C :: Passing Struct Through Array

Apr 2, 2013

I am trying to pass a struct through an array to another array from one microprocessor to another microprocessor and then dereference that array to update the same exact struct on the other microprocessor.My goal is to always have values inside of both structs while sending any updates to the struct on the other microprocessor in the mean time but I seem to be looping through the data and the members of the struct seem to be cleared out after every clock cycle. I can verify this by the flashing of my leds which the struct controls.

FIRST MICROPROCESSOR

Code:

extern struct i2c_data * TX_Data;
extern struct i2c_data TX_Data_1;
extern struct i2c_data TX_Data_2;
}

[code]....

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C++ :: Passing Struct Array In Function

May 5, 2013

Here's my code : [URL] .....

You should be able to enter those fields, and after some time when while loop is stopped (when u press n) it should print out that PhoneBook bellow. I don't understand what is the problem but I think it is that Display function.

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C :: Passing Array Of Struct To Sorting Function

Mar 6, 2015

how is this done not really sure .

Code:
//prototype
void improvedbubblesort (struct team Table[]);
//this is defined out side of main

[Code]....

the whole code is very long but can post if necessary . Basically i get no errors in this but its not sorting them . Think its in the way i pass the array of struct .

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C :: Passing Struct Members To Execlp

Oct 2, 2014

I am trying to pass multiple args to g_signal_connect through a struct and it's members. I think the problem lies with execlp. I am trying to pass the struct members to it but I keep getting errors. No matter how I format execlp and the struct args, I always get an error. The current error I receive is Bad address. Like I have said before, no matter how I format execlp, I receive some sort of error.

Code: /*
Compile me with:
gcc -Wall sshfs-gtk -o sshfs-gtk `pkg-config --cflags --libs gtk+-2.0`
*/
#include <gtk/gtk.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <wchar.h>

static void destroy( GtkWidget *widget, gpointer data ) {

[Code] .....

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C :: Using Typedef Struct And Passing Pointers To Functions

Mar 3, 2013

I am having problems with passing my values through functions.

Here is my code:

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
void test(int**);
void test2(int**);

[Code]....

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C++ :: Passing Struct Arrays To A Function By Value Not By Reference?

Mar 16, 2013

I am working on incorporating a function in to an already existing piece of code, I have incorporated the function fine as far as I am aware.

The problem I have is that I am trying to pass two int arrays to the function, so that i can manipulate and compare them "the values will be changed the originals cannot be changed"

I am having trouble pulling the information out of the already created array, I am able to pass the pointer reference for the single value which is not exactly what i want "best_prog".

My function is below I have commented the memcpy parts and also the majority of the code isn't there cause it is not needed to see make the copy work.

int edit_distance(int index) {
struct prog *progp = &population[best_prog];
/* The struct of best prog not sure if i need one for the other prog I am trying to compare it with the one below doesn't work as intended.*/
//struct prog *progp = &population[];
int editdistance = 0, ar1 = 0, ar2 = 0, a = 0, b = 0, j = 0, x = 0;

[code].....

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C# :: Reference Type When Passing Struct To Parameter?

Jan 24, 2015

Does putting a ref when passing a struct to a parameter work? Say i have this code

struct struct1 {
public int i;
public void show() {
Console.WriteLine(i);

[Code] ....

The output doesn't change. The result is

0
100
500
0

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C :: Parsing Char Array To Array Of Struct To Process Packets

May 28, 2013

I wrote this simplified version of a program i am writing that parses data in UDP packets. In the process of doing so i pretty much answered all my questions and fix all the problems i was having.

decodeSystemMap function will be in loop, and will proccess packets that have mostly the same data, only a few items will be added or changed or deleted.

whats the best way to check if there are any new, deleted, or removed items in the packet and only modify those?
Is there anything unsafe / dangrous about the way the code is now?

Code:
/* * File: main.c
* Author: david
*
* Created on May 23, 2013, 11:57 AM
*/

#include <stdio.h>
#include <stdlib.h>

[Code] ....

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C :: Print Values Of Array From Function By Passing Array?

Nov 1, 2014

I wanted to print the values of a array from a function by passing the array as well as the number of elements to be read. For a single dimensional array, this is how i have written it. It's pretty straight forward. I want to read 5 elements from the 5th element in the array.

Code:
#include<stdio.h>
void display(int array[],int size) {
int i;

[Code]....

With this code I want to print the five elements from the element present in [0][4].

