Re: Getting started, need some guidance - C / C++ / MFC Discussion Boards

Garth J Lancaster5-May-13 19:48

5-May-13 19:48

ugh - well, on Windows you need to use something like inpout32.dll - do a google for it

this article may help, although its targetting vb.net and the parallel port, it describes inpout32.dll at least

I/O Ports Programming (Parallel port) Reading / Writing + Surveillance System using VB.NET[^]

hope that helps

Re: C++ communicate with hardware

machisiou5-May-13 20:12

machisiou

5-May-13 20:12

Thanks a lot. Wink | ;)

How to check the disk space if enough

haha_c5-May-13 17:22

haha_c

5-May-13 17:22

Hi,use MFC,I want to konw if the disk space is enough to write a file,How can get the informaion

Re: How to check the disk space if enough

Jochen Arndt5-May-13 21:20

Jochen Arndt

5-May-13 21:20

Use GetDiskFreeSpace()[^] or GetDiskFreeSpaceEx()[^].

Getting started, need some guidance

Mikens5-May-13 16:37

Mikens

5-May-13 16:37

Hello all, I'm trying to get back into programming. Studied C years ago. I've Perl in work for the last 10 years or so, but want to turn to C/C++/C#? Would like to do some Windows development and possibly some Android or iOS development in the future.

I have my old C book from school by Kernighan and Ritchie.
I've installed the Eclipse with CDT and MinGW. Hadn't gotten anything to compile yet, I think it's just a path issue with gcc.

Just wanted some feedback here. Am I on the right track? Is Eclipse ok, thought about using MS Visual Studio Express.

TIA

Re: Getting started, need some guidance

Amarnath S5-May-13 21:30

Amarnath S

5-May-13 21:30

Rather than a book, I've found this online free video course to be very useful - Stanford Programming Abstractions[^]. That requires Visual Studio (or Xcode on Mac).

Re: Getting started, need some guidance

Mikens6-May-13 2:05

Mikens

6-May-13 2:05

Thanks I'll check that out.

Re: Getting started, need some guidance

Richard MacCutchan5-May-13 22:11

Richard MacCutchan

5-May-13 22:11

If you want to work with Windows programming then I would recommend you get hold of Visual Studio 2010 Express[^], free from Microsoft, as it contains a couple of skeleton templates for Windows applications. There are also lots of free samples in the CodeProject atrticles sections[^].

You may also like to consider whether moving on to C# would be a better choice. In which case Charles Petzold has this great e-book (also free)[^] to get you started.

Use the best guess

Re: Getting started, need some guidance

Mikens6-May-13 2:11

Mikens

6-May-13 2:11

I appreciate the feedback. I think I will look harder at C#. I've already downloaded Visual Studio Express 2012. Would that version be ok, or are you suggesting 2010 for a particular reason?

Re: Getting started, need some guidance

Richard MacCutchan6-May-13 4:56

Richard MacCutchan

6-May-13 4:56

I have seen quite a lot of negative comments about the 2012 versions on CodeProject, but that is largely from people moving up from the 2008 or 2010 versions. If you are starting from scratch you will probably be more than happy with it; maybe you can give some feedback sometime.

Use the best guess

HOW to insert String in C++

OmarSH5-May-13 5:21

OmarSH

5-May-13 5:21

just i am asking what how to let user enter his name ,
i want to make program that ask you enter your name, your family name,?
specify by writing the code please .
Thank you

Re: HOW to insert String in C++

Yashwanth. C.b5-May-13 5:52

Yashwanth. C.b

5-May-13 5:52

my frnd you should first include string.h and declarethe variable for example

#include"iostream.h" #include"string.h" main(){ string name; cout<<"enter your name"; cin>>name; cout<<"your name is "<<name;  }

modified 5-May-13 12:02pm.

Re: HOW to insert String in C++

Richard MacCutchan5-May-13 6:47

Richard MacCutchan

5-May-13 6:47

You should use <pre> tags round code (using the code link above) and line it up properly like:

C++

include"iostream.h"
#include"string.h"

main()
{
    string name;
    cout << "enter your name";
    cin >> name;
    cout << "your name is "<<name;
}

The var link is used to highlight single words or phrases such as int variable; in a sentence.

