The C International Standard defines a C language stream file as a
sequence of data that is read and written one character at a time. All
I/O operations in ISO C are stream operations.
On the iSeries Data Management system:
The ILE C/C++ run-time library allows your program to process stream files as text stream files or as binary stream files. Text stream files process one character at a time. Binary stream files process either one character at a time or one record at a time.
Because the iSeries Data Management system carries out I/O operations one record at a time, the ILE C/C++ library simulates stream file processing with OS/400 records. Although the ILE C/C++ library logically handles I/O one character at a time, the actual I/O that is performed by the operating system is done one record at a time.
Because the iSeries Data Management system carries out I/O operations one record at a time, using system commands such as OPNQRYF together with stream I/O operations on the same file may cause positioning problems in the file your program is processing.
Caution:
The format of fopen() is:
#include <stdio.h>
FILE *fopen(const char *filename, const char *mode);
The mode variable is a character string that consists of an open mode which may be followed by keyword parameters. The open mode and keyword parameters must be separated by a comma or one or more blank characters.
Create an input, output, or input/output file stream and then link to a
file. Use the open() member function of the file stream class to link a
file stream with a file. The format of the open() member function
is:
void ifstream::open(const char *filename, openmode mode=ios::in); void ofstream::open(const char *filename, openmode mode=ios::out|ios:trunc); void fstream::open(const char *filename, openmode mode);
(C) Copyright IBM Corporation 1992, 2005. All Rights Reserved.