But shows an error that

Code:
D:BennetCodeblocks CLearning CSingleDimentionalArray.c||In function 'main':|
D:BennetCodeblocks CLearning CSingleDimentionalArray.c|18|warning: passing argument 1 of 'display' from incompatible pointer type [enabled by default]|
D:BennetCodeblocks CLearning CSingleDimentionalArray.c|2|note: expected 'int (*)[10]' but argument is of type 'int *'|
||=== Build finished: 0 error(s), 1 warning(s) (0 minute(s), 0 second(s)) ===|

I know when you pass a array as an argument it gets decomposed into a pointer, but with a multi-dimensional array this is not the case. how this works for mult- dimensional array's?

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C++ :: Passing 2D Array To A Function Where Size Of Array Is Not Known At Runtime

Jun 27, 2014

I'm wondering if it is possible to pass a 2d array to a function where the size of the array is not known at runtime.

I've tried

function ( array[][6] ) ;

But the size of the array has to be constant so it cannot be declared later.

I've tried using a template but you still have to declare the size of the array at runtime. Is this even possible at all?

The only other way I can think of is using a dynamic 2d array but how to create one and manipulate it.

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C :: Array Of Pointers To A Struct?

May 10, 2013

I am working on an assignment identical to another post from a couple years ago, for reference here is the thread:

array of pointers to structures sorting addresses by zip code

They way it is written on that thread is almost identical to the way the teacher implied to have it done (only wrote part of the input block). But I am having an error:

When it gets to the output section it outputs then next name along with the zip code... I tried strncpy and strxfrm but both cause more problems than they did work.

The last part of the project is to have the output put out in order of least zip code to most zip code (00000<99999), so this is causing me a real problem and I do not see what exactly is making this happen.

Here is my code (we dont HAVE to use gets but professor suggested using it for this assignment, next lab is to rewrite this using files and fgets rather than I/O redirection):

header.h Code: #ifndef lab_6b_7b_Header_h
#define lab_6b_7b_Header_h
//header file intiating other headers
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct{

[code]....

I have not started the sorting code because I cannot get past this, but once I have proper zip codes I am sure I can make a sort function no problem.

I am using xcode with some breaks to read variables as various points and do not notice anything wrong until it makes it to the output functions, although this page briefly pops up between input and output functions when the breaks are up:

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C++ :: Array Of Struct Initialization

Apr 4, 2014

In a book I'm reading, the author has the following struct:

struct VertexPos {
XMFLOAT3 pos;
};

Where XMFLOAT3 is a structure with x,y,z floating point values within. He declares and initializes an array as the following.

VertexPos vertices[] =
{
XMFLOAT3(0.5f, 0.5f, 0.5f),
XMFLOAT3(3.3f, 5.6f, 3.6f),
XMFLOAT3(-4.5f, 2.2f, 6.4f)
};

It doesn't make sense to me why this is working. The way my mind is thinking about this is that vertices is an array of type VertexPos, so then why can it be initialized with objects of type XMFLOAT3?

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C++ ::  Length Of Array Of Struct

Jan 23, 2015

I'm trying to make an application and I need the length of the array of a struct. Like this:

struct myStruct {
int integer;
};
myStruct struct[] =
{
1,
2,
};

I want to get how many ints are in the array...

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C++ :: Reading A File Into Array Of Struct

Nov 20, 2014

Code:
#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
struct inventory

[Code]...

This is my program output Enter the file name : "filename".txt ..... (Nothing shows up)

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C :: Bsearch In Array Of Pointers To Struct

Mar 6, 2015

What I'm trying to do with this code is an address book and I have an array of pointers which are returned by malloc whenever I need to add an extra entry in the address book. What I need to do is search for a specific entry using bsearch. I've got an inqSort() function that sorts the table and runs normally, but my program crashes when I try to use bsearch.

Code:
typedef struct {
char name[20];
char phone[14];
} abEntry;

[Code] ....

Every time an entry is inserted, I inqsort() the array so it's always sorted, and it works as expected. But when I try to call findEntryUI(); from the main() function, the program crashes after entering the name I want to search.

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C :: Allocating Memory To Array Of Struct?

Sep 9, 2013

Do you have to allocate memory(malloc) for an array of structs? Example:

Code:
typedef struct{
char * name;
}First;
struct name{
First fname;
};
struct name Names[10];

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C :: Searching Array Of Struct Students

Feb 28, 2013

I have to search an array of struct students on the basis of their first names, last names and roll numbers .. so far i am done with the input of the student first , last names and roll numbers . I have problem in searching the array ..

