C++ :: Debug Error When Deleting Dynamic Array

Feb 18, 2013

I get this error when I'm attempting to delete an array. I'm new to dynamic arrays, and from what I have learned, arrays must be deleted after use. I plan on using this in a function later on, so deleting the array is a must.

Here's the error message: Debug Error!

HEAP CORRUPTION DETECTED: after Normal block (#154) at 0x007E55A0.
CRT detected that the application wrote to memory after the end of heap buffer.

Here's my code:
int main() {
//Declare variables
char persist = ' ';
int* primes = NULL;
int size2 = 0;

//Declare array
primes = new int[size2];

[Code] ....

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C++ :: Deleting Elements In Dynamic Array

Nov 22, 2013

I'm having a bit of trouble trying to delete elements in a dynamic array of objects. I tried to delete elements by shifting that particular element and the ones that follow over one element and then assigning the last one to NULL.

cin >> input;
while (input != -1 || k == 7) {
for(int i = 0; k < numberOfRecords; i++) {
if (input == records[k].id) {

[Code] .....

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C++ :: Error Passing Dynamic Array As Arguments

Dec 9, 2013

I am trying to make quicksort and binary search and I get error when I am passing dynamic array to argument. It also says error during initialization of the dynamic array.

//.h file

#ifndef SortableArray_h
#define SortableArray_h

#include <iostream>
#include <string>

[Code] ....

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C/C++ :: How To Debug Error Saying Illegal Structure Operation

Dec 20, 2013

#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<stdio.h>
class complex {
int real,imag;

[Code] .....

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C++ :: Debug Error When Taking A String And Casting It To Float With File Stream

May 9, 2014

Debug Error

ProjectsFinal ProjectGrItemDebugGrItem.exe

R6010 - abort() has been called

I was going over this with a friend and it seems as though getline() is not reading anything in and thus throwing the abort error. I'm not sure why this is because I've included the textfile, with the correct name of course, in both the regular file location and the debug folder. I ask for user input and the user then inputs the name of the file they want, I do some required things behind the scenes and display the results for them in a cmd window. I've included pastebin files for both my header and cpp files because it is far to large for one post I shall, however, post the full code in the comments.

Quick Code

The problem occurs on line 159. I'm assuming once this line is fixed, line 163 will have the same problem.

// Read regular price
getline(nameFile, input, '$');
vectorList[count].regPrice = stof(input.c_str());// Casts string to a float
// Read sale price
getline(nameFile, input, '#');
vectorList[count].salePrice = stof(input.c_str());

Pastebin Links : [URL] ....

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C/C++ :: Create User Defined Dynamic Array For Player Scores - Missing Pointer Types Error

Jan 18, 2015

I'm completely new to pointers and have a homework assignment due where I'm supposed to create a user defined dynamic array for player scores. The only errors I'm experiencing is a C2109: subscript requires pointer type and only on the lines that use the int *score; variable (57, 62, 64, 69, 71, and 82). I've already tried adding = nullptr to the variable and that didn't work.

#include<iostream>
#include<string>
#include<iomanip>
using namespace std;
void players(string[], int[], int);
void average(int[], int);

[Code] ....

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C++ :: Error In Deleting And Renaming A File In C

Jun 19, 2013

Here is my code i wrote for storing details of my apps.

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
struct app {
int id;
char name[200];

[Code] ....

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C++ :: Fill Value Of Dynamic Array Of Dynamic Arrays?

Jan 4, 2013

I'm writing a program in which I have to use a matrix to represent a file in code. because it's a file, the size of the matrix is undefined, and therefore the matrix has to be dynamic. I found out that my compiler doesn't like dynamic multidimensional arrays, so I was thinking of this matrix as a dynamic (monodimensional) array of other dynamic (monodimensional) arrays. My program (and thus this example) uses unsigned chars.

unsigned char variable=something;
unsigned char**matrix=new unsigned char*[lenghtOfMainArray];
for(int rowNumber=0;rowNumber<lenghtOfArray;rowNumber++)
{

[Code].....

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C++ :: Dynamic Arrays Error?

