while(! end_of_file(my_file) )
{
go_on_and_read_for_everlasting_peace(my_file);
}
feof in standard c++ library
Author
Hello!
I'm switching from the old c library (printf) to the new c++ one (cout) and I need to know if there's a function similar to feof() to be able to do:
if you use file streams, the good() method:
std::ifstream in("in.txt");
while( in.good() )
{
// do stuff
}
there is also a eof() method
std::ifstream in("in.txt");
while( in.good() )
{
// do stuff
}
there is also a eof() method
#include <fstream>#include <string>std::ifstream file( "filename" ); //std::ifstream is-a std::istreamwhile ( file.good() ) //includes "!file.eof()"{ std::string line, word; char character; std::getline( file , line ); file >> word; file >> character;}
Author
ok thanks!
I had had a look at that eof() method but it only accepted a int argument. Anyways I'll use good() now, thanks!
I had had a look at that eof() method but it only accepted a int argument. Anyways I'll use good() now, thanks!
If you are using the iostream libraries, and not the stdio.h (and you realy should in C++)
you can use the ifstream::eof() function.
ifstream fin;
...
while(!fin.eof())
{
...
}
or
while(fin.good())
{
...
}
Im not sure if they do the exact same thing though...
EDIT:
Whow, I must be typing slow...
you can use the ifstream::eof() function.
ifstream fin;
...
while(!fin.eof())
{
...
}
or
while(fin.good())
{
...
}
Im not sure if they do the exact same thing though...
EDIT:
Whow, I must be typing slow...
Quote:Original post by Trillian
I had had a look at that eof() method but it only accepted a int argument.
Look at better docs then:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcstdlib/html/vclrfbasicioseof.asp
file.good() doesn't just refer to end of file. file.eof() does.
file.good() can become false on EOF, on a failed input operation (e.g. you try to read a number and there are only letters there) or if the stream itself goes "bad".
file.good() == !( file.eof() | file.fail() | file.bad() );
file.good() can become false on EOF, on a failed input operation (e.g. you try to read a number and there are only letters there) or if the stream itself goes "bad".
file.good() == !( file.eof() | file.fail() | file.bad() );
Quote:Original post by pulpfist
Im not sure if they (!eof and good) do the exact same thing though...
They don't.
file.good() is synonymous with !( file.eof() || file.bad() || file.fail() )
EDIT: Beaten by Fruny D:
This topic is closed to new replies.
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