C / C++ / MFC

Re: C Programming code to build an echo varient that hopefully can be used in WinXP

13-Jan-21 5:24

Hi Richard Thumbs Up | :thumbsup:

Thanks for sharing your experience & advice it has ironed out quite a few wrinkles- I will Kinda work last to the first of your quotes or in reverse order.

Quote:
If you do it properly in the first place you will find there is no need for them. Whilst they will always compile they really are best avoided, especially as a new boy.

I see, what about if I used a "if" "else" statement like e.g. if the user types or stipulates the "-x" flag with "ECO" then "ECO" removes the CRLF/EOL, "else" the user fails to input "-x" flag then "ECO" just echo's one line of text to the screen in the same fashion the normal echo statement does? If this is a suitable alternative I will work on amending the code?

Quote:
I would recommend Visual Studio 2019 from Microsoft. It's free and runs natively, so does not require mingw.

I have downloaded the community edition of Visual Studio 2019 it seems to be the free version, will I need additional software to convert code (ECO.h) to EXE/COM once I have corrected all my errors? and last but not least... (Edit) Oop's It does not seem I will be able to use the 2019 version as it is asking for Dot net vers 4.6 which is a bridge too far for winXPSP3 I think Vers 4.0 was the last for XP I will look for earlier vers compatable with XP.

Quote:
Amazon has it The C Programming Language (2nd Edition): Amazon.co.uk: Kernighan, Brian, Ritchie, Dennis: 8601410794231: Books[^].

It's okay I have managed to get hold of a copy "The C Programming Language" & will inwardly digest & will be good for referencing study.

Best Regards
David

Richard MacCutchan13-Jan-21 1:50

Richard MacCutchan

13-Jan-21 1:50

jackngill wrote:
I see, what about if I used a "if" "else" statement

Exactly right, and you can eliminate any requirement for goto by correct use of if/else, while, switch, etc. My point was (sort of) do it the right way now, and life becomes much easier. Writing code that you know is poor or less efficient with a mental note to fix it in the future is usually a path to problems in the future.

jackngill wrote:
will I need additional software

No, Visual Studio includes all the components necessary to build source code into executables. BTW .COM files were abandoned years ago. Just make sure you include the right components (Visual C++ package) for building C/C++ programs. The same integrated compiler will build code written in either language.

Re: C Programming code to build an echo varient that hopefully can be used in WinXP

jackngill13-Jan-21 5:26

Re: C Programming code to build an echo varient that hopefully can be used in WinXP

13-Jan-21 5:26

It seems that one of my previous replies/posts is under review for possible spam or at least at my end it is showing so. I do not understand why this is I have been reflecting over the content trying to think what may have triggered this, I'm not sure what would cause this reaction. Perhaps I need to contact a mod for clarification.

I think, I will need to check at further length Visual Studio 2017 works with XP but it depends on what vers of Dotnet is required I think Dot net framework Vers 4.0 was the last for XP

modified 13-Jan-21 11:43am.

Richard MacCutchan13-Jan-21 5:36

Richard MacCutchan

13-Jan-21 5:36

Nothing showing here. When and if it does happen, just be patient. The automatic spam checker holds "suspect" messages in a queue. They are then reviewed by one of the many moderators here, and accepted or rejected as appropriate. Your messages may get picked up for spurious reasons, but it is a fairly intelligent system and will improve once it recognises you.

Re: C Programming code to build an echo varient that hopefully can be used in WinXP

jackngill14-Jan-21 12:04

Re: C Programming code to build an echo varient that hopefully can be used in WinXP

14-Jan-21 12:04

Richard,
Yes decided to leave the site alone for a while to allow the spam-bot thing do it's thing. I took the oppertunity to look into/do some research into Visual Studio & which version would be suitable with windows XP.

This info may help others who might find themselves here. The version you can install is dictated in the main by the Dot Net Framework version as Visual Studio requires the relevant dot net framework installed which in the case of Windows XP (last DotNet for XP) "DotNet framework version 4.0" it needs to be installed with your OS. Now I have trawled a few sites looking at what the latest version would be for Windows XPSP3 & it is "Visual Studio 2010" which is going back some when the current vers at the time of writing is 2019. I have found it quite difficult to grab a 2010 version as we are talking old School but I elected to download an offline iso version called OFFLINESOFTWARES.COM_VS2010Express.iso. Not content with just downloading it (which incidently is 693Mb) I have scanned the iso with 2 virus checkers to check for malware & viruses, I do not have any affiliation with the VStudio website it was just the first one which I was successful in downloading it from. I would post the link but I will need to check if it is permissable here first. I think fully installed needs 2.2Gb of your HDD space.

