TOPS-20 PASCAL Language Manual - Bitsavers

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PROCEDURES AND FUNCTIONS Table ~-2: Predeclared Functions (Cont.) Category Function Parameter Result Type Type Purpose PRED(a) SUCC(a) any scalar type except a r eaJ type any scaJar type except a real type same type as parameter Returns the predecessor value in the type of a (if a predecessor exists). But it is up to you to make sure there is pred/succ. The compiJer will always return with the next ordinal value higher/lower than a. There is no bounds checking. Checking 0ccurs only if the PRED(a) or SUCC(a) is in an ass ignmen t statement, for example: (*$CHE~K+*) x: =PRED (a) same Returns the type as successor value in parameter the type of a (if a successor exists) . PASCAL also provides additional arithmetic routines available with PASLIB, the PASCAL library. Use the following format to specify a routine from the Common Math Library: where: reSUl t type;} FUNCTION routine name (VAR parameter list): { FORTRAN routine name is one of the names listed in Table ~-3. parameter list are acceptable arguments for this routine. See the TOPS-IO/TOPS-20 Common Math Library Reference Manual. result type is the type of the function result. Table ~-3 lists these routines and their purpose. For more information concerning these routines, refer to the TOPS-IO/TOPS-20 Common Math Library Reference Manual. 6-16
PROCEDURES AND FUNCTIONS Table h-3: Library Routines Routine Name Purpose ARCOS AINT ALOG ALOGlO AMAXO AMINO AMINI AMOD ANINT ASIN ATAN2 COSD COSH COTAN DABS DACOS DASIN DATAN arc cosine truncation to integer natural logarithm base-l0 logarithm largest of a series smalJest of a series smallest of a series rE!mainder nearest whole number a roc sine arc tangent of two angles cosine (angle in degrees) hyperbolic cosine contangent double-precision D-floating-point absolute value double-precision D-floating-point arc cosine doubJe-precision D-floating-point arc sine doubJe-precision D-floating-point arc tangent DATAN2 double-precision D-floating-point arc t\ol70 angles tangent of DBLE DCOS DCOSH DCOTAN DDIM DEXP DEAXP2. conversion from single-precision to doubJe-precision D-floating-point format double precision D-floating-point cosine double-precision D-floating-point hyperbolic cosine double-precision D-floating-point cotangent d 0 ubI e- prE! cis ion differenCE! D-floating-point double-precision D-floating-point exponential positive exponentiation of a double-precision D-floating-point number to the power of an integer 6-17
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TOPS-20 PASCAL Language Manual AA-L
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CONTENTS PREFACE CHAPTER 1 INTRODUC
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7 • 1 . 1 7 . 1 . 2 7 • 1 . 3 7
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G-l G-2 G-3 G-4 Status of Stack Aft
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• Appendix A lists the various me
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CHAPTER I INTRODUCTION PASCAL-20 is
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PROGRAM Calculator (INPUT, OUTPUT);
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INTRODUCTION 1.1.6 Compilation Unit
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INTRODUCTION 1.2.3 Identifiers PASC
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INTRODUCTION The semicolon and the
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INTRODUCTION In the following examp
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CHAPTER 2 PASCAL DATA TYPES This ch
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PASCAL DATA TYPES In addition to de
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PASCAL DATA TYPES You can use strin
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PASCAL DATA TYPES The base type can
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PASCAL DATA TYPES is BOOLEAN, then
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PASCAL DATA TYPES In the three-dime
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PASCAL DATA TYPES To assign values
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PASCAL DATA TYPES 2.3.1.5 Array Exa
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PASCAL DATA TYPES The fields in thi
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PASCAL DATA TYPES 2.3.2.2 Assigning
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PASCAL DATA TYPES For example, assu
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PASCAL DATA TYPES Sets are compatib
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PASCAL DATA TYPES Example 3 F I 1..
