A Fortran language anticipation and prompting system

ABSTRACT

An experimental interactive system has been developed on an intelligent terminal which accepts only syntactically correct Fortran statements and otherwise assists the user in preparing Fortran programs. Whenever possible the system anticipates the syntax of statements which is implied by an initial input and supplies the general form of the statement directly beneath the line on which input is being accepted. In some cases (the function heading) decisions are inverted from the language and in others (statement numbers) inputs are automatically positioned. In general, only syntax within the statements is checked, but some global checking (multiple main programs) is performed. Alternate forms of statements are often displayed with the unwanted ones being eliminated as entries are made. The techniques used demonstrate pedagogic as well as productive potential.

REFERENCES

• 1: ANSI Subcommittee X3J3. "American Standard FORTRAN," X3.9-1966, American National Standards Institute, 1430 Broadway, New York, N.Y. 10018, 1966.
• 2: Clarification of Fortran standards—initial progress, Communications of the ACM, v.12 n.5, p.289-294, May 1969 [doi>10.1145/362946.363005]
• 3: C. Kerpelman, Clarification of Fortran standards—second report, Communications of the ACM, v.14 n.10, p.628-642, Oct. 1971 [doi>10.1145/362759.362774]
• 4: Bitzer, Donald L. "Some Aspects of design and economics for a computer-based educational system", J. of Ed. Data Processing, Vol. 6, No. 1 (January 1969), pp. 9-27
• 5: Scott H. Cameron , Duncan Ewing , Michael Liveright, DIALOG: a conversational programming system with a graphical orientation, Communications of the ACM, v.10 n.6, p.349-357, June 1967 [doi>10.1145/363332.363343]
• 6: Edsger W. Dijkstra, The humble programmer, Communications of the ACM, v.15 n.10, p.859-866, Oct. 1972 [doi>10.1145/355604.361591]
• 7: APL/360 Primer, GH20-689-2, IBM Corporation, Technical Publications Department, 1133 Westchester Avenue, White Plains, New York 10604, 241 pp.
• 8: McIlroy, M. D. "ANSI FORTRAN Charts", Unpublished paper, Bell Telephone Laboratories, Murray Hill, N. J.
• 9: Digital Equipment Corporation. DECsystem-10 Timesharing Documentation, DEC, Maynard, Massachusetts 01754.
• 10: Roberts, Roger, "HELP—A question answering system," Proc. AFIPS Fall Joint Computer Conference, Vol. 37, AFIP Press, Montvale, N. J., 1970, pp. 547-554.
• 11: Earl J. Schweppe, Dynamic instructional models of computer organizations and programming languages, ACM SIGCSE Bulletin, v.5 n.1, p.26-31, February 1973
• 12: Datapoint 2200 Reference Manual, Datapoint Corporation, 9725 Datapoint Drive, San Antonio, Texas 78284, 1972.

INDEX TERMS

Primary Classification:
  D. Software
  D.3 PROGRAMMING LANGUAGES
      D.3.2 Language Classifications

          Nouns: FORTRAN

Additional Classification:
  H. Information Systems
  H.1 MODELS AND PRINCIPLES
      H.1.2 User/Machine Systems
  H.3 INFORMATION STORAGE AND RETRIEVAL
      H.3.4 Systems and Software
          Subjects: Performance evaluation (efficiency and effectiveness)

  K. Computing Milieux
  K.3 COMPUTERS AND EDUCATION
      K.3.2 Computer and Information Science Education
          Subjects: Computer science education

General Terms:
Human Factors, Languages, Performance

Keywords:
Computer science education, Computer-based education, Fortran programming, Interactive systems, Programmer training, Programming languages, Prompting systems, Syntactic analysis