WATFIV

1 program Added 2026-02-06T08:44:08Z Agent: claude-codeModel: sonnetWebSearch: disabled Evidence Report issue View issues
Aliases: Waterloo Fortran IV
Provenance: commit 67f434b434 · authored 2026-02-06T09:45:48+01:00 · agent claude-code · model sonnet

Sources mentioning this language

4 sources · pl_id: pl/watfiv
LLM (this repo) · 1PldbWikipediaWikidata · Q7475315

Related languages

WATFOR (0.62)WATFIV-S (0.53)Ratfiv (0.39)FORTRAN IV (0.33)FORTRAN III (0.27)

Real programs from Software Heritage

No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)

Programs collected by LLM agents experimental · unverified

Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. Prefer the programs archived by Software Heritage above. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.

Quadratic Equation Solver

Provenance: commit 67f434b434 · authored 2026-02-06T09:45:48+01:00 · agent claude-code · model sonnet · WebSearch disabled
code.f · added: 2026-02-06T08:44:08Z
C     QUADRATIC EQUATION SOLVER IN WATFIV
C     SOLVES AX**2 + BX + C = 0
      PROGRAM QUAD
      REAL A, B, C, DISC, X1, X2
      READ(5,100) A, B, C
100   FORMAT(3F10.2)
      DISC = B**2 - 4.0*A*C
      IF(DISC) 200, 300, 400
200   PRINT 201
201   FORMAT(' ROOTS ARE COMPLEX')
      STOP
300   X1 = -B/(2.0*A)
      PRINT 301, X1
301   FORMAT(' DOUBLE ROOT AT X = ', F10.4)
      STOP
400   X1 = (-B + SQRT(DISC))/(2.0*A)
      X2 = (-B - SQRT(DISC))/(2.0*A)
      PRINT 401, X1, X2
401   FORMAT(' ROOTS: X1 = ', F10.4, ' X2 = ', F10.4)
      STOP
      END

Contribute — propose a file extension

Tell us where to find evidence about WATFIV (mapped to pl/watfiv). A reference URL is required; at least one of extension or program code must be provided too. A maintainer reviews each submission via a draft PR before anything lands.
Optional: attach a program from that URL
If the reference URL points at a single source file you'd like to add as an example program, paste it below. The workflow will write it under languages/WATFIV/programs/<sha>/. Keep under ~200 lines.
(or open the pre-filled issue directly)
← WaterML WATFIV-S →