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PASCAL DATA TYPES Pointer type defi
Page 53: PASCAL DATA TYPES Example 2 VAR Cit
Page 56 and 57: EXPRESSIONS Table 3-1: Arithmetic O
Page 58 and 59: EXPRESSIONS TabJe 1-2: Result Types
Page 60 and 61: EXPRESSIONS The set operators (+, *
Page 62 and 63: EXPRESSIONS PROGRAM Level_.O (IN PU
Page 65 and 66: CHAPTEH 4 PROGRAM HEADING AND DECLA
Page 67 and 68: PROGRAM HEADING AND DECLARATION SEC
Page 69 and 70: PROGRAM HEADING AND DECLARATION SEC
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Page 74 and 75: PASCAL STATEMENTS Simple and compou
Page 76 and 77: PASCAL STATEMENTS Example q Ase~5 :
Page 78 and 79: PASCAL STATEMENTS The objects of th
Page 80 and 81: PASCAL STATEMENTS Example 1 CASE EN
Page 82 and 83: PASCAL STATE~ENTS Example 4 := 1 TO
Page 84 and 85: PASC~L STATEMENTS 5.5 THE WITH STAT
Page 86 and 87: PASCAL STATEMENTS Example FOR I :=
Page 89 and 90: CHAPTER ~ PROCEDURES AND FUNCTIONS
Page 91 and 92: PROCEDURES AND FUNCTIONS Table ~-l:
Page 93 and 94: PROCEDURES AND FUNCTIONS Table ~-1:
Page 95 and 96: PROCEDURES AND FUNCTIONS This progr
Page 97 and 98: PROCEDURES AND FUNCTIONS You can al
Page 99 and 100: PROCEDURES AND FUNCTIONS This progr
Page 101 and 102: PROCEDURES AND FUNCTIONS Boolean fu
Page 103: PROCEDURES AND FUNCTIONS Table ~-2:
Page 107 and 108: PROCEDURES AND FUNCTIONS Table ~-3:
Page 109 and 110: PROCEDURES AND FUNCTIONS Data items
Page 111 and 112: PROCEDURES AND FUNCTIONS The actual
Page 113 and 114: PROCEDURES AND FUNCTIONS An optiona
Page 115 and 116: PROCEDURES AND FUNCTIONS Example 1
Page 117 and 118: PROCEDURES AND FUNCTIONS Fo rma t 1
Page 119 and 120: PROCEDURES AND FUNCTIONS As a resul
Page 121 and 122: PROCEDURES AND FUNCTIONS label sect
Page 123 and 124: PROCEDURES AND FUNCTIONS The functi
Page 125 and 126: PROCEDURES AND FUNrTIONS Example 1
Page 127 and 128: CHAPTER 7 INPUT AND OUTPUT This cha
Page 129 and 130: INPUT AND OUTPUT In executing this
Page 131 and 132: INPUT AND OUTPUT where: file variab
Page 133 and 134: INPUT AND OUTPUT When you reach the
Page 135 and 136: INPUT AND OUTPUT To specify only th
Page 137 and 138: INPUT AND OUTPUT 7.7.4 Record Type
Page 139 and 140: INPUT AND OUTPUT This example cause
Page 141 and 142: INPUT AND OUTPUT 7.9 THE PUT PROCED
Page 143 and 144: INPUT AND OUTPUT READ does not read
Page 145 and 146: INPUT AND OUTPUT This program fragm
Page 147 and 148: INPUT AND OUTPUT You must call REWR
Page 149 and 150: INPUT AND OUTPUT The following rule
Page 151 and 152: INPUT AND OUTPUT This example write
Page 153 and 154: INPUT l\ND OUTPUT Example 1 BEGIN W
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INPUT AND OUTPUT The first referenc
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USING PASCAL ON TOPS-20 8.2 FILE SP
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USING PASCAL ON TOPS-20 After plann
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USING P~SCAL ON TOPS-20 /TAKE The /
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USING PASCAL ON TOPS-20 If you omit
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USING PASCAL ON TOPS-20 The first c
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• AVERAGE SCORE SOURCE LISTING o
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USING PASCAL ON TOPS-20 The compile
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USING PASCAL ON TOPS-20 8.4.6.3 Cro
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USTNG PASCAL ON TOPS-20 Example 3 f
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PASDDT: THE PASCAL-20 DEBUGGER 9.3
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PASDDT: THE PASCAL-?O DEBUGGER cons
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PASDDT: THE PASCAL-20 DEBUGGER As s
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PASDDT: THE PASCAL-20 DEBUGGER Note
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PASDDT: THE PAS~AL-20 DEBUGGER ]. T
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P~SDDT: THE PASCAL-?O DEBUGGER To r
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._------------- Table A-I: Run-time
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PASCAL MESSAGES -------------------
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PASCAL MESSAGES ? PASOl7 "BEGIN" ex
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PASCAL MESSAGES ? PASIOS Sign not a
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PASCAL MESSAGES ? PAS130 Expression
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PASCAL MESSAGES ? PAS157 Case label
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PASCAL MESSAGES ? PAS184 External p
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PASCAL MESSAGES ? PAS?II Incorrect
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PASCAL MESSAGES ? PAS253 Too many a
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PASCAL MESSAGES % PAS457 Nonstandar
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ASCII CHARACTER SET Table 8-1: The
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APPENDIX C SYNTAX SUMMARY This appe
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SYNTAX Sm1MARY ::= I I I I
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SYNTAX Sur~MARY ::= := ::= I
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SYNTAX SU~1MARY ::= ft ::= ::=
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SYNTAX SUr-1MARY ""= ::= ,
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-------- ---- ---- ----------------
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ISO COMPLIANCE 4. A program paramet
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ISO CO~PLIANCE The DISPOSE procedur
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ISO COMPLIANCE In the UNPACK(z,i. ,
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ISO COMPLIANCE In a FOR statement,
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APPENDIX F DIFFERENCES BETWEEN PASC
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DIFFERENCES BETWEEN PASCAL-20 AND V
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APPENDIX G PROCEDURE AND FUNCTION C
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PROCEDURE AND FUNCTION CALLING SEQU
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PROCEDURE ~ND FUNCTION CALLING SEQU
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INDEX /ABORT switch, 8-7 ABS functi
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Function (Cont.) EOF, 1-7, 6-14 EOL
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INDEX (Co n t. ) Set operator, 1-8,
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- Do Not Tear - Fold Here and Tape
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