Open Watcom FORTRAN 77 Language Reference

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<strong>Language</strong> <strong>Reference</strong> Definition: Name: ISHFT (generic) ISHFT I1ISHFT I2ISHFT Notes: ishft(j,n) Logical shift Usage: I ←ISHFT(I,I), I1 ←ISHFT(I1,I1), I2 ←ISHFT(I2,I2) I ←ISHFT(I,I) I1 ←I1SHFT(I1,I1) I2 ←I2SHFT(I2,I2) There are three shift operations: logical, arithmetic and circular. These shift operations are implemented as integer functions having two arguments. The first argument, j, is the value to be shifted and the second argument, n, is the number of bits to shift. If n is less than 0, a right shift is performed. If n is greater than 0, a left shift is performed. If n is equal to 0, no shift is performed. Note that the arguments are not modified. In a logical shift, bits shifted out from the left or right are lost. Zeros are shifted in from the opposite end. In an arithmetic shift, j is considered a signed integer. In the case of a right shift, zeros are shifted into the left if j is positive and ones if j is negative. Bits shifted out of the right are lost. In the case of a left shift, zeros are shifted into the right and bits shifted out of the left are lost. In a circular shift, bits shifted out one end are shifted into the opposite end. No bits are lost. 12.3.51 Binary Pattern Processing Functions: Arithmetic Shift Definition: Name: ISHA (generic) ISHA I1ISHA I2ISHA Notes: isha(j,n) Arithmetic shift Usage: I ←ISHA(I,I), I1 ←ISHA(I1,I1), I2 ←ISHA(I2,I2) I ←ISHA(I,I) I1 ←I1SHA(I1,I1) I2 ←I2SHA(I2,I2) There are three shift operations: logical, arithmetic and circular. These shift operations are implemented as integer functions having two arguments. The first argument, j, is the value to be shifted and the second argument, n, is the number of bits to shift. If n is less than 0, a right shift is performed. If n is greater than 0, a left shift is performed. If n is equal to 0, no shift is performed. Note that the arguments are not modified. In a logical shift, bits shifted out from the left or right are lost. Zeros are shifted in from the opposite end. 266 Intrinsic Functions
Functions and Subroutines In an arithmetic shift, j is considered a signed integer. In the case of a right shift, zeros are shifted into the left if j is positive and ones if j is negative. Bits shifted out of the right are lost. In the case of a left shift, zeros are shifted into the right and bits shifted out of the left are lost. In a circular shift, bits shifted out one end are shifted into the opposite end. No bits are lost. 12.3.52 Binary Pattern Processing Functions: Circular Shift Definition: Name: ISHC (generic) ISHC I1ISHC I2ISHC Notes: ishc(j,n) Circular shift Usage: I ←ISHC(I,I), I1 ←ISHC(I1,I1), I2 ←ISHC(I2,I2) I ←ISHC(I,I) I1 ←I1SHC(I1,I1) I2 ←I2SHC(I2,I2) There are three shift operations: logical, arithmetic and circular. These shift operations are implemented as integer functions having two arguments. The first argument, j, is the value to be shifted and the second argument, n, is the number of bits to shift. If n is less than 0, a right shift is performed. If n is greater than 0, a left shift is performed. If n is equal to 0, no shift is performed. Note that the arguments are not modified. In a logical shift, bits shifted out from the left or right are lost. Zeros are shifted in from the opposite end. In an arithmetic shift, j is considered a signed integer. In the case of a right shift, zeros are shifted into the left if j is positive and ones if j is negative. Bits shifted out of the right are lost. In the case of a left shift, zeros are shifted into the right and bits shifted out of the left are lost. In a circular shift, bits shifted out one end are shifted into the opposite end. No bits are lost. Intrinsic Functions 267
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Open Watcom FORTRAN 77 Language Ref
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Preface Open Watcom FORTRAN 77 is a
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Table of Contents 2.25 ELSE IF Stat
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Table of Contents 3.4.10 Hexadecima
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Table of Contents 11.7 Editing ....
