C++ :: How To READ Pointer Of A Struct Type In File

Nov 23, 2013

This is a c++ Code. I want to read a address to a pointer. When I try to do so it generates an error. I did is >> obj1[0].contentAdress; in main.

struct node3{
node3(){
nextContent = NULL;
for (int i = 0; i<1020; i++)
content[i] = '';

[code]...

no operator found which takes a right-hand operand of type 'node3 *' (or there is no acceptable conversion)

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C :: Function To Read A Text File - Incompatible Pointer Type

Nov 3, 2014

So for a project, my professor sent out two pages of code containing functions to read a text file (since we do not know how to write this on our own yet). I've got the code working on Orwell IDE and it gives me 2 warnings saying

"Passing argument 1 of 'readFromFile' from incompatible pointer type"

"Passing argument 2 of 'option2Print' makes integer from pointer without a cast"

The Orwell IDE seems to just bypass these warnings and compiles the code correctly. However, when I transferred my files over to my desktop using BloodShed (what the professor uses), instead of getting a warning I get an error and the code won't compile.

I assume it will not compile on his computer either since he uses the BloodShed IDE.

I don't know how to put the code directly into the text neatly, so a attached a .zip file with my code. The "storms.txt" file is also included. (the file that will be read).

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C++ :: Accessing Inside Structure Via Struct Pointer To Struct Pointer

Jun 5, 2012

"
#include <stdio.h>
struct datastructure {
char character;
};
void function(struct datastructure** ptr);

[Code] ....

These codes give these errors:

error: request for member 'character' in '* ptr', which is of non-class type 'datastructure*'
error: request for member 'character' in '* ptr', which is of non-class type 'datastructure*'

These errors are related to
"
*ptr->character='a';
printf("Ptr: %c",*ptr->character);
"

I want to access "character" data inside the structure "trial" by a pointer to pointer "ptr" inside function "function",but I couldn't find a way to do this.

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C++ :: Struct Matrix - Read From TXT File

Jun 18, 2013

I am having a structure called matrix as shown below to represent a matrix your read from a text file.

struct matrix
{
double mat[30][30]; //content of the matrix mat
int row; //number of row in the matrix mat
int col; ////number of col in the matrix mat
};

Declare 3 variables of structure matrix, m1, m2 and m3 in main to be used as describe below.

Task:

1.Write a function void readFile(char *filename, matrix *m) that will read a matrix from a text file and copy to the structure matrix m.

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C++ :: How To Read Struct From Binary File

Oct 12, 2014

I have this file want to read it source code [URL] ....

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C++ :: How To Save Struct To File And Then Read It Back From The File

Aug 5, 2013

How 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 ();
}

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C :: Error While Using Struct In Code To Read From File

Jan 31, 2014

I am trying to use struct to store variables from a text file and use them in the main program. I have first tried running the program without using struct and declaring the variables within the main program and it runs fine. But after using struct, it gives no compilation error and a segmentation fault as output. Also, if the size of file/variable size is unknown can I declare variables as char string[]??

The code is as below:

Code:

#include<stdio.h>
struct test {
char string1[10000];

[Code].....

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C/C++ :: Read A Type Specifier From A File

Oct 28, 2014

I need to create certain objects which are listed in a file. So my code needs to run a loop and create objects(of type specified in file) and put them in a list.

It appears to me that type specifiers can't be replaced by string. Is there a way out ? I want following code to be working somehow.

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

[Code].....

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C++ :: Iterator To A Vector Of Struct Type?

Nov 18, 2013

I'm working on a program where I have a vector full of <myClassType> structs.

I'm trying to insert items into a vector, searching first through the vector to make sure the value isn't already in the vector before inserting it. The "find" function isn't working properly.

I keep getting C2678 "binary '==': no operator found which takes a left-hand operand of type "myClassType" or there is no conversion errors in Visual Studio 2010.

I know it's something having to do with the find function and my iterators, but I can't, for the life of me, figure out what it is.

