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LETTERifstreamULETTER A class for file input operations.

Overview
#include <iostream.h>

class ifstream : public istream {
public:
ifstream();
ifstream(const char *, int = ios::in);
virtual ~ifstream();
void open(const char *, int = ios::in);
void close();
filebuf *rdbuf();
};

Portability
AT&T Release 2 streams library

Description
The "ifstream" class provides an input stream for files. It uses the filebuf class as streambuf.

Constructors
ifstream::ifstream();
Initializes an object without opening a file.

ifstream::ifstream(const char *, int); Initializes an object and opens the specified file.

Deconstructors
ifstream::~ifstream();
Closes the file if it is open.

Methods
void open(const char *, int);
Opens the file with the specified name and mode.

void close();
Closes the file.

filebuf *rdbuf();
Returns a pointer to the file puffer used.

See also
istream , fstream , ofstream , filebuf