C/C++ :: How To Create Function To Delete Record Of Binary File
Aug 17, 2013I want to create a function to Delete , Edit record of Bianry File in C++, I have tried again and gain but not success .
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C/C++ :: Delete Record From Binary File?
Jan 12, 2013How To Delete A Record From binary File - C++ ?
View 1 Replies View RelatedC++ :: Program Code To Create Database Add Delete Record In Ubuntu
Feb 13, 2014i want programcode which can be executed for create database add delete record in ubuntu
View 1 Replies View RelatedC :: 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/C++ :: Student ADT - How To Delete A Record
Feb 24, 2014My assignment for class was to create a Student ADT. I have three files. First one is Student.h which defines a Student record and has the prototypes of the functions that can be used with Student. I have Student.cc which is where the functions are actually declared. And my final file is testStudent.cc where the "main" function is that is creating a Student and callign all of the functions to make sure they work properly.
I have all of the functions working properly, except for my destroyStudentRecord function. It is supposed to deallocate the record, but I am unsure of how to actually do this. The current implementation appears to only deallocate the firstName field, as when you display the record after deallocationg it, everything still shows up except the first name. I have tried deallocating each field of the record before deallocating the record itself and that gave me the biggest list of errors I have ever seen.
I realize the implementation of some things in here might be a bit odd, but this is exactly how we are required to do things for this assignment and nothing about the implementation can really be changed unless something is actually just plain wrong(which is of course a possibility as I am quite new to this!). As I said though, everything else is working exactly as it should be, so my only issue at all is with actually deleting the record once I have created one.
Student.h:
#include <iostream>
#include <cstdlib>
using namespace std;
#ifndef _STUDENT_H_
#define _STUDENT_H_
struct Student {
[Code] ....
C++ :: Binary Search Delete Function
Nov 26, 2013I am having an issue when i try to delete a node with 2 children it either doesn't delete anything, or wigs out in various manners deleting the wrong node or replacing a node with a various memory location. As follows, here is the delete function:
void BST::dele(){
bool found = false;//initialize a bool type to "find" the element to be deleted
if(root == NULL) return;//well if the tree's empty, nothing to be found right?
current = root;//set the current to the root to traverse the tree in search of the element
node* parent;//create a parent node for use once the node has been deleted
while(current != NULL){//traverse the tree
[Code] .....
C# :: Update Then Delete Record In Datagridview
Apr 21, 2015In my project i need to update the attn_dateTimeOut in database.After i updated it will automatic delete the specific row record that had been updated. I had two question:
1) in my database there are a few table is assign not null."attn_dateTimeOut" is a table that haven insert any record. When i update it using below code,it work and can update but it comes out error.Error show "record cannot be null".
2) I want t make it when i updated the "attn_dateTimeOut",it will auto delete the row of updated record.I do usign back code "DeleteRecord" but it nothing change!How should i do?
Here my code:
private void txt_proximity_KeyPress(object sender, KeyPressEventArgs e) {
if (e.KeyChar == (char)13) {
TMPB_attn row_TMPN_attn = BusinessLogicLayer.TMS_GET_PROXIMITY_VALID_TO_USE(txt_proximity.Text);
if (!String.IsNullOrEmpty(txt_proximity.Text)) {
[Code] .....
C :: Search And Delete Function For Binary Trees
Apr 1, 2014I had an assignment that I completed and it was just inserting values into a binary tree and then displaying it. I was wondering what the code would be if I wanted to delete a number in the binary tree, or if I wanted to search for a number. Here is my code for my assignment.
Code:
#include <stdio.h>
#include<stdlib.h>
typedef struct bt_{
int value;
struct bt_ *right;
struct bt_ *left;
[Code] ....
C Sharp :: DropDown Values Are Changed When Delete A Record In GridView
Aug 6, 2012I have a Gridview ,in that one of the Column is DropDownList .I have 10 Records in my Grid and my DropDown Values are like this 1,2,3....10.This is the format to store my DropDown values ,if i delete 4th Row ,then my DropDown Values are Changed like 1,2,3,4....9.This is my task ,but i'm getting this format 1,2,3,--,5...10.
