ofstream problem
 

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.

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

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.