C :: Read File Contents From EOF
Jan 8, 2014How can I read contents of a file from the last character? Can I use a loop?
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C :: Read Contents Of A File Using Low I/O Read Statements
May 15, 2013I want to read the contents of a file block (512 bytes) by block using low I/O read statements. Each record is 64 bytes long and has a pre-defined structure. The first 4 bytes are an unsigned integer; the next 20 bytes are ascii text, etc.
I have a buffer which I can access with buf[0] to buf[63] to read the first record and then buf[64] to buf[127] for the second, etc. However, I was wondering how to map a record so that I can refer to an integer as an integer and a float as float, etc. I can't create a struct and move the 64 bytes to it, as I will have alllignment/padding problems.
What is the standard way to deal with records in C?
C++ :: How To Read XML File Contents In CPP
Jan 30, 2015I need a sample program to read contents of any xml file using CPP.
View 2 Replies View RelatedC :: How To Read Data In A File And Print It Then Copy Contents To A File
Mar 8, 2013Code:
#include <stdio.h>
#include <stdlib.h>
int main (int argc, char *argv[])
{
char buffer[256];
FILE * myfile;
myfile = fopen("read.txt","r");
[Code]...
I also got an error in printing wherein the data in read.txt is "Hello" newline "World" and my program prints world twice.
C++ :: Read A Text File And Store Contents Into 2D Array?
Aug 2, 2014read a text file and store the file contents into a 2D array?
100 101 102 103 104 105
106 107 108 109 110 111
112 113 114 115 116 117
118 119 120 121 122 123
124 125 126 127 128 131
Here's my code:
const int ROWS = 5;
const int COLS = 6;
int array[ROWS][COLS];
ifstream inputFile;
inputFile.open("table.txt");
[code]....
When i run the program and try and display the array, it doesn't work.
C++ :: Program To Read In Reverse Order Contents Of A File
Jan 5, 2015Need to correct the errors. i've done so far.
#include<iostream>
#include<fstream>
#include<cstdlib>
#include<iomanip>
using namespace std;
int main() {
ifstream fin; char ch; int size=0;
[Code]...
C :: Read Txt File And Print Contents Numbering Each New Line Of Text?
Apr 25, 2013I have written the following code but i am stuck. Write a program that will prompt the user for a file name and open that file for reading. Print out all the information in the file, numbering each new line of text.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <ctype.h>
int main()
{
char line[81], filename[21], c;
int i = 1;
FILE *inFile;
[code]....
C# :: Creating Service To Monitor And Read Contents Of File From A Folder
Feb 10, 2015 am trying to create a service that will try to create a service that will monitor a folder. Whenever a new file gets created, I am trying to read the contents of new file and copy contents (with same file) at a new location.
The problem I am facing is that only first file that gets its name copied and a file created at a new location, but without any contents. The subsequent files do not get created at all.
My Services.cs looks like this:-
public partial class Service1 : ServiceBase
{
public Service1()
{
[Code]....
C/C++ :: Read Contents From A File And Use As Size Of 2D Array - Error C2087 And C2133
Oct 20, 2014Goal:
Read contents from a file and use as the size of a 2d array.
Problem:
C2087: Line 27 : "a1" : missing subscript
C2133: Line 27 : "a1" : unknown size
Code :
int rows;
int columns;
ifstream fObject("inputdata.dat");
fObject>>rows;
fObject>>columns;
char a1[rows][columns];
I am not sure why this is occurring, or if there is a better way to do it.
C :: Read Enormous Binary Files (10-100GB) And Parse Their Contents Bit At A Time
Dec 5, 2013I am trying to read enormous binary files (10-100GB) and parse their contents a bit at a time. As part of the process I need to get the size of the file in bytes. The simple solution
Code: fseek(file,0,SEEK_END);
size=ftell(file);
fails because the file size overflows the long int type returned by ftell. I need a long long int.
Is there a reasonably efficient way to do this? The good news is that it only needs to be done once. I suppose I could read it one character at a time until I hit the end and keep count, but that just seems inelegant...
