Thread: Copying a file from a variable?

Hey everyone.. its been so long since i've posted here..

So my question is: Is there a way to copy a file from one location to another using variables?

I'd really appreciate the help- Oh, and i'm using Dev-C++ 4 as a compiler.

Thanks in advance!

I may have explained that wrong.

Say i've got one variable containing the path of a file to be copied and another variable with the path of where it's supposed to be copied to.

Now all I need is to figure out how to copy it.

Okay, I tried that.. but im totally confused on the sprintf() function. It's been so damn long since i've done anything in C++.

Here's what I tried:

Code:

char pathtocopyfrom[256];
char pathtocopyto[256];
char doit[256];
sprintf(doit, "copy ", pathtocopyfrom, pathtocopyto);
printf(doit);

All that sprintf is storing to my variable is the string "copy". Im totally lost.

Can you hook me up with an example?

Originally Posted by cpjust

Code:

const char source[] = "C:/SomeFile.txt";
const char dest[] = "D:/NewFile.txt";
char buffer[256];

sprintf( buffer, "copy %s %s", source, dest );
system( buffer );

Are we working on Linux now all of a sudden or some Windows 8?
Last time I checked, Windows used \ and not /!

Originally Posted by tabstop

Code:

sprintf(doit, "copy %s %s", pathtocopyfrom, pathtocopyto);

FYI: A google on "C++ sprintf" only returned 1,060,000 hits. And technically, this is really C; I imagine the C++ people would actually use a stringstream or similar.

That's not C, that's shell script.

The C++ way to do this is this:

Code:

outputFile << inputFile.rdbuf();

Where input file and output file are c++ file streams, that have been constructed or opened with the proper file names.

You are lucky that CreateFile actually supports / instead of \, because that's why it works. However, this doesn't:

C:\>copy C:/test.txt C:/test2.txt
Bad arguments.

Oops. Guess we need to use \ after all!

Use the CopyFile API, or better yet, use boost::filesystem::copy.