Open Watcom FORTRAN 77 Language Reference

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Language Reference The FORTRAN 77 standard specifies that it is illegal to backspace over records that were written using list-directed formatting; Open Watcom FORTRAN 77 allows it. If the file has been opened with access ’APPEND’, which is a form of sequential access in which the file is positioned at the endfile record, then the BACKSPACE statement cannot be used. For more information on input/output, see the chapter entitled "Input/Output" on page 215. 20 BACKSPACE Statement
FORTRAN Statements 2.8 BLOCK DATA Statement BLOCK DATA [sub] where: sub is an optional symbolic name of the block data subprogram and must not be the name of an external procedure, main program, common block, other block data subprogram, or any local name in the block data subprogram. The BLOCK DATA statement is used to define the start of a block data subprogram. A block data subprogram is used to provide initial values for variables and array elements in named common blocks. The only statements which are allowed to appear in a block data subprogram are: 1. IMPLICIT 2. PARAMETER 3. DIMENSION 4. COMMON 5. SAVE 6. EQUIVALENCE 7. DATA 8. STRUCTURE, END STRUCTURE 9. UNION, END UNION 10. MAP, END MAP 11. RECORD 12. END 13. type statements Example: BLOCK DATA INITCB DIMENSION A(10), B(10) COMMON /CB/ A, B DATA A/10*1.0/, B/10*2.0/ END In the above example, the arrays A and B in the named common block CB are initialized. Notes: 1. More than one named common block may appear in a block data subprogram. 2. All entities of the named common block(s) must be specified. 3. Not all entities need be given initial values. 4. Only entities that appear in (or are associated, through the EQUIVALENCE statement, with entries in) a named common block may be given initial values. 5. Only one unnamed block data subprogram may occur in an executable program. BLOCK DATA Statement 21
Page 1 and 2: Open Watcom FORTRAN 77 Language Ref
Page 3: Preface Open Watcom FORTRAN 77 is a
Page 6 and 7: Table of Contents 2.25 ELSE IF Stat
Page 8 and 9: Table of Contents 3.4.10 Hexadecima
Page 10 and 11: Table of Contents 11.7 Editing ....
Page 12 and 13: Table of Contents 12.6.1 ENTRY Stat
Page 14 and 15: Language Reference 2
Page 16 and 17: Language Reference 1.3 Source Progr
Page 18 and 19: Language Reference Example: * From
Page 20 and 21: Language Reference 8 Order of FORTR
Page 22 and 23: Language Reference Statement 1 2 3
Page 24 and 25: Language Reference 2.3 ADMIT Statem
Page 26 and 27: Language Reference If there is a LO
Page 28 and 29: Language Reference 2.5 Statement La
Page 30 and 31: Language Reference 2.6 AT END State
Page 34 and 35: Language Reference 6. A named block
Page 36 and 37: Language Reference It is important
Page 38 and 39: Language Reference 2.11 CHARACTER S
Page 40 and 41: Language Reference If a symbolic na
Page 42 and 43: Language Reference Example: LOOP RE
Page 44 and 45: Language Reference Example: REAL A,
Page 46 and 47: Language Reference a (d) len is an
Page 48 and 49: Language Reference 2.15 CONTINUE St
Page 50 and 51: Language Reference 2.17 DATA Statem
Page 52 and 53: Language Reference 2. As an extensi
Page 54 and 55: Language Reference 2.18 DEALLOCATE
Page 56 and 57: Language Reference 2.19 DIMENSION S
Page 58 and 59: Language Reference Transfer of cont
Page 60 and 61: Language Reference Example: * Illeg
Page 62 and 63: Language Reference c r is a constan
Page 64 and 65: Language Reference c r is a constan
Page 66 and 67: Language Reference 2.24 ELSE Statem
Page 68 and 69: Language Reference 2.26 END Stateme
Page 70 and 71: Language Reference 2.28 END BLOCK S
Page 72 and 73: Language Reference 2.30 ENDFILE Sta
Page 74 and 75: Language Reference 2.31 END GUESS S
Page 76 and 77: Language Reference 2.33 END LOOP St
Page 78 and 79: Language Reference 2.35 END SELECT
Page 80 and 81: Language Reference 2.37 END UNION S
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Language Reference 2.39 ENTRY State
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Language Reference The following ex
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Language Reference 2.42 EXIT Statem
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Language Reference 2.44 FORMAT Stat
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Language Reference 2.45.2 Extended
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Language Reference 2.47 Computed GO
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Language Reference * Illegal use of
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Language Reference 2.50 Arithmetic
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Language Reference An example of an
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Language Reference IF( I .EQ. 10 )T
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Language Reference 2.53.3 IMPLICIT
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Language Reference 2.54 INCLUDE Sta
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Language Reference Example: LOGICAL
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Language Reference It is assigned t
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Language Reference 3. This specifie
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Language Reference a (d) len is an
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Language Reference 2.57 INTRINSIC S
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Language Reference 2.59 LOOP Statem
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Language Reference 2.61 NAMELIST St
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Language Reference Example: &PERSON
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Language Reference FILE = fin fin i
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Language Reference Notes: 1. If the
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Language Reference 2.64 PARAMETER S
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Language Reference 2.66 PRINT State
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Language Reference Example: PRINT 1
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Language Reference 2.68 QUIT Statem
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Language Reference 2. An internal f
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Language Reference Example: READ( 8
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Language Reference 2.71 RECORD Stat
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Language Reference 2.73 RETURN Stat
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Language Reference Notes: 1. The un
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Language Reference PROGRAM MAIN . .