I've tried switching to const_iterators, but I get the same error message.

void foo::insert(const myClassType& en) {
vector<myClassType>::iterator it;
vector<myClassType>::iterator it1;
it = find(Table.begin(), Table.end(), en.memberOne);

[Code] .....

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C++ :: Unable To Convert Parameter To Struct Type

Nov 3, 2013

I am trying to make a automated menu. It shows there are no syntax errors but when compiled it says cannot convert choice from type into to menuItemType. I am not sure what I did wrong. Here is the code

Code: #include <iostream>
#include <string>
#include <fstream>
using namespace std;
struct menuItemType
{
string menuItem;

[Code]...

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C# :: Why Can't A Constant Field Be Of Non-built-in Struct Type

Dec 9, 2011

Code:

class T
{
enum E { }
struct S { }
interface I { }
delegate void D();
class C { }
}

[code]....

All of the above are possible except the constant field of a type that is a struct. I can see why the non-string reference types would default to the only literal expression they can represent - null - and if I'm not mistaken the default value of a struct is an instance of the struct with all its fields set to their default value, but why is it that a const struct field is not possible? is there a reason why or is it just the way c# was written? oh and by the way, what's the idea of allowing enum types to have a default constructor?

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C++ :: Forward Declaration Incomplete Type Struct?

Feb 13, 2015

I am trying to compile the files below. The PosLin.cpp contains the SurTriAuto and SurTriPosRotAndQ functions below. Before adding SurTriPosRotAndQ, it compiled fine, but when I added SurTriPosRotAndQ, I am getting "invalid use of incomplete type ‘struct PosRotAndQ" error messages

I was thinking I could try moving SurTriAuto and SurTriPosRotAndQ to PosLin.h, but since they return "T*", I'm not sure what to do

I have a "t.h" file

namespace TNS
{
class T
{

[Code]....

when I add "include Pos/PL.h" to geopar.h, I get an error saying v.hpp is missing, where v.hpp is part of a 3rd-party software and it is already in my directory

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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++ :: Accessing Private Members Of Same Struct Type

Mar 26, 2013

I've been reading the tutorials on Friendship and Inheritance [URL] ..... but I still don't understand why I can't access members of the same struct type.

bool wordBeginsAt (int pos) {
if (pos == 0)
return true;

///use the 'message' string
Message go;
return isAlphanumeric(go.messageText[pos]) && (!isAlphanumeric(go.messageText[pos-1]));
}

The code above is located in a source file, where the function isAlphanumeric passes a char value, and Message is the struct containing the string I want to access. Below is the declaration of the struct and string located in the corresponding header file.

struct Message{
.
.
.
private:
std::string messageText;
};

My frustration comes when I try to call and assign messageText like the tutorial does to its private members, but I keep getting an error saying I can't access the string because it is a private member. Is there a way to access the string without having to pass it through the function wordBeginsAt?

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C :: How To Use Pointer To Struct

Mar 6, 2015

how can I call and print the Pointer:

ptr->address
Code: #include<stdio.h>
struct account {
int address;
int value;

[code]....

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C++ :: Create A Class Type Structure Using Struct Instead Of Classes

Apr 16, 2013

I am trying to create a class type structure using struct instead of classes.

Code:
#include <iostream>
#include <stdlib.h>
using namespace std;
struct myclass {
int * array;
int nelements;

[Code] ....

Guess what I am asking is using the pointer in the first code section better or is there another way'. I don't know about making the second code work.

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C/C++ :: Source Code Containing Struct Pointer

Mar 9, 2015

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
struct stock{
char symbol[5];
int quantity;
float price;

[Code] ....

- In the final output
Value
%.2f

- How is the final pointer reference at line33 leading to the output %.2f ? (i do understand that the %% is used to display a %] ....

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C/C++ :: Printf Several Values Of Struct Pointer?

Jan 14, 2015

I am currently trying to printf several values of a struct pointer but with little success.