Mar 4, 2014

i was trying to make a dynamic array in this form :

int x;
cin>>x;
int ar[x];

my g++ (gcc) compiler on linux refused to create an array without a fixed size , however using the same code on windows on dev-cpp it was complied and executed , also it allowd me to create and use the dynamic array , i thought it was a compiler bug , however when i restarted and returned to g++ it compiled and executed the code although it never did before i tried the code on windows , how can that be and is it dangerous ?

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C++ ::  Deleting Two Dimensional Array

Oct 21, 2014

Consider the following code snippet:

GLfloat box[4][4] = {
{ x2, -y2, 0, 0 },
{ x2 + w, -y2, 1, 0 },
{ x2, -y2 - h, 0, 1 },
{ x2 + w, -y2 - h, 1, 1 },
};

Do I need to call a variant of

delete [] box;

Against this float array?

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C++ :: Deleting Element Of Array

May 6, 2014

This is a program to get an 10 characters including a-z, A-Z, and _ .

Then this program will cout the text with out _ !

Example:
cin >> sd_fd_e_dd
cout << sdfdedd
# include <iostream>
#inclued<vector>
using namespace std;
char a[10],m;

[Code] ....

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C# :: Deleting Entries From Array?

Nov 2, 2014

I'm creating a program that holds three arrays one for the persons last name, one for the points scored and one for the player number, now I've got all the arrays and everything done but I'm not sure as to how I'm going to delete an entry for multiple arrays.

static Int32[] ProcessDelete(Int32[] playerNumbers, String[] playerLastName, Int32[] playerPoints, ref Int32 playerCount)
{
Int32[] newArray = new Int32[playerNumbers.Length - 1];

[Code].....

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C++ :: Append Comma To A String - Dynamic Memory Allocation Error

May 16, 2012

Trying to append a comma to a string. Getting "Segmentation Error" on Solaris when the function is entered the second time.

Code:

// Appends a comma to the given string
void appendComma(char* instring) {
if (instring == NULL) {
instring = realloc(NULL, strlen(","));
strcpy(instring,",");

[Code] .....

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C++ :: Deleting A Record From Struct Array?

Aug 31, 2014

I want to delete selected records from struct array using cstring reading from files. Here I read my records to stud struct then assign non-deleted to stu struct but its not deleting as desired...strcmp is giving 25

while(cont=='Y'){
cout<<"Enter student ID to delete: ";
cin.ignore();
cin.getline(id, 15,

[Code] ....

I did some debugging effort and I found here is the problem..the stud[0].ID and id is not same but why? I am giving in same id and both char array lenght is 15

while(cont=='Y'){
cout<<"Enter student ID to delete: ";
cin.ignore();
cin.getline(id, 15);
cout<<strlen(stud[0].ID)<<" "<<strlen(id)<<endl;///---> lenght 1 is 10
///---->lenght 2 is 8
cout<<strncmp(id,stud[0].ID, 10 )<<endl;

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C++ :: Deleting Specific Class Object In Array

Jan 23, 2013

I am trying to delete a speific element in an array of class objects. i am overwriting the element i waant to delete with the element after it. My algorithm works but the output is not correct, after debugging it seems my objects just dont copy, is there a way to copy a class object, i have looked up copy constructors and attempted to write one but it does not seem to have any effect on the output.

below is my code

class user {
string firstname, lastname, currentteam, position, status ;
int age ;
public:
user() {};

[Code] .....

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C :: Array Of Structs (adding / Deleting Elements To A File)

Sep 20, 2013

I want to write a program to record my neighborhoods's name and address by using an array of structs and file.

my array of structs is

Code:
#define SIZE 30
typedef struct{
char name[30];
char address[100];
}Detail;
Detail neighbor[SIZE];

And I want to make adding,deleting, and searching functions.Something like

Code:

void add();//Add name and address to a file,
//and add more to the same file if I want to.
void del();//Delete or Change some neighbor's name or address
//in the same file(Can I?)
void search();//Search name and show detail

So I started to code adding function first, but I don't know that I need to use pointer to code each functions relations, and I don't know how to check that my input's already exists yet. But I started some code below...

Code:
void add() {
int i=0;
FILE *fp = fopen("neighborhood.txt", "at");
if ( fp != NULL ) {
do{

[Code]......

