How to use C program to open a text file using Notepad?

Goh Kak Ng

Can someone help to give some tips? Why I compiled the program without error, yet it cannot open the notepad to see my text file : testedit.txt in the file folder c:\AHome. Thanks. #include #include void main() { system("cd C:\\Windows\\System32\notepad.exe c:\\AHome\testedit.txt "); return 0; }

Mircea Neacsu

Try:

system("C:\\Windows\\System32\\notepad.exe c:\\AHome\\testedit.txt ");

Mircea

David Crow

Goh Kak Ng wrote:

...yet it cannot open the notepad to see my text file :

Aside from a few missing backslashes in the string literal, what's the problem?

"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

Mircea Neacsu

He also seems to have a spurious "cd..." at the start of his string. I'd guess that's what's causing his grief but my crystal ball is foggy :)

Mircea

Goh Kak Ng

Thanks for your reply ... I have try ...

system("C:\\Windows\\System32\notepad.exe c:\\AHome\testedit.text ");

The error massage is : 'C:\Windows\System32' is not recognized as Internal or External Command, Operable Program or Batch file.

Goh Kak Ng

Thanks for your reply ... cd is " change of directory " to C:\Windows\System32 where notepad.exe is located.

Dave Kreskowiak

You missed a backslash just before notepad.exe. You don't even really need the entire path to Notepad. This will work just fine:

system("notepad C:\\\\AHome\\\\testedit.text");

Asking questions is a skill CodeProject Forum Guidelines Google: C# How to debug code Seriously, go read these articles.
Dave Kreskowiak

Mircea Neacsu

Quote:

cd is " change of directory "

I know, and it shouldn't be there.

Mircea

Victor Nijegorodov

Goh Kak Ng wrote:

system("C:\\Windows\\System32\notepad.exe c:\\AHome\testedit.text ");

You missed one backslash in the path. It must be:

system("C:\\Windows\\System32\**\notepad.exe c:\\AHome\\**testedit.text ");

Goh Kak Ng

Yes. You are right! Try this work ...

system("C:\\Windows\\System32\\notepad.exe c:\\AHome\\testedit ");

Note that the test file name must be " testedit " and not " testedit.txt ". Otherwise, this file will not be found. Thanks!

Goh Kak Ng

Yes. you are right. cd should not be there. This is the right one ...

system("C:\\Windows\\System32\\notepad.exe c:\\A Home\\testedit ");

Thanks.

Richard Deeming

Make sure you're not doing that from an elevated process. :) It's not quite DLL hijacking, but if an attacker could write a rogue notepad.exe into the %PATH% somewhere, they could then get your process to launch it with elevated privileges.

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

Dave Kreskowiak

True :laugh:

Asking questions is a skill CodeProject Forum Guidelines Google: C# How to debug code Seriously, go read these articles.
Dave Kreskowiak

Goh Kak Ng

Could you help me to understand what do you mean by " elevated process "?

Richard Deeming

User Account Control (Windows 10) - Microsoft 365 Security | Microsoft Docs[^] How User Account Control works (Windows 10) - Microsoft 365 Security | Microsoft Docs[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer