This is a very simple question, but it is just hard for me to figure out. I try to move a file from my folder to a program files subfolder, but I think the cmd in windows take the space between program and files as a delimiter. Anyone?
system("xcopy password.ini C:\Program Files\OpenSLP /i /y");
Sometimes, it returns a message, "Invalid number of parameters". Sometimes, it is "parse error". Please help!
Sharon
Because \ is a magic character, and you need to be careful how you use it.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Do you have any good suggestion of using \?
1. Not to use it; try forward slash instead "/"Originally Posted by sharonch
2. Double it; as in "\\" for each time you want a single "\"
Tim S.
"...a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match.." Bill Bryson
Hmmm, I tried, it didn't work. I still think the problem is in the "space" instead of "\".
system("xcopy password.ini C:\Program Files\OpenSLP /i /y");
Because it treats the C:\Program Files as C:\Program. It doesn't know what to do with the rest "Files\OpenSLP /i /y" It is also too many parameter for xcopy.
Any path (in windows) that includes a space needs to be wrapped in double quotes. And double quotes, in C string literals, need to be4 escaped with backslashes. This is in addition to the backslashing concern.
So (with backslashes escaped)
or (with backslashes replaced with forward slashesCode:system("xcopy password.ini \"C:\\Program Files\\OpenSLP\" /i /y");
If you are happy for your code to be windows specific (which it already is, since xcopy is windows specific) better to use WIN32 API function calls rather than a system() call. I'll leave that hint there ...Code:system("xcopy password.ini \"C:/Program Files/OpenSLP\" /i /y");
Yes! It is working. Thanks a lot. I want to check if I am right: the WinAPI that correspond to system() is WinExec(). But it didn't work in my program. I include <Windows.h> and <WinBase.h>, but not helpful. This also warns me that I don't understand windows c programming. I don't know how or where to find the appropriate library to use in my MSVC++2008 to write c program.
I'm not suggesting using WinExec(). I'm suggesting using functions for traversing directories (FindFirst(), FindNext(), etc) and copying of files (CopyFile(), etc).
