ofstream problem

cgifalcon · 10-19-2003, 09:37 AM

I wrote this code on Linux RedHat9

...
#include <fstream>
...
ifstream file(myfile);

//and all was OK, I was able to read it
//bur when I wrote

...
ofstream file(myfile, ios::app);
if (!file)
cout << "File" << myfile << "could no be opened" << endl;
return 1;
else
...

//the program ended with the message above.

The name of the myfile was the same and the location too.

Could somebody help.

Thank zou very much.

verbal · 10-19-2003, 11:15 AM

do you have permissions to write to the file?

your first example

std::ifstream infile( some_file )

is essentially the same as:

std::ifstream infile( some_file, std::ios::in ); // read only

but your second:

// append or random access
std::ofstream outfile( some_file, std::ios::app )

Verbal

cgifalcon · 10-19-2003, 12:00 PM

Thank you very much. I set permission to other and all is OK. I thought that when I logged in as a root and had permission to the file for writting, it was enough.