C++ Tutorial - File I/O

RE: C++ Tutorial - File I/O

Former Member — Tue, 07 Apr 2015 15:46:37 GMT

Your code that writes a file gives a "segmentation fault" in Raspbian, and also some sort of run time error on Windows 7 in Visual Studio 2013. Would you be able to correct this?

Edit: the solution for Windows 7 in Visual Studio 2013 is found here: http://stackoverflow.com/questions/16883037/remove-secure-warnings-crt-secure-no-warnings-from-projects-by-default-in-vis --apparently your fopen method is considered deprecated.

Debugging your tutorial is really quite a bit of work!

RE: C++ Tutorial - File I/O

oneleggedredcow — Thu, 02 May 2013 18:22:18 GMT

Thanks, excellent comment! fstream is definitely the more "c++" way to go about things, whereas what I described was the more "c" way. Personally, I tend to use fopen/fread/fwrite much more, especially for binary files. The only time I use fstream is for reading/writing text files. (And since I haven't given proper treatment to strings - which is coming next article, I was hesitant to go that route.)

RE: C++ Tutorial - File I/O

shabaz — Wed, 01 May 2013 10:05:14 GMT

Hi Shaun,

It's a very useful post as always, the whole tutorial is a great reference.

Another file handling method (useful on Linux/Windows platforms) is to use the fstream library, although this may not be possible on microcontrollers not running Linux.

#include <fstream>

using std::ofstream;

using std::ifstream;

using std::endl;

int

main(void)

{

char line[1024];

ofstream out;

ifstream in("infile.txt");

out.open("outfile.txt");

while (in.getline(line, 1024))

{

out << line << endl;

}

return 0;

}