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Language Reference Example: SELECT
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Language Reference 2.78 STRUCTURE S
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Language Reference 2.80 UNION State
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Language Reference 2.82 VOLATILE St
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Language Reference 2.84 WHILE State
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Language Reference REC = rn IOSTAT
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Language Reference 150
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Language Reference Example: DO10I=1
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Language Reference 123.764 .4352344
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Language Reference Actually, holler
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Language Reference 158 Symbolic Con
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Language Reference [lo:] hi where:
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Language Reference 4.4 Classifying
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Language Reference 4.5 Classifying
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Language Reference Example: CHARACT
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Language Reference STRUCTURE /PERSO
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Language Reference SUBROUTINE PRINT
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Language Reference 172 Unions
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Language Reference Operator Arithme
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Language Reference 7.1.3 Arithmetic
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Language Reference 7.2 Character Ex
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Language Reference where: relop is
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Language Reference Note that the op
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Language Reference 1. logical term
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Language Reference 186 Constant Exp
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Language Reference 8.3 Logical Assi
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Language Reference 8.6 Extended Ass
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Language Reference 192 Extended Ass
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Language Reference Examples follow
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Language Reference 9.4 DO - END DO
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Language Reference The next example
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Language Reference where: stmt is a
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Language Reference Example: * Illeg
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Language Reference - the string -10
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Language Reference 9.12 GUESS-ADMIT
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Language Reference 9.13 QUIT QUIT [
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Language Reference Example: LOOP RE
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Language Reference READ statement t
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Language Reference 214 Notes on Str
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Language Reference 10.3 Records FOR
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Language Reference accessed directl
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Language Reference Example: WRITE(1
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Language Reference 5. Any character
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Language Reference 224 Printing of
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Language Reference Example: REAL X
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Language Reference 11.6 Nonrepeatab
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Language Reference Example: PRINT
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Language Reference Example: INTEGER
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Language Reference 11.7.10.4 E and
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Language Reference n Example: is 4
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Language Reference and is read into
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Language Reference 3. An input item
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Language Reference 1. Blanks are ne
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Language Reference e is an expressi
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Language Reference Example: * Illeg
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Language Reference 12.3.2 Type Conv
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Language Reference 12.3.7 Type Conv
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Language Reference 12.3.13 Remainde
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Language Reference 12.3.18 Choosing
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Language Reference 12.3.24 Square R
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Language Reference 12.3.28 Sine Def
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Language Reference 12.3.33 Arccosin
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Language Reference 12.3.38 Gamma Fu
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Language Reference 12.3.45 Lexicall
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Language Reference Definition: Name
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Language Reference 12.3.53 Binary P
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Language Reference 12.3.58 Allocate
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Language Reference Example: INTEGER
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Language Reference 2. An array name
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Language Reference 5. A name that a
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Language Reference 12.8.1 Dummy Arg
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Language Reference Example: DIMENSI
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Language Reference 282 Subprogram A
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Appendices 284
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Appendices 10. The DOUBLE COMPLEX s
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Appendices 36. Non-character arrays
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Index AMAX1 253 AMIN0 254 $ AMIN1 2
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Index DATAN 260 dummy procedure 280
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Index AINT 250 ANINT 251 ASIN 259 H
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Index DREAL 249 IAND 264 DSIGN 252
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Index RETURN 32, 46, 56, 121, 132,
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Open Watcom FORTRAN 77 Language Reference

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