430 530
621 730 530 200
050 058 200 100
082 920 290 0
Every array location is moved up one, like the program just completely ignored the 300 at the beginning.
In a .h file there is a function that takes in this parameter:
void (^callback)(float * arg)=NULL
as in a function definition:
void func(void (^callback)(float * arg)=NULL);
What I am able to read is that it takes a function pointer and if not defined it overrides with NULL. The part I do not get is the ^ in (^callback). I only know ^ as a bitwise XOR operator. It also generates issues in my VS2012 compiler (something with CLR). So I would really like to rewrite this part to something else, without the bitwise operator...
I have been struggling to read a certificate in windows store from C++ DLL, but its not happening. from console application I can but when same code built as a DLL and tried to access from a separate console application. I think its not going to windows store to read the cert.
pCertContext = CertFindCertificateInStore((HCERTSTORE)*pCertStore, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_ISSUER_OF, operator PCCERT_CONTEXT(), pCertContext);
int Error = GetLastError();
if (Error == 0)
LINFO << "
Signtuare is valid
";
else
LINFO << std::hex << Error << '
' << "GetLastErrorStdStr=
" << GetLastErrorStdStr();
it returns 80092004 GetLastErrorStdStr= C a n n o t f i n d o b j e c.
I want to be able to read 2 line input, then safe them in separate arrays.
line1 input=array1
line2=array2
How do i read the end of the line in a txt or dat file? I treid using fscanf in a while loop like this
Code:
while(fscanf(pfile,"%c") != EOF && fscanf(pfile,"%c") != '') {
char c = ' ';
fscanf(pfile,"%c",&c);
str += c;
}
The reason why its important to stop after each line is that i need the program to read the data from each line separately.
I want to store the address of a customer (with spaces) in a char variable (say cadd). First I tried to use "cin", as we know it reads until it sees any whitespace. So it reads only first word before a white space. So, I used "getline()" function. But when I used it, It didn't wait for the I/P (it skipped it).
char cadd[20];
std::cout<<"Enter Customer Address:
";
std::cin>>cadd;
std::cout<<"Enter Customer Address:
";
std::cin.getline(cadd,20);
I have been working on a program to scanfile and whenever it encounters what the user wanted it prints it, and it is all right less the first line of the file that the program jumps,
Code:
#include<stdio.h>#include<string.h>
#include<stdlib.h>
void main()
{
unsigned int j=0 ;
char num[100] , str1[100], str2[100];
FILE *fp;
[Code]....
Here's my code, it's for a poker hand evaluator
input:
'ad 2d 3d 4d 5d...
...4s 5s 6s 7s 8s'
I think it should go through all the 10 crads and disply the name of each card, but it seems to only do it for the second hand
Code:
include <stdio.h>
#include <ctype.h>
int main( void ) {
char inputtedhand[64];
int z=0, counter=0;
int index;
int i=0,m=0,n=0;
[Code].....