Code:
#include <iostream> Code: #include <string>
using namespace std;
struct Student {
string FirstName ;
string LastName ;

[Code] ....

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C++ :: Using Struct / Char Array For Tic Tac Toe Game

Feb 11, 2014

I basically just want a function that tells me if 'X' or 'O' won in a tic-tac-toe game. I don't care about the visuals, I just want a function that tells me if 'X' or 'O' won. If X wins, return 0. If Y wins, return 1.

How to do the diagonals, but as far as the across and down wins, I know I have to use a nested for loop, but am a little stuck, as to exactly how to set it up.

#include <iostream>
using namespace std;
struct TTT{
char array[3][3];
unsigned moves;

[Code] ....

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C++ ::  Static Member In Struct Array?

Jun 25, 2013

Here's the definition of my struct:

struct Speaker {
static int numElem;
string name;
int number; // Phone
string topic;
float fee;
};

// IN main() FUNCTION
Speaker s[10];

The goal is for numElem to keep track of how many of the 10 elements are in use. However, I'm not sure the proper way to access the element, if it's even possible.

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C++ :: Reading A File Into Array Of Struct

Nov 21, 2014

#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
struct inventory {
int barcode;
char description[512];

[Code] ....

This is my text file
20123451
Sugar packet (1 kg)
2.50
560
21347652
Milo 3-in-1
12.50
200
20123453
Salt (1kg)
4.50
270
21347654
Nescafe 3-in-1
12.50
400
20123455
Tamatoes
4.00
100
21347656
Cucumbers
4.00
280

This is my program output
Enter the file name : "filename".txt
..... (Nothing shows up)

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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++ :: Allocation / Deallocation Of Array Within Struct

Feb 27, 2013

Okay so I have a question. Lets say I want to create arrays of exact size for abstract data type members. For example:

struct student {
char name[10];
int idNumber;
};

My question is how to declare this array as null so that later i can give it an exact size to match the length of the name. if it were not a part of the struct i would imagine that the code would look something like this:

char * name = NULL;
name = new char[10];

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C/C++ :: Accessing Elements Of Struct Array

Dec 9, 2014

I've been working for some number of days on this code to take information about movies from both a file and the user, store the infos in an array of structs, and at the end, write all the info out to a file. I'm having some problems with an error message reading:

"prog.c:102:11: error: subscripted value is neither array nor pointer nor vector"

this error occurs in many lines (which I will label specifically below -- they are everywhere where I am trying to access/modify an individual element of a struct element of the array).

A few examples of where I am having the problems are lines:
39, 52-55, 70, 72, and 86 (and more of the same exact variety).

I am obviously rather systematically doing something wrong, but I am quite certain all of these are the exact same mistakes.

I pull up also 2 or 3 other errors, but I don't think they are related and should be able to fix them quickly once I work out this conundrum.

#include <string.h>
#include<stdlib.h>
#include <stdio.h>
int moviecount =0;
typedef struct{
int year;

[Code] .....

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C/C++ :: Sizeof (struct) Returns 6 More Bytes Than Actual Struct Size?

Sep 14, 2014

#include <stdio.h>
#define MAX_USERS 20
struct {
char ID[10];
char Name[40];
int Pos;

[Code] .....

I was attempting something weired with address to move data around when I discovered that the size of the array is not what I expected. I am passing this structure as &Users to a function that declares it as a void *, then I can deal with chunks of data (memmove) and not have to worry about index or things like that. However...sizeof is returning something I do not understand.

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C++ :: Passing Value Into Array

Apr 16, 2014

I am writing a program for a poker game.. I created a class to get cards and create deck.. the problem I am having now is how to deal 5 cards to an array to be evaluated later. I want to call the array player1[5]. So I tried to create a pointer called GetCard, and was hoping to then pass the value into the player1[] array. I tried to use pointer but I get the following error

4931[Error] void value not ignored as it ought to be

Code: #include <stdlib.h>
#include <iostream>
#include <ctime>
#include <algorithm>
using namespace std;

[Code] .....

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C++ :: Defining Struct In Code Using Array Class

Mar 16, 2013

Is it any different when using a class in my code. My previous code i define my struct like this

Code: #include <iostream>
#include <fstream>
#include <string>

struct{

[Code] .....

or do i still define it the same way at the top of my code.

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