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C++ :: Creating / Filling And Deleting Dynamically Allocated Array Of Objects

Jul 26, 2012

Project compile successfully but console turn off with "Windows " with error doesn't print or get anything

Code:
#ifndef Point_HPP // anti multiply including gates
#define Point_HPP
#include <string>
#include <iostream>
#include <sstream>
#include <cmath>

[Code] .....

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C++ :: Why Can't Static Array Copy Values From Dynamic Array

Mar 13, 2013

But it can the other way around

Code:
static_Array= dynamic_Array;
dynamic_Array = static_Array;

The second statement works and i'm able to print out both arrays with equal values but with the first

[code] static_Array = dynamic_Array;I get incompatible types in assignment of 'int*' to 'int [7]' is the error I get [/code]

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C :: Dynamic 2D Array To Function?

Jul 15, 2013

Code:
Int** d = malloc( ROWS * sizeof(int*));
for (i = 0; i < ROWS; i++)
d[i] = malloc(COLS * sizeof(int));
fx(d);

My question is, in a function declaration, why do I not have to specify the number of columns. How is this different than when I pass a static 2D array to a function, in which I must declare the function parameter with the number of columns.

Code: void fx(int d[][COLS]);
VS.
Code: void fx(int **d);

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C++ :: How To Get Size Of Dynamic Array

Jun 12, 2013

I remember in C++, when a dynamic array is allocated, the size of this array is stored right before the array in memory. Therefore compiler knows exactly how long, when this array is deleted.

Do all compilers store the size this way? Is it a safe method to get the size of a dynamic array?

Here is a example code, it works fine on Visual Studio 2012.

#include <iostream>
using namespace std;
class dummy {
public:
dummy() {
cout<<"dummy created"<<endl;

[Code]...

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C++ :: How To Change Array To Dynamic

Sep 13, 2013

So this is the code I have so far, I didn't know it had to be a dynamic array so how would I Utilize dynamic array allocation to size the modal array

#include <iostream>
using namespace std;
int main() {
const int arraySize = 25;
const int patternSize = 10;

[Code] ....

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C++ :: Dynamic Map Creation Or Array

Mar 4, 2014

I need to create dynamic array or map. for example

CString *a1;
CString *a2;
CString *a3;

it minimized to using for loop.
for (int i=1;i<=3;i++) {
CString s="a"+"itoa(i)"
CString *s;
}

Something like this. its same as map concept.

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C++ ::  Dynamic Allocation 2D Array

Nov 14, 2013

I need to confirm that this problem cannot be solved without a pointer. Namely I need to read the rows and columns number from the user cin >> m, n and then use to declare an array int A[m][n];

However as m and n are not constants I am not able to do that. Is there a workaround? The following is the solution I came with BUT using a pointers which should be not the case.

// solution with using pointers as "int A[m][n]" does not work for me!!!
void TwoDimensionalArrayFunc(){
int m = 0;
int n = 0;

// instruct the users to enter array dimensions
cout << "Please insert value for m:";
cin >> m;

[Code] ....

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C++ :: Using Array With Dynamic Size?

Feb 6, 2013

arrays with dynamic sizes. That being said, I'm working with a simple code which seems to work just fine, my only concern is that once I display the 'char array', not only displays the user's inputs but some extra data, symbols and what not.

why, if to my understanding the first user's input already sets the size of the array

#include <iostream>
#include <iomanip>
using namespace std;

[Code].....

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C++ :: Dynamic Allocation From Array?

Dec 26, 2012

I need to write 2 functions:

1. MyMalloc
2. MyFree
___________________________

I have a 1000 bytes global array (which did not dynamic allocated).

I need to make "dynamic allocation" from this array.

For example - MyMalloc(50) ---> The program will allocate 50 bytes OF THE ARRAY'S SIZE.
------
MyFree(pointer) ---> I need to check if the pointer is in the array and free the space.

It should be managed by blocks. The array should also contain the manage variables (for me).

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C++ :: Deleting Array Of Derived Class Objects Through Base Class Pointer

Mar 21, 2015

In this book, item 3 is about never treat arrays polymorphically. In the latter part of this item, the author talks about the result of deleting an array of derived class objects through a base class pointer is undefined. What does it mean? I have an example here,

Code:
class B
{
public:
B():_y(1){}
virtual ~B() {
cout<<"~B()"<<endl;

[Code] ....

This sample code does exactly what I want. So does the author mean the way I did is undefined?

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