C :: Printing Contents Of A File - Prints One Extra Character Not Present In The File
Feb 12, 2013I'm writing a program that stores records into a file and then these records can be printed out. A last name, first name, and score is stored to be exactly 36 characters long (using leading spaces to pad) making it easier to retrieve specific records. For example, three records stored in the file would like like this: (the underscores are simply to illustrate the distance, they are not in the file itself)
_______lastname_______firstname__90__________lname __________fname_100___________last___________first __60
When printed out, the names are formatted as follows:
lastname, firstname: 90
lname, fname: 100
last, first: 60
However, when I print them out this is what I get:
lastname, firstname: 90
lname, fname: 100$
last, first: 60H
For some reason, for any record after the first, an extra character is added to the end. These characters are not in the file, so I was thinking that the array for some reason wasn't being filled completely, (the array is initialized to size 36 and 36 characters are read from the file using fread) so it was printing out a random character assigned to the 36th array position. Except the character never changes, (always a $ for record 2, H for record 3, l for record 4 if i remember) and I've tried reducing the array size or the number of character read and it's the string that gets altered, the random character always remains. I figure the problem must be in the print_records function (appending seems to work no problem). Anyway here is my print records and appending records code.
Code: /*
- Prints a single record stored in the file pointed to by ifp.
*/
void print_record(FILE *ifp, int record) {
[Code]......
C++ :: Encrypting Contents From File And Saving To Another File
Mar 17, 2013Right now I'm working on an assignment where I need to take the data from on file encrypt it by adding 5 to each byte and then save it to a user specified location. I think I'm close to having it done but I've run into a hick up. After I get the user input for where the encrypted data should be saved the program seems to never end. This is the code I have so far
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
ifstream input;
ofstream output;
[Code]...
C++ :: Get Output From File Contents
Dec 30, 2013#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>
#include<fstream.h>
#include<graphics.h>
void input();
void output ();
[Code] ....
C++ :: Zero In List Contents And Multiset Contents
Apr 24, 2015HTML Code:
So I insert values from a vector into a list and into a multiset, and I noticed zero is added to their contents! I had to do a whole lot of debugging to find out where the error was, how can i stop this thing? Code which generates such error...
infact i checked the content of vector ups to be sure that there was no zero in it, but after loading into list combi_t * head, it seems like there was a zero added and this is giving me errors when i call function master_roller...
Code:
void ins(combi_t * &testa, int &numero, int &num, int &no)
{ // if (ricerca(testa, numero) == 0)
//{
combi_t *temp = new combi_t;
temp->val0 = numero;
temp->val1 = num;
temp->val2 = no;
temp->nextPtr = 0;
[Code] ....
C :: Return File Contents As String?
Oct 1, 2014I am trying to code a function which will read a file on system and return its content back as string. Code is below.
Code:
char * readtxt(){
FILE * fptr;
char c;
static char txt[30];
[Code]....
I suppose txt variable is pointer. But I need to return the file content as string so the function structure should look like
Code:
returnType function(){
return "File Contents as String";
}
C :: Show Contents Of A File On Screen
Nov 22, 2013The aim will show on the screen but does not show the contents of a file on the screen different shows.
Code:
#include <stdio.h>
#include <conio.h>
main() {
char filename[100];
double xx;
int ii, kk;
[Code] .....
C++ :: Writing Pointer Contents Into File
Apr 15, 2014I have a character pointer that points to 4000 bytes of valid data. I need to write these valid contents pointed to by this pointer into the file. I am looking for the most optimized way of doing this. I am using the below logic which seems trivial. Any better approach to accomplish the same?
/* length is the number of valid bytes of data */
void parse_contents(const char *data, int length) {
int j = 0;
char path[1024] = "/tmp/data.xml";
FILE *fp = NULL;
fp = fopen(path, "wb");
[Code] ....
C++ :: File I/O Not Recognizing Contents Correctly
Nov 17, 2014I have a program that's not doing what I want it to do. This is the assignment:
The nth term of the sequence of triangle numbers is given by, tn = 1/2 n (n+1); so the first ten triangle numbers are:
1, 3, 6, 10, 15, 21, 28, 36, 45, 55,...
By converting each letter in a word to a number corresponding to its alphabetical position and adding these values we form a word value. For example, the word value for SKY is 19 + 11 + 25 = 55 = t10. If the word value is a triangle number then we shall call the word a triangle word.
the 'words.txt' has a bunch of words in this format:
"ABSTRACT"
"YOUTH"
there's about 1000 words in that format.