View 1 Replies View RelatedC++ :: Create A Binary File Based On HEX Data
Apr 24, 2013I want to create a binary file based on some hex data :
Ex Input Hex :54313032202020303030
Out put like :6
C :: Delete A File When Function Is Called And Starts Its Loop
Apr 24, 2013I have a function and i want to delete a file when the function is called and starts it's loop i have used this code but unfortunately the file is not deleted ?
Code:
void evaluate(void) /*evaluate the population */{
int mem;
int i;
double x[NVARS+1];
char buffer[101] = {"save.txt"};
[Code] .....
C :: List - Why Delete Function Doesn't Delete
Dec 9, 2014I have to manage a Clinic. I need to delete a booking (for example, if John said he's coming on March 22nd at 15:30 but then he say he's not going to come, I have to delete that booking so another person can use it).
idSearched: the id of the person that is not going to come. I have a lot of specialties and each one has a list. So I ask for the speciality to delete the node (the node contains John's booking). If I don't find it, I return (-1). searchSpecByID return a pointer to the list where the speciality is. So head will point to the first node of the list. In nodeToDelete I have the node I want to delete.
The program detects OK when is the first in the list and when not, but it doesn't delete the node.
Code:
typedef struct bookingList{
tSpecialty specialty;
struct nodo* intro;
} tList;
[Code].....
C++ :: Delete A Node (With No Children) In Binary
Dec 23, 2013I am trying to delete a node(has no children). for some reason, it keeps giving me an error.
void AVLtree<T>::remove(const T& item) {
node* curr = root;
node* prev = nullptr;
node* next = nullptr;
if(curr == nullptr)
[Code] .....
the error is: Access violation reading location 0xfeeefeee.
C++ :: Create Null Pointer After Using Delete
Aug 7, 2014In jumping into C++ it says something like this: It's not necessary but when you delete a pointer it's a good idea to reset it as a null pointer. That if your code try's to dereference the pointer after being freed, your program will crash. This happens to a lot of experienced programmers.
This could corrupt users data. delete p_int;
p_int = NULL;
1. If you can deference a pointer after the memory is freed, why can't you just delete the pointer?
2. If you can do 1, how do you delete the pointer using code?
3. Every thing I've read says that free memory is handed out in a sequenced order. I don't believe that is true at all. I may be wrong. Why can't you put the data in any number of places if it will fit. Isn't the compiler smart enough to know where bytes (bits)and pieces are stored?
4. If you storing anything in free memory must use a pointer to it?
5. Can a pointer or something similar be used with stack memory?
C++ :: Binary Search Tree - Delete Node
Apr 3, 2013This is the delete function of binary search tree. However it won't enter the if-else statement that checks whether the node to be deleted is the left child or right child.
void DeleteNode(node* T, int number) {
node* x = new node;
node* current = new node;
node* dele = new node;
node* finder = new node;
finder = root;
[Code] ....
C++ :: Binary Search Tree Delete Node
Sep 5, 2014Below is my implementation of a Binary Search Tree, but there is a bug in the DeleteNode() function. It does not set the parent's pointer to NULL as I intended.
View 1 Replies View RelatedC++ :: Reading From TXT File That Is A Record
Apr 18, 2014I'm working on a program using class booktype... to hold information about various books that I have saved on a txt file. Each object of the class book type holds the author, publisher, ISBN, number of copies in stock.
I am still very much new at c++ and not exactly sure how to get in info from the file I've made earlier..
Code:
#include<iostream>
#include<iomanip>
#include<string>
#include<cstring>
#include<fstream>
using namespace std;
class bookType {
Also the text file is formatted where after I've entered the author's name I then hit return, then publisher then I hit return, ISBN then return, and so forth does that effect the program? As for my txt file this is what I have
Code:
Moby Dick
Sebastian Armesto
Oberoson Books Ltd
0001
201
The Scarlet Letter
[Code] ....
C++ :: Dynamic Memory - Create Multiple Instances Without Explicitly Call Delete
Mar 28, 2014look at this code:
#include <iostream>
using namespace std;
class teste
[Code]....
Each time i call "x = new teste();" the previous object is deleted? Does this code cause any sort of memory leak?
C/C++ :: Reading In Record In Text File Twice?
Dec 1, 2014I am working on my final project for my intro to c++. Its a simple program where you buy a car, choose parts for it, see the price of it in total, buying option, and to view past records.
