Defining standard input, output, and error streams for BPXBATCH
z/OS XL C/C++ programs require
that the standard streams, stdin, stdout,
and stderr, be defined as either a file or a terminal. Many C functions
use stdin, stdout, and stderr. For example:
- getchar() obtains a character from stdin.
- printf() writes output to stdout.
- perror() writes output to stderr.