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Table of Contents 12.6.1 ENTRY Stat
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Language Reference 2
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Language Reference 1.3 Source Progr
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Language Reference Example: * From
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Language Reference 8 Order of FORTR
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Language Reference Statement 1 2 3
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Language Reference 2.3 ADMIT Statem
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Language Reference If there is a LO
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Language Reference 2.5 Statement La
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Language Reference 2.6 AT END State
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Language Reference The FORTRAN 77 s
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Language Reference 6. A named block
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Language Reference It is important
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Language Reference 2.11 CHARACTER S
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Language Reference If a symbolic na
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Language Reference Example: LOOP RE
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Language Reference Example: REAL A,
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Language Reference a (d) len is an
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Language Reference 2.15 CONTINUE St
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Language Reference 2.17 DATA Statem
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Language Reference 2. As an extensi
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Language Reference 2.18 DEALLOCATE
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Language Reference 2.19 DIMENSION S
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Language Reference Transfer of cont
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Language Reference Example: * Illeg
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Language Reference c r is a constan
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Language Reference c r is a constan
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Language Reference 2.24 ELSE Statem
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Language Reference 2.26 END Stateme
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Language Reference 2.28 END BLOCK S
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Language Reference 2.30 ENDFILE Sta
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Language Reference 2.31 END GUESS S
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Language Reference 2.33 END LOOP St
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Language Reference 2.35 END SELECT
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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 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
Page 228 and 229: Language Reference 10.3 Records FOR
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Page 232 and 233: Language Reference Example: WRITE(1
Page 234 and 235: Language Reference 5. Any character
Page 236 and 237: Language Reference 224 Printing of
Page 238 and 239: Language Reference Example: REAL X
Page 240 and 241: Language Reference 11.6 Nonrepeatab
Page 242 and 243: Language Reference Example: PRINT
Page 244 and 245: Language Reference Example: INTEGER
Page 246 and 247: Language Reference 11.7.10.4 E and
Page 248 and 249: Language Reference n Example: is 4
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Page 258 and 259: Language Reference Example: * Illeg
Page 260 and 261: Language Reference 12.3.2 Type Conv
Page 262 and 263: Language Reference 12.3.7 Type Conv
Page 264 and 265: Language Reference 12.3.13 Remainde
Page 266 and 267: Language Reference 12.3.18 Choosing
Page 268 and 269: Language Reference 12.3.24 Square R
Page 270 and 271: Language Reference 12.3.28 Sine Def
Page 272 and 273: Language Reference 12.3.33 Arccosin
Page 274 and 275: Language Reference 12.3.38 Gamma Fu
Page 276 and 277: Language Reference 12.3.45 Lexicall
Page 280 and 281: Language Reference 12.3.53 Binary P
Page 282 and 283: Language Reference 12.3.58 Allocate
Page 284 and 285: Language Reference Example: INTEGER
Page 286 and 287: Language Reference 2. An array name
Page 288 and 289: Language Reference 5. A name that a
Page 290 and 291: Language Reference 12.8.1 Dummy Arg
Page 292 and 293: Language Reference Example: DIMENSI
Page 294 and 295: Language Reference 282 Subprogram A
Page 296 and 297: Appendices 284
Page 298 and 299: Appendices 10. The DOUBLE COMPLEX s
Page 300 and 301: Appendices 36. Non-character arrays
Page 303 and 304: Index AMAX1 253 AMIN0 254 $ AMIN1 2
Page 305 and 306: Index DATAN 260 dummy procedure 280
Page 307 and 308: Index AINT 250 ANINT 251 ASIN 259 H
Page 309 and 310: Index DREAL 249 IAND 264 DSIGN 252
Page 311 and 312: Index RETURN 32, 46, 56, 121, 132,
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Open Watcom FORTRAN 77 Language Reference

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