C / C++ / MFC

Re: Questions about EM_SETWORDBREAKPROC message and EDITWORDBREAKPROCA function

12-Mar-22 22:14

I am not aware of any way you could do this, since there are no words that need breaking until they are displayed. You may need to consider other options, both of which require you to do all the display handling yourself:
1. Make your display a fixed width based on the font you are using and the amount of data you wish to display.
2. Rebuild the entire display whenever the Window is resized.

It may be possible to implement the above by subclassing the RichEdit control, although I have never done that in MFC.

ForNow13-Mar-22 5:01

13-Mar-22 5:01

Richard

My display is fixed width as it is Courier new I know that exact number of characters in the width of a line (wonder if ShowWindow(SW_HIDE) would drive edit editwordbreakproc)

I am just wondering if there is another way and causes line breaks other than 0x0a, 0x0d, 0x0c

I have to think about this

C++ programming

ali khan Mar20226-Mar-22 8:08

ali khan Mar2022

6-Mar-22 8:08

Hi friends! I am new to c++ and just went through the concept of Namespace.What I have understood about namespace till now is that "it is a region where identifiers can be declared in form of group".
But then I went through the following code somewhere on internet
Namespace identi
{
int a;
Class S
{
public:
int z;
float x;
}
}
So I am bit confused after seeing the definition of class S inside namespace.isn't it only a declarative region where we can only declare identifiers together in a group or can we define identifiers as well inside it? Just like we did with class S.Kindly someone please answer, would be so nice of you.

Re: C++ programming

Richard MacCutchan6-Mar-22 21:57

Getting a specific version of rich edit

6-Mar-22 21:57

See Namespaces (C++) | Microsoft Docs[^] for complete details.

Re: C++ programming

Edd.Dan1-May-22 4:47

Edd.Dan

1-May-22 4:47

the main reason of why we use namespace identifier is classify our code in a bigger categories and parts. its useful to manage your libraries by "using namespaces". Imagine you can have many different name spaces in your code and every time you need you can use it. its helps you to choose smaller and more abstract names for your classes and functions.

for example you can have many Mathematic function and classes in a namespace like "Matrix". in that case you can have simple function names like "add" , "div", "mul" instead of "matrix_add" ,"matrix_dev" and ...
to use them in an specific part of your code you can use it in to ways ..
1:

C++

Matrix.add(m1,m2);
Matrix.div(m3,m4);

C++

using Matrix {

   add(m1,m2);
   div(m3.m4);
}

also for defining classes and functions in a namespace you can do it like this ...

C++

namespace Matrix {
   
    void add(matrix a, matrix b){
       ...
       
    }

    void div(matrix a, matrix b){
       ...
       
    }

    void mul(matrix a, matrix b){
       ...
       
    }
    .
    .
    .



}

ForNow6-Mar-22 8:02

Re: Getting a specific version of rich edit

6-Mar-22 8:02

It seem like I remember that rich edit used to line break on CR/LF 0x0d + 0X0D now it seems either 0x0a 0x0c (form feed) of 0x0d (carriage return causes) causes a line break

Is there a way to look for a specific version of rich edit I means the class names for 1.0 thru 3.0 the doc says use RICHEDIT_CLASS which loads Riched20.dll

more so I remember that rich edit would only line break on CR AND LF not sure which version as I would like to use that version

Randor 9-Mar-22 9:25

Randor

9-Mar-22 9:25

Hi,

You can override both the word and line breaking behaviors. Have a look at using the EM_SETWORDBREAKPROC message[^] to set the EDITWORDBREAKPROCA function[^].

Best Wishes,
-David Delaune

Re: Getting a specific version of rich edit not hitting my WordBreak Function

ForNow9-Mar-22 13:49

Struct with union with different sized members - How can I declare the smallest struct?

9-Mar-22 13:49

Hi
here is my wordbreak function

C++

int  CALLBACK EditWordBreakProc(LPTSTR lpszEditText, int ichCurrent, int    cchEditText, int code)
{
	char FAR* lpCurrentChar;
	int  nIndex;
	int  nLastAction;

	switch (code)
	{

	case WB_ISDELIMITER:

		

		if (lpszEditText[ichCurrent] == 0x0a0d)
			return TRUE;
		else
			return FALSE;

		break;
	}
}

Here is where I invoke it

C++

	fptrx = &EditWordBreakProc;
	storagepointer->SendMessage(EM_SETWORDBREAKPROC, 0,(LPARAM) fptrx);
long numstream = storagepointer->StreamIn(SF_TEXT,STORAGESTREAM);

variable definition

C++

funcptrx fptrx;

C++

int CALLBACK EditWordBreakProc(LPTSTR lpszEditText, int ichCurrent, int    cchEditText, int code);

C++

typedef int (CALLBACK *funcptrx) (LPTSTR, int, int, int);

arnold_w6-Mar-22 1:17

arnold_w

6-Mar-22 1:17

I am writing code in standard C for a microcontroller (STM32L) and I compile with GCC. I have a struct that contains a union and the union can be of different size:

struct MyStruct
{
    int someInteger;
    union
    {
        int smallMember[1];
        int bigMember[1000];
    } smallOrBigMember;
};

Is it possible for me to declare an object of MyStruct that only occipies 8 bytes of memory if I only intend to use the smallMember of that object?

