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tutorials:fortran [2022/03/19 09:49]
papa 		tutorials:fortran [2022/03/19 09:52]
papa [DATE subroutine bug]
Line 25: Line 25:
 DATE is supposed to return a ten-character string representing the current system date with the format: DATE is supposed to return a ten-character string representing the current system date with the format:
  
-  dd-mmm-yyb+''dd-mmm-yyb''
  
 Where: Where:
  
-| dd | Day of month (leading zero converted to blank) | +| ''dd'' | Day of month (leading zero converted to blank) | 
-| mmm | Three-character abbreviation of month ("Jan", "Feb", ...) | +| ''mmm'' | Three-character abbreviation of month ("Jan", "Feb", ...) | 
-| yy | Last two digits of year | +| ''yy'' | Last two digits of year | 
-| b | blank character |+| ''b'' | blank character |
  
-However, since the year 2000, the subroutine has set the "yyb" portion of the returned date to the //first// three digits of the current year, giving the same value for all years of a given decade. For example, for every year between 2010 and 2019, DATE returned "201" in the "yyb" portion of the date string.+However, since the year 2000, the DATE has set the ''yyb'' portion of the returned date to the //first three// digits of the current year, giving the same value for all years of a given decade. For example, for every year between 2010 and 2019, DATE returned "201" in the ''yyb'' portion of the date string.
  
-This renders the year portion of DATE's output useless for most purposes. A work-around is to program a date subroutine in another language that correctly processes the TOPS-20 system date (such as MACRO assembly language) and call that subroutine from your FORTRAN source instead of the FORTRAN DATE subroutine.+This renders the year portion of DATE's output useless for most purposes. A work-around is to program a date subroutine in another language that correctly processes the TOPS-20 system date (such as MACRO assembly language) and call that subroutine from your FORTRAN program instead of the FORTRAN DATE subroutine.
  
 ==== Input/Output Devices ==== ==== Input/Output Devices ====
tutorials/fortran.txt · Last modified: 2022/03/19 09:52 by papa

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