Unformatted I/O
ostream &write(const char *src, int n)
write outputs the specified number of chars to a stream, from an array in memory:
ostream &write(const char *src, int n);It inserts n characters from the array src into the stream.
istream &read(char *dst, int n)
read inputs the specified number of characters from a stream, into an array in memory:
istream &read(char *dst, int n);int gcount()
gcount returns the number of characters read by the last unformatted input operation (get, getline, and read):
int gcount();Example:
char buffer[80];
cin.read(buffer, sizeof(buffer));
cout << "read " << cin.gcount()
<< " characters" << endl;