Fortran question for Unix System-5 r3.
When executing fortran programs requiring "input" the screen will
show a blank screen. After entering input anyway the program
completes under Unix System V *r3*.
When the same program is compiled under Unix System V *r1* it
works as expected. The user sees the prompt.
Sounds like on Unix System V *r3* the output buffer is not being flushed.
I tried re-compiling F77. No help. Is it possible to check the runtime
libraries to see if fflush is missing?
Fortran program follows:
PROGRAM EASTER
INTEGER YEAR,METCYC,CENTRY,ERROR1,ERROR2,DAY
INTEGER EPACT,LUNA
C A PROGRAM TO CALCULATE THE DATE OF EASTER
PRINT '(A)',' INPUT THE YEAR FOR WHICH EASTER'
PRINT '(A)',' IS TO BE CALCULATED'
PRINT '(A)',' ENTER THE WHOLE YEAR, E.G. 1978 '
READ '(A)',YEAR
C CALCULATING THE YEAR IN THE 19 YEAR METONIC CYCLE-METCYC
METCYC = MOD(YEAR,19)+1
IF(YEAR.LE.1582)THEN
DAY = (5*YEAR)/4
EPACT = MOD(11*METCYC-4,30)+1
ELSE
C CALCULATING THE CENTURY-CENTRY
CENTRY = (YEAR/100)+1
C ACCOUNTING FOR ARITHMETIC INACCURACIES
C IGNORES LEAP YEARS ETC.
ERROR1 = (3*CENTRY/4)-12
ERROR2 = ((8*CENTRY+5)/25)-5
C LOCATING SUNDAY
DAY = (5*YEAR/4)-ERROR1-10
C LOCATING THE EPACT(FULL MOON)
EPACT = MOD(11*METCYC+20+ERROR2-ERROR1,30)
IF(EPACT.LT.0)EPACT=30+EPACT
IF((EPACT.EQ.25.AND.METCYC.GT.11).OR.EPACT.EQ.24)THEN
EPACT=EPACT+1
ENDIF
ENDIF
C FINDING THE FULL MOON
LUNA=44-EPACT
IF(LUNA.LT.21)THEN
LUNA=LUNA+30
ENDIF
C LOCATING EASTER SUNDAY
LUNA=LUNA+7-(MOD(DAY+LUNA,7))
C LOCATING THE CORRECT MONTH
IF(LUNA.GT.31)THEN
LUNA = LUNA - 31
PRINT '(A)',' FOR THE YEAR ',YEAR
PRINT '(A)',' EASTER FALLS ON APRIL ',LUNA
ELSE
PRINT '(A)',' FOR THE YEAR ',YEAR
PRINT '(A)',' EASTER FALLS ON MARCH ',LUNA
ENDIF
END
Any help would be appreciated,
Ken
--
WWL 📚
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