ifstream / ofstream question (using libstdc++ v3)

[phoenix]

How can i read a numbers from file.. I created this file like this:

int dane, i;
std:fstream plik_z;
plik_z.open(nazwa, std::ios:ut | std::ios::trunc | std::ios::binary);
for (i = 0; i < 15; i++) plik_z << dane;
plik_z.close();


Is it any way to read from this file all numbers ?.. If so - how can i do
it.
If it's impossible - how should i create this file to be able to read a
numbers from this file?
I couldn't find any formatted input / output functions in ifstream /
ofstream.

phoenix.

 

[Victor Bazarov]

How can i read a numbers from file.. I created this file like this:

int dane, i;
std:fstream plik_z;
plik_z.open(nazwa, std::ios:ut | std::ios::trunc | std::ios::binary);
for (i = 0; i < 15; i++) plik_z << dane;

You probably need to put some kind of separator between the numbers
you output. Use a space, for example:

... plik_z << dane << ' ';

plik_z.close();


Is it any way to read from this file all numbers ?..

Yes. Open another stream of type 'std::ifstream'. Then use operator >>
to read the numbers. It will automatically skip the spaces.

If so - how can i do
it.
If it's impossible - how should i create this file to be able to read a
numbers from this file?

See above.

I couldn't find any formatted input / output functions in ifstream /
ofstream.

Functions called 'operator<<' and 'operator>>' are for output and input.

What C++ book are you reading that doesn't explain that?

Victor