#include"Header.h"
/*
In header:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
struct FileStruct {
char FileQuestion[64];
[Code] ....

As you can see I am trying to re-crate the output from the first loop in my second loop, however it is with little success. The second loop's first run re-crates the last output of the first loop and if I use FileStructPointer++ or -- the output goes broke.

See attached for how it looks in the console window.

Attached image(s)

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C :: Function Pointer Inside A Typedef Struct

Aug 25, 2014

I want to have a function pointer inside a typedef struct but I get a segmentation fault when I run my code. Here's my code:

#include <stdio.h>
typedef struct Foo {
void (*bar)(int);
} Foo;

void func(int x) {
printf("display: %d

[Code] ....

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C++ :: Initialize Char Pointer Array In Struct

Nov 28, 2014

I am trying to store data in a struct to be able to read it latter . have problems initializing this.

struct FoodAndDrink {
struct Food {
char* CannedGoods[2] = {
"Canned Spaghetti",
"Canned Tuna",

[code] .....

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Visual C++ :: Operator Overload Not Defined Error When Type Accessed Through Const Struct

Oct 17, 2012

I have a basic vector/point class where I've overloaded a bunch of arithmetical operators:

Code:
#pragma once
class point {
public:
point() {
}
point(float p_x, float p_y, float p_z) : x(p_x), y(p_y), z(p_z)

[Code] ...

I can use it fine like

Code:
point p(50,50,50);
point q(50,50,50);
point t = p * q + q;

However when I put this point type into a struct and try to access the members after passing it through by const reference:

Code:
struct sextic {
point a,b,c,d,e,f,g;
};
inline static sextic sexticDifference(const sextic &p_sextic1, c

[Code] ....

This gives me an "operator not defined" error for compilation.

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C++ :: Return Struct Pointer From A Void Function And Print

Mar 17, 2013

i need to return a struct pointer dynamically allocated inside a function call void function() which is done using 'out parameters' in following code

struct my_struct {
int x;
} void my_function( my_struct** result ) {
my_struct* x = new my_struct{ 10 };
//...
*result = x;
}

Now i have a doubt, so if i want to print the return value from struct pointer, should i need to print it in the void function() or in the caller the function...

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C :: Shared Memory / Cannot Read Last Element In A Struct

Jun 27, 2014

I have trouble reading the last element in a struct.I do get the correct value for the first two elements. In my example that is:

a = 11 and c = H
however I get:
b = 0
but I am expecting b=2

I got two files to handle this.The first one is writing data to memory -

Code:

#include <sys/shm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
}

[code]....

why I cannot get correct value for the third element in my struct?In the second file where I'm reading from memory I allocate some space. Is this incorrect in some way? I'm running this on a Linux machine.

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C++ :: Multi Data Types In A Line And Read To Struct?

Aug 14, 2014

How can I read this file in to my struct?

12345Joe Lim KH879.00
12233Kay Suet Yee35.98
23781Leong Jing Yang 10.00
67543Woon Tian Yi500.50
struct master {
unsigned short int IDnum;

[code]....

not working

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C/C++ :: Error - Cannot Convert To A Pointer Type

Apr 3, 2015

I have attached the source code I am writing. I have been getting the two following errors. I know it's something to do with the pointer casting.

udp-server.c:174:3: error: subscripted value is neither array nor pointer nor vector
udp-server.c:165:3: error: cannot convert to a pointer type

The file is attached here.
udp-server-edit.txt (7.64K)
Number of downloads: 19

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C/C++ :: Dereferencing Pointer To Incomplete Type

Feb 27, 2014

keep getting "deferencing pointer to incomplete type" on the bold lines:

main:
int main(int argc, char *argv[]) {
printf("Please think of an animal. I will try to find out what it is by asking you some yes/no questions.");
struct treenode *root = mkTreeNode("Is it a reptile?
", NULL, NULL);
struct treenode *selectedNode = root;
root->left = mkTreeNode("Does it have legs?

[code]....

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