So my problem lies with displaying the records. For some reason(doesn't many how many records there are) the very last record displays again without the "Model" part, but displays the rest of them fine. In other words, there are 2 problems, the last record is displayed twice, 2nd that added record displayed is missing the "model"(this problem doesn't matter really if you can solve the first problem, but would still like to know why it does that).
I tried debugging it and I believe the problem lies with the --------while(fName.good()). It just decides to repeat it again even though in the text file, it does not have that extra record.
//inventory
void viewInvent(string fName)
{
//variables
[Code]....
C/C++ :: File Search Not Starting At First Record
Aug 10, 2014Below is a snippet of my code in which it loops through a file trying to find the matching record of a selection given by the user. I use tellg() to tell me where the search begins and it does in fact start at the beginning. But when the search actually executes, it starts at the last record, loops once, and ends, as it does not find the matching record (when the user enters '24' for example)
void Hardware::updateExistingRecord(ofstream &addRecordInfo, ifstream &updateRecord, Hardware &_records) {
//selection on which field to update
enum Field { RECORD_NUMBER = 1, TOOL_NAME, QUANTITY, COST, EXIT };
cout << "Enter record number you would like to update
";
cout << "Enter zero to exit
?";
[Code] ....
C :: Updating Record In Random Access File
Nov 5, 2014I have been searching through the forums and found a couple snippets of code and from that i came up with this. What i want to do is search for the specific movie code and then update the movie status from inactive to active (for argument sake).
Code:
#include <stdio.h>
#include <stdlib.h>
typedef struct SYSTEM_MOVIE{
int movie_code;
int movie_dur;
char movie_title[25];
[Code] ....
C :: Student Record System / File Handling
Feb 25, 2013Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
#include <windows.h>
}
[code]....
I dont know how to modify the previous record that i have done in the Add Student function. i searched from different sites and got this code for modifying a record in a text file. But, i cant figure it out why its not working.
C/C++ :: Record Every Transaction That Made To A File Like A Receipt
Jun 19, 2014I dont know anything about filestreams. I want to record the files that the customer bought, total, cash and change.
Here's my code.
// Create a program that will initiate a purchasing system for registered agents in an agency.
#include<iostream>
#include<windows.h>
#include<conio.h>
#include<fstream>
#include<string>
using namespace std;
void password();
[code]....
C :: Binary File Write By User Input Then Printing Binary File Data Out
Dec 6, 2013Following 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] .....
C++ :: How To Create A Function That Takes A File Object As A Reference Parameter
Feb 21, 2013I have a school project in which need to create a function that takes a File Object as a Reference Parameter. Supposedly, it should allow me to read the first piece of data from others separated by a space from a file. The later be able to continue reading from the next piece of data.
I know how to set things up to read from the data file, such as using
Code:
#include <iostream> , and
Code:
ifstream inputFileName;
inputFile.open ("nameOfFile");
I also understand how to pass a variable by reference to a function. But I simply cannot put the two items together!
I tried using
Code:
void getFileInput (ifstream &); //parameter
getFileInput ("nameOfFile") // call
void getFileInput (ifstream &dataFileName)
In the function I used
Code:
ifstream inputFile;
inputFile.open (dataFileName);
I'm just not getting an understanding of this concept!
C++ :: Create Binary Search Tree Template To Be Used To Create AVL Tree
Feb 10, 2013For my data-structures class, I am attempting to create a binary search tree template to be used to create an AVL tree. I've written a Generic_Tree template for the BST to inherit from, and before I jump into implementing the AVL tree I'm testing the BST member functions. Everything was compiling fine until I added the BST insert() function. Now, I'm getting the following error message from my linker:
undefined reference to 'BST<void>::insert(int, void*)'
Stemming from the call in main line 16.
my makefile compiles with:
g++ -Wall -g Generic_Tree.cpp BST.cpp barfing.cpp main.cpp
Generic_Tree:
template < typename NODE_DATA, unsigned MAX_KIDS >
class Tree {
protected:
struct NODE {
NODE_DATA* contents;
Tree* child[MAX_KIDS];
Tree* parent;
[Code] ....
I'm use to c and havn't used classes or templates before (except for declaring instances of them). The whole syntax is mystifying to me,.