Flexible input schemes for digital programs are described. No card format or special order of cards is required. Read package is controlled by small set of parameters which can be changed to account for differences in computers and digital programs

Diekelman, D. P.

English

NASA Technical Reports Server

December 1972	 B72-10750 
NASA TECH BRIEF 
•	 Manned Spacecraft Center 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage 
commercial application. Tech Briefs are available on a subscription basis from the National Technical Information 
Service, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.C. 20546. 
FORTRAN Read Package 
The problem: 
The lack of a flexible input scheme in many large 
digital programs becomes a problem to both program 
users and programmers. Many input schemes require 
card formats, a fixed card order, or a specific number 
of cards. These requirements make program usage 
cumbersome and error prone. 
The solution: 
A read package has been developed which offers the 
following advantages. No card format or special order 
of cards are required. The package is controlled by a 
small set of parameters which can be changed to account 
for differences in computers and digital programs. 
How it's done: 
The parameter location in COMMON is used to 
identify the parameter. This location number is placed 
anywhere in the first five columns on the data card. The 
value of the parameter is placed anywhere on the rest 
of the card and followed by an asterisk. Sequential 
locations may be defined on the same card. The read
package determines what type of parameter is being 
defined and automatically differentiates among integer, 
real, octal, or Hollerith inputs. 
Notes: 
1. This program is written in FORTRAN IV for use on 
the CDC-6400 computer. However, with the proper 
job control language, the program can be run on any 
computer which uses a FORTRAN IV or higher 
compiler 
2. Inquiries concerning this program should be directed 
to:
COSMIC 
112 Barrow Hall 
University of Georgia 
Athens, Georgia 30601 
Reference: MSC-14161 
Source: Dennis P. Diekelman of

McDonnell Douglas Corp.

under contract to

Manned Spacecraft Center

(MSC-14161) 
0 Category 09 
This document was prepared under the sponsorship of the National
	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States
	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States
	 will be free from privately owned rights.
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FORTRAN read package

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