Use the best guess

Re: HOW to insert String in C++

Richard MacCutchan5-May-13 6:50

Richard MacCutchan

5-May-13 6:50

It depends on your program type. If it's a console app then see the answer provide by Yashwanth. If it's a Windows app then the normal way would be to use a dialog box. There are many samples to be found which explain how to do it.

Use the best guess

how to develop my own language

Yashwanth. C.b5-May-13 2:46

Yashwanth. C.b

5-May-13 2:46

hi frnds i am newbie to c++.i like to develop my own language in c++ but i dont know where to start with. So plz help me my frnds . I am just 15 years old. I already know c c++ and java

Re: how to develop my own language

Richard MacCutchan5-May-13 3:12

Richard MacCutchan

5-May-13 3:12

Take a look at some of these links[^].

Use the best guess

Re: how to develop my own language

Yashwanth. C.b5-May-13 5:03

Yashwanth. C.b

5-May-13 5:03

thank u for ur help. The alef ++ language greatly helped me. Now i can continue my work with an idea. I AM unable to express my thanks in words.

Re: how to develop my own language

Richard MacCutchan5-May-13 5:14

Richard MacCutchan

5-May-13 5:14

Yashwanth. C.b wrote:
I AM unable to express my thanks in words.

You could start by not using bold font for your messages.

Use the best guess

Re: how to develop my own language

H.Brydon5-May-13 16:57

H.Brydon

5-May-13 16:57

You might find the following links useful:

- YACC info[^]
- YACC Tutorial[^]
- YACC helpers[^]

--
Harvey

Question about the return value of windows procedure [solved]

econy3-May-13 7:43

econy

3-May-13 7:43

The windows procecure like LRESULT CALLBACK MainWndProc(), windows get the return value.

I wonder what are the meanings of the return value, for example,
return 0, return 2, etc.

I saw many example codes using return 0.

modified 6-May-13 11:57am.

Re: Question about the return value of windows procedure

C^hris L^osinger3-May-13 8:00

C^hris L^osinger

3-May-13 8:00

The return value is the result of the message processing and depends on the message sent.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms633573%28v=vs.85%29.aspx[^]

image processing toolkits | batch image processing

Pointer to object doesn't point to any thing !!!!!!

OmarSH3-May-13 0:02

OmarSH

3-May-13 0:02

hello every body :
i just want to under

C++

stand what the pointer in linked list point to ,it is a object pointer but it seems to me that it doesn't point to any thing

C++

class LList
{
private:		
	struct ListNode	// Declare a structure for the list {	float var1;
int var2;	
 ListNode *next;};
 ListNode *head;			// List head pointer
public:
LList( void ) { head = NULL; } 		// Constructor
~LList( void );				// Destructor
void appendNode( float , int );
void insertNode( float , int );
void deleteNode( float , int );void displayList( void );
};

Re: Pointer to object doesn't point to any thing !!!!!!

Jonathan Davies3-May-13 0:26

Jonathan Davies

3-May-13 0:26

Within your

C++

struct ListNode

I would expect a

C++

ListNode* pNext

and another

C++

ListNode* pPrev

which must be set by one of the methods called on an instance of your

C++

LList

to point to the next and previous structures in the list.

They don't point to anything to start with, it's only when you add one to a list that they are used - they are the links in the linked list.

Re: Pointer to object doesn't point to any thing !!!!!!

Richard MacCutchan3-May-13 0:57

Richard MacCutchan

3-May-13 0:57

This is a class definition, so it merely describes the parts of the class. You need to write the implementation of each function which will manage the pointers.

Use the best guess

Re: Pointer to object doesn't point to any thing !!!!!!

CPallini3-May-13 10:33

CPallini

3-May-13 10:33

Like any other uninitialized variable, an uninitialized pointer contains garbage (or, in other words, points to garbage).
In the shown code, head is initialized with NULL to mark the list as empty, it is responsibility of appendNode (or insertNode) implementation to allocate a fresh ListNode and make head pointing to it.

Veni, vidi, vici.

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