Re: Struct with union with different sized members - How can I declare the smallest struct?

Mircea Neacsu6-Mar-22 2:39

Mircea Neacsu

6-Mar-22 2:39

No, you cannot. If you need a flexible size structure, the idiomatic solution is to add a zero size array at the end of the structure. Then, presumably, one of the fixed length fields tells you the size of the variable part. Something like this:

C++

struct MyStruct
{
  int small_or_big;
  int variable_part[0]; //or int variable_part[] if you want to conform to C90
};

struct MyStruct *ptr;
if (ptr->small_or_big == BIG_STRUCT)
{
  ptr->variable_part[999] = some_value; //we know that variable part size is 1000
  //...
}

When you allocate the structure you have to account for the variable part:

C++

//...
ptr_small = malloc(sizeof(MyStruct) + SIZE_OF_SMALL_PART);
ptr_small->big_or_small = SMALL_STRUCT;

ptr_big = malloc (sizeof(MyStruct) + SIZE_OF_BIG_PART);
ptr_big->big_or_small = BIG_STRUCT;

Mircea

modified 6-Mar-22 11:10am.

Line Break Rich Edit

ForNow5-Mar-22 17:42

5-Mar-22 17:42

I have been using carriage return 0X0AD line feed 0A to break lines on Rich Edit using SF_TEXT until I noticed some of the data I am trying to Dump contains a 0x0d 0X0A causing an inadvertent line break
is there an another way to break lines

Thanks

Re: Line Break Rich Edit

Richard Andrew x646-Mar-22 4:33

Richard Andrew x64

6-Mar-22 4:33

I think what you need to do is find another way to represent the 0xAD data so that it doesn't trigger a line break. Like use a special character to represent it in the data stream that you're loading into the control.

The difficult we do right away...
...the impossible takes slightly longer.

Re: Line Break Rich Edit

ForNow6-Mar-22 5:19

6-Mar-22 5:19

I thought rich edit uses BOTH CR / LF as new line seems different versions Of Richedit now to 4.1 have different methods of line breaking trying to figure which rich edit dll/class version I am running

C++ even numbers query

Member 1555051328-Feb-22 16:30

Member 15550513

28-Feb-22 16:30

Write a C++ program that reads a positive integer n, and prints the first
n even numbers.

For example, one execution would look like this:
Please enter a positive integer: 3
2
4
6

File Name

evennumbers.cpp

Score

There are three tests each worth 2 points

1.#include<iostream>
2.using namespace std;
3.
4.int main()
5. {
6. int n;
7. cout<<"Please enter a positive integer:";
8. cin>>n;
9.
10. cout<<"These are all even numbers in between 1 to "<

Victor Nijegorodov28-Feb-22 20:31

Victor Nijegorodov

28-Feb-22 20:31

Well, looks like good and not complicated exercise. Did you solve it?

Member 1555051328-Feb-22 21:33

Member 15550513

28-Feb-22 21:33

Hi it's okay when I run it,but the Autograrder says FAILED.What could be the problem? Should I submit the executable file only.If I rename the executable file as .cpp the Autograder results to errors of 2 .cpp files.What should I do please?

Victor Nijegorodov28-Feb-22 23:02

Victor Nijegorodov

28-Feb-22 23:02

Sorry, I could not understand what you mean... Sigh | :sigh:

The code you've posted is not complete, it doesn't compile and it does nothing. Thumbs Down | :thumbsdown:

Member 155505131-Mar-22 17:31

Member 15550513

1-Mar-22 17:31

Victor Nijegorodov1-Mar-22 22:32

Victor Nijegorodov

1-Mar-22 22:32

Please, stop reposting the same! Mad | :mad:

I've already read it (your post from 1-Mar-22 9:33) And answered!

Richard MacCutchan1-Mar-22 22:40

1-Mar-22 22:40

How do you expect anyone here to answer? We have no idea what the Autograrder is, or what criteria it uses to judge your code. And unless you show the complete code we cannot suggest any changes.

David Crow1-Mar-22 3:50

David Crow

1-Mar-22 3:50

So what's the problem, exactly?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

Richard Andrew x642-Mar-22 9:42

Richard Andrew x64

2-Mar-22 9:42

Is there any doubt? He wants someone to do his work. Laugh | :laugh:

The difficult we do right away...
...the impossible takes slightly longer.

Christine Belisario25-Feb-22 20:48

Christine Belisario

25-Feb-22 20:48

#include<stdio.h>

int getFactorial(int);

int main(void) {
    int n;
    printf("Enter n: ");
    scanf("%d",&n);

    printf("Factorial of %d is %d", n, getFactorial(n));

    return 0;
}

int getFactorial(int n) {
    // how to Implement this recursive function 
}

Re: C

Richard MacCutchan25-Feb-22 22:52