And for any triangle words I find, I put it into another text file which I called triangle.txt.
Now for my program, it pulls the 'words.txt' file just fine but it doesn't recognize any of the words in the file as triangle words.
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <cmath>
#include <cstdlib>
int getCharValue(char a);
double sum1(std::string name);
[code]....
C++ :: Copying Binary FILE Contents Into Another
Jan 10, 2013How does one go about copying one binary FILE variable to another in C++? Say I have the following:
FILE* tempFile; //is a binary file and assume already filled with contents
FILE* localFile;
tempFile, as the name implies, is stored in a temporary directory (AND has a randomized temp name) within Windows and I want to copy its contents to another file with a predefined name that is within a valid local directory (e.g. C:UsersuserMy Documents est.exe). What do I have to use?
C/C++ :: Return File Contents As String
Oct 1, 2014I am trying to code a function which will read a file on system and return its content back as string. Code is below.
char * readtxt(){
FILE * fptr;
char c;
static char txt[30];
int len=0;
fptr = fopen("C:UsersTestDesktopDev est.txt", "r");
[Code] ....
I suppose txt variable is pointer. But I need to return the file content as string so the function structure should look like
returnType function(){
return "File Contents as String";
}
How can I achieve this ?
C :: Losing Contents Of A String Between File I/O Operations
Oct 24, 2013Here's the code I'm writing:
Code:
#include <stdio.h>
#include <stdlib.h>
char* getTeamCode(char* team);
[Code]....
Why the placement of the code on line 21 above matters.
It grabs the correct string just fine. If I write a printf just below it, it prints the string it should correctly. However, if I do a printf of the string OSUteamCode below the fopen call on line 23, it prints blank.
So the first thing I did was move it below the fopen line. It worked, finding and outputting the first game in "game.csv" just fine, but not the other 11. Debugging with printf shows that the contents of OSUteamCode again disappear after the fopen call in the addLineCSV function.
I'm not understanding why that happens. The only thing I can figure is there's something going on with the file I/O commands that I just don't understand, but I can't find anything online that explains what that might be.
C++ :: Transfer Contents From Text File Into A String
Apr 9, 2014I'm making a program in which it will read an input from a text file and then count the numbers of spaces , characters , words . Here is what i think it would work : First i will transfer the contents from the input.txt into a string , after that i will create 3 strings which contain each of these : spaces , characters , words . Then comparing each of the contents of the intput.txt_string to the other 3 strings .
#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;
[code]....
and of course it doesnt seem to work...
C++ :: Reading From A File And Displays Its Contents On Console
Oct 18, 2014Having some trouble with an assignment. Here is the prompt. Write a program that reads the telephone.dat file and displays its contents on the console. The program should allow the user to add new entries to the file.
I have saved the file into a resource file within visual studio and I am trying to run the code to where the file will be shown when I run the program. I know that the program is running and the file is there because if i misspell the filename it will give me the error message. I don't know how to make the contents of the file display. Here is what I have so far.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
ifstream inputFile;
[Code]...
C++ :: How To Load Contents Of Text File Into Array
May 12, 2013So I am working on a FUSE filesystem and I currently have the need to load the contents of a text file into an array.
My array initialization looks like: char array[max_entries][PATH_MAX] = {NULL}
The reason I want to pass it by reference is that I want my function to return two values essentially. One a specific char* and the other an array like I initialized. My function proto type looks like:
char* load_meta(char* list[max_entries][PATH_MAX], char* path, int mode);
How I'm trying to call the function:
someChar = load_meta(&array, path_name, 1);
Within the function I try to edit the array by deferenceing it once, like this:
strcpy(*list[i], file_entry); // This seg faults
C++ :: Reading Contents Of A File From Command Line
Feb 7, 2014i would like to read the content of a text file data.txt (line by line ) directly from the command line using this command: a.exe < data.txt.
What could be the c++ code to read/get the content of these lines (without using ifstream). The treatment of the lines is not a problem for me but i really don't know how to access the content of the file from the c++ code
C++ :: Text File - Retrieve And Print Out Contents
Jul 25, 2013I've created a text file with the numbers from 1-450. After writing code to retrieve and print out the contents in the text file, the compiler only printed out the numbers 124-450. Is there a reason why this is happening?
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