I'm trying to save a structure to a binary file, then read it out of the binary file into a new structure. I am unsure what is happening but it is not correct.
#include <iostream>
#include <fstream>
using namespace std;
[Code]....
i tried to dave my datagridview to a binary file it worked at first and then when i tried it again it said file is being used by another process.
this is the code that loads the binary file
:
public void loadingparty()
{
string file = Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\mygrid.bin";
if (File.Exists(file))
[Code].....
I'm trying to insert a structure into a binary file, then read it back out into a "temporary" structure and output some values.
#include <iostream>
#include <fstream>
using namespace std;
struct b_tree_node {
int num_keys; // number of keys in this node
int key_val[3]; // key values (0 to num_keys - 1)
int child[4]; // child file addresses (0 to num_keys)
[Code] ....
I would like to write a complete structure array to a file and read it back, recovering all the data. I have tried the following:
Code:
#include <stdio.h>
#include <string.h>
#define NUM 256
const char *fname="binary.bin";
typedef struct foo_s {
int intA;
int intB;
char string[20];
[Code]...
//---------------------------------------------------- but the mac field is reading back some random value repeatedly. Why is that? And how do I fix this?
I am trying to develop a GUI using MFC, but I am having trouble using CFiledialog to save a file. The problem is, the file is not getting saved to the folder when I use the CFiledialog. Below is the code I am using.
Code:
CString szFilter = "XNRep Files (*.xnrep)|*.xnrep||";
CString s = "xnrep";
CString t = "";
CFileDialog fileDlg(FALSE, s, t, NULL, szFilter);
if(fileDlg.DoModal() == IDOK)
{
std::ofstream file;
[Code]....
After the file dialog opens up, I enter the name of the file and select OK button. But the file does not show up in the directory I am saving to.
I'm still reading Prata's book and there is a section where they explain how to write files using the binary mode.
They define a struct
Code: const int LIM = 20;
struct planet
{
char name[LIM];
double population;
double g;
};
planet pl;
And they say you can use the binary mode to write the whole struct at once (in text mode you need to specify every member).
Code: ofstream fout("planets.dat",
ios_base:: out | ios_base::app | ios_base::binary);
fout.write( (char *) &pl, sizeof pl); I don't understand why they use Code: fout.write( (char *) &pl, sizeof pl) instead of just Code: fout.write( pl, sizeof pl)
So i am implementing the class LinkedBinaryTree and i am aplying "Depth and Height" and "A linked structure for binary tree".
#include <iostream>
using namespace std;
// InspectableContainer
template <typename Object>
class InspectableContainer {
public:
int size();
bool isEmpty() const;
[Code] .....
Following is the program I wrote it basically takes 9 inputs and then save them into binary file. then print out the data stored in binary data and find inverse of it then print the inverse out. but its stuck in a loop somewhere.
Code:
#include <stdio.h>
int main() {
int a[3][3],i,j;
float determinant=0;
int x;
FILE *fp = fopen ("file.bin", "wb");
[Code] .....
I wonder are there boost available structures that act pretty much the same as binary heaps of C# in VC++?
like this code snippet in C#
Code:
BinaryHeap<Node> OpenList = new BinaryHeap<Node>();
BinaryHeap<Node> ClosedList = new BinaryHeap<Node>();
Code:
namespace LibAStar {
/// <summary>
/// A binary heap, useful for sorting data and priority queues.
/// </summary>
/// <typeparam name="T"><![CDATA[IComparable<T> type of item in the heap]]>.</typeparam>
public class BinaryHeap<T> : ICollection<T> where T : IComparable<T> {
// Constants
[code].....
#include<iostream.h>
#include<conio.h>
class sum {
int a,b,ans;
public:
void geta() {
cin>>a;
[Code] ....
1st when i fill the things on form then saved in database after saving record when i want add another record it shows an error. after saving it saves new record refresh doesn't work
View 1 Replies View RelatedI'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?