Anyway My little rant over where/which Visual Studio 2010 which may or may not help others now is concluded. I think I will need to clear some HDD space to install it as it needs a fair amount of space. Okay "if" "Else" it is then re not using goto statements Thumbs Up | :thumbsup:

I have been undertaking some house keeping as I needed to clear some hard drive space to install Visual Studio Vers 2010. I have done so but it seems to be defaulting to C++ rather than "C" Will the editor accept "C" code rather than C++?
best Regards

jackngill15-Jan-21 23:59

MFC: Most recently used (MRU) files

15-Jan-21 23:59

Hi Richard Thumbs Up | :thumbsup:

I think because I am working on a EOL OS (XP) I have been having lots of problems installing Visual Studio 2010 I think the problems exist because the OS & the development of VStudio 2010 have not made any progress since its conception & I think that is why it is not working.
I have alternatively installed Code::Blocks with some minor glitchs & needing some additional files to run under XP but it seems to be working correctly.
I went for the portable install so that if it is no good for some reason I can easily ditch. Code::Blocks seems to have continuing development for XP so it has the advantage of update progression.
I will keep you posted re developments

Best Regards Big Grin | :-D

Member 1325158810-Jan-21 18:18

Member 13251588

10-Jan-21 18:18

Microsoft Visual C++ 2019. Windows 10, using MFC
Is there a nice step by step example of code showing how to use the MRU in a standard SDI application with ribbon and without document/view architecture?
My used files (*.jpg, *.bmp) are well stored in the MRU file list of the main menu of the ribbon.
But when I click on one of them I have an error in .../MFC/appui.cpp showing that ENSURE_VALID(m_pDocManager) failed, which is normal because I did not choose doc/view support.

Is there any way out, unless completely rewriting a new project with pDocManager?

Pierre

Re: MFC: Most recently used (MRU) files

Victor Nijegorodov10-Jan-21 21:28

Victor Nijegorodov

10-Jan-21 21:28

You should handle the commands opening the files from MRU list in your own CWinApp derived class. Here you could then open the files without using pDocManager.
See the example in Q243751: HOWTO: Add Command Handlers for MRU Menu Items in MFC App | KnowledgeBase Archive

Re: MFC: Most recently used (MRU) files

Member 1325158810-Jan-21 22:11

Member 13251588

10-Jan-21 22:11

Works fine.
Thanks

Piere

Re: MFC: Most recently used (MRU) files

Victor Nijegorodov10-Jan-21 23:09

Victor Nijegorodov

10-Jan-21 23:09

You are welcome! Smile | :)

Reading the Whole Array of Data from JSON

Litu Sahoo10-Jan-21 4:55

10-Jan-21 4:55

Hi
I want the array of data under items, using this code i am able to get only the value under the first structure of data under items. How can i loop to the second structure of data under items, and further more if present. I am doing this using boost in c++.

Can someone help on this.

items=root.get_child("Serial");
for (boost::property_tree::ptree::iterator itprop = items.begin(); itprop != items.end(); ++itprop)
{
for(boost::property_tree::ptree::iterator it1=itprop->second.begin();it1!=itprop->second.end();++it1)
{
if(it1->first=="Items")
{
boost::property_tree::ptree& rootschild=it1->second;
cout<<"Size is "<<rootschild.size()<<"\n";
for(boost::property_tree::ptree::iterator="" it2="rootschild.begin();it2!=rootschild.end();++it2)
" {
="" it3="it2-">second.begin();it3!=it2->second. end();++it3)
{
std::cout<<it3->first<<": "<<it3->second.get_value<string>()<<"\n";
}
}
}

{
"Header": {
"Name": "abcd",
"Email": "xyz"
},
"Serial": [{
"flavour": "Green",
"Color": "9",
"code": "103",

"Items": [{
"date": "2020/11",
"value": "3.5",
"serial": "01"
}, {
"date": "2020/10",
"value": "3.4",
"serial": "03"
}]
}]
}

With Regards

David Crow10-Jan-21 5:32

David Crow

10-Jan-21 5:32

What about something like:

serial_items = root.get_child("Serial");
items = serial_items.get_child("Items");
for (boost::property_tree::ptree::iterator itprop = items.begin(); itprop != items.end(); ++itprop)
...

I don't use boost, nor have I tried to compile it, so this may or may not work.

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modified 10-Jan-21 15:04pm.

Litu Sahoo10-Jan-21 6:21

10-Jan-21 6:21

Hi,

Thank you for the reply, but the code is crashing in the below line.

David Crow wrote:
items = serial_items.get_child("Items");

With Regards

David Crow10-Jan-21 9:05

David Crow

10-Jan-21 9:05

Litu Sahoo wrote:
...but the code is crashing in the below line.

What exactly does that mean?

Victor Nijegorodov10-Jan-21 9:57

Victor Nijegorodov

10-Jan-21 9:57

Litu Sahoo wrote:
Thank you for the reply, but the code is crashing in the below line.

David Crow wrote:
items = serial_items.get_child("Items");

Did you debug your code? What is the value of

serial_items

before the "crash"?

Litu Sahoo10-Jan-21 21:28

10-Jan-21 21:28

hi
m_data is showing blank and m_children is showing an address.

Litu Sahoo11-Jan-21 3:50