Computer program modifies other source language programs as aid to debugging, checkout and final documentation to eliminate manual performance of rearranging and incrementing statement numbers, identifying and sequencing cards and inserting and/or removing end-of-batch symbols

Madden, M. F.

English

NASA Technical Reports Server

November 1971	 Brief 71-10448 
NASA TECH BRIEF 
Manned Spacecraft Center	
_4V 
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. f. 20546. 
FORTRAN IV Digital Program Changer 
The problem: 
To devise a non-manual method for rearranging 
and incrementing statement numbers, identifying 
and sequencing cards, and inserting and/or remov-
ing end-of-batch symbols. Such operations are often 
necessary for debugging or checking out a program 
or for preparing a prograni for documentation. 
Manual performance of the tasks results in compila-
tion eriors, loss of turn-around time, and loss of 
computation time. 
The solution: 
A computer program which modifies other 
FORTRAN IV source language programs, as an aid 
in their debugging, checkout and final documenta-
lion. The program performs three modifications: 
(I) rearrangement and incrementation of statement 
numbers; (2) insertion of card identification and 
sequence: and (3) insertion and/or removal of end-
of-batch symbols. 
How it's done: 
The program rearranges and reincrements the 
FORTRAN statement numbers as well as the cor-
responding statement number references which 
occur in CALL, IF, DO, GO, TO, READ, WRITE, 
ASSIGN, and PUNCH statements in the FOR-
TRAN text. 
All programs are given numerical sequence num-
bers in card columns 77 to 80 and alphanumeric
identification (at the option of the user) iii columns 
73 to 76. 
End-of-batch symbols are commonly used to 
speed up the input in FORTRAN programs which 
are run on teleprocessing equipment. Considerable 
machine time can be saved by usin end-of-batch 
symbols instead of reading all 80 card columns. This 
program places an end-of-batch symbol after the 
last non-blank symbol in columns 1-72 of each card. 
Notes: 
1. This program is written in FORTRAN IV (25%) 
and ASSEMBLER (75%) languages for use on 
the IBM-360 computer. 
2. Requests for further information may be directed 
to:
COSMIC 
112 Barrow Hall 
University of Georgia 
Athens, Georgia 30601 
Reference: B71-10448 
Patent status: 
No patent action is contemplated by NASA. 
Source: M.F. Madden of

North American Rockwell Corp.

under contract to

Manned Spacecraft Center

(MSC-l7567) 
Category 09 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned.rights.
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