How do you create a save file for a game, that is not a separate file? Specifically I am using code::blocks and sfml 2.1 to make a game and it saves to a text file at the moment. My problem is that it is very easy to modify the text file, and it is annoying to have to copy and paste several files if you want to use a copy of the game. I have a feeling that it may be to do with resource files, but I'm not exactly sure how to get these to work or whether you can modify them dynamically.
View 6 Replies View RelatedHow to save the struct to file and then read it back from the file ?
Code:
#include <conio.h>
#include <stdio.h>
struct student {
int person;
int egn;
float AvergeGrade;
[Code] ....
Have average grade: %f", person[i].FirstName, person[i].LastName, person[i].egn, person[i].AvergeGrade);
}
//Save to file
getch ();
}
what are the codes that will save the data then it will appear in a file (.txt).
I typed the name "SpongeBob SquarePants"
SpongeBob SquarePants
I am creating a program using the inheritance. The superclass is person and subclass is employee,manager etc. I will prompt the user to choose which subclass he want to save the record to but i dont know how to write and display the record of different subclass to and from a txt file.
View 4 Replies View RelatedCode:
struct sth {
char* str;
} pt;
}
[code]...
fprintf does not save string to file. How can I put structure into list?
I have a 4*4 array and a 8*8 arays in my c++ program and i would like to save those arrays in one textfile. How do i do that.
View 5 Replies View RelatedI tried to save some data from my listbox to the text file, but didn't work... I think I tried many combination for code but still didn't work. what to do?
FileStream fs = new FileStream("tx.txt", FileMode.Create);
StreamWriter sr = new StreamWriter(fs);
sr.Write(listBox1.Text); //there is that problem, but I'm not sure how to write for success
sr.Close();
When I have loaded a savefile with Serialize, is there some way of telling the name of the currently loaded savefile?
View 2 Replies View RelatedI have this code, where I capture window and make copy to bitmap of it. I am working on rotation of bitmap. But my problem is that when I save the image to file the result is just a black screen. It looks like there could be some problem either in GdipCreateBitmapFromHBITMAP() or GdipGetImageGraphicsContext()
How to fix it and to get the rotated image?
Code:
// CODE 81 and 82 de facto no difference
#defineCODE85 // 81
#defineWINDOW_MIN_HEIGHT200
[Code].....
My objective is to create a file and save some text in it. But the twist is that file should be created in pdf format.
I have written following code:
Code:
#include<stdio.h>
Code:
int main() { FILE *fp;
char ch;
fp=fopen("file.pdf","w");
fprintf(fp, "%PDF-1.3"); //to initiate data storage in pdf file
printf(" Enter data to be stored in to the file:");
while((ch=getchar())!=EOF)
putc(ch,fp);
fclose(fp);
return 0;}
Now my file is created in pdf format, but when I open it by double click on it, it is not open and gives the message like: "Error in opening document. This file is damaged and could not be repaired."
Which is best option to save images in database or file system, I am developing c++ server client app. I want to save the images in server using file system or database. I am confusing to choose which option?
View 5 Replies View RelatedI have this file that I would like to read into a multidimenstional array in c#: file. If I take the first set of lines as a first example, I would like the print_r to look something like this:
Array (
[SiiNunit] => Array (
[0] => Array (
[nameless.2BB8.4FB8] => Array
[0] => Array (
[bank] = _nameless.2917.43B0
[player] = _nameless.2813.6928
[companies] = 312
[code].....
this (as I expected it to) wrote each line of the file into a 1d array however, I would like it to write it to a multidimensional array.
i am writing a program that requires me to write am input a float and an integer and save it to a txt file. When i try to compile my code i get an error "assignment from incompatible data type". ?
int *intconstant;
float *floatconstant;
int *value;
struct FILE *infileptr, *outfileptr;
infileptr = fopen("/home/brinkmann.brendon/assign14data.txt", "r");
outfileptr = fopen("/home/brinkmann.brendon/assign14report.txt", "w");
[Code]...
I need to have a user option to save a file as either UTF-8 or UTF-16, such as NotePad does. How to get the CFileDialog to display the Encoder drop down selector. How to do this. I am aware the since VISTA there is another API that one can use, but that API is not compatible with pre-VISTA OS 's.
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