SIMSCRIPT II.5 Programming Language

Table of Contents
Preface ................................................................................................................ a
1. SIMSCRIPT II.5 BASIC CONCEPTS ................................................................... 1
1.1 INTRODUCTION........................................................................................... 1
1.2 VARIABLES ................................................................................................ 1
1.3 READING INPUT DATA ................................................................................ 2
1.4 CONSTANTS ............................................................................................... 3
1.5 ARITHMETIC EXPRESSIONS ......................................................................... 4
1.6 COMPUTING VARIABLE VALUES ................................................................. 5
1.7 SPECIALIZED COMPUTATION STATEMENTS .................................................. 6
1.8 DISPLAYING THE RESULTS OF COMPUTATION .............................................. 6
1.9 SKIPPING UNWANTED INPUT DATA .............................................................. 9
1.10 LOGICAL EXPRESSIONS .......................................................................... 10
1.11 CHANGING THE FLOW OF COMPUTATION USING LOGICAL EXPRESSIONS .. 12
1.12 MORE ON LOGICAL EXPRESSIONS .......................................................... 16
1.13 REPETITION USING CONTROL PHRASES................................................... 19
1.14 CONTROL PHRASES EXTENDED TO COVER MORE THAN ONE STATEMENT 21
1.15 LOGICAL CONTROL PHRASES ................................................................. 22
1.16 ALTERING THE FLOW OF CONTROL WITHIN A LOOP................................. 26
1.17 CHANGING THE FLOW OF CONTROL BY DIRECT ORDER .......................... 27
1.18 THE LOGICAL END OF A PROGRAM ......................................................... 29
1.19 THE PHYSICAL END OF A PROGRAM ....................................................... 29
1.20 A NOTE ON SIMSCRIPT II.5 PROGRAM FORM ....................................... 29
1.21 CLARIFYING COMMENTS IN A PROGRAM ................................................. 30
1.22 SOME SAMPLE SIMSCRIPT II.5 LEVEL 1 PROGRAMS ............................ 31
1.22.1 Roots of a Quadratic Expression .....................................................................31
1.22.2 Finding the Area of a Triangle ..........................................................................32
1.22.3 Finding the Maximum and Minimum of a Set of Numbers ...............................33
1.22.4 Computing Square Roots .................................................................................34
2. PROGRAMMING LANGUAGE CONCEPTS ............................................................ 37
2.1 VARIABLE AND LABEL NAMES REVISITED ................................................. 37
2.2 VARIABLE MODES ................................................................................... 37
2.2.1 REAL and INTEGER Variables .........................................................................38
2.3 EXPRESSION MODES ............................................................................... 40
2.4 SYSTEM-DEFINED CONSTANTS ................................................................. 42
2.5 SUBSCRIPTED VARIABLES ........................................................................ 43
2.6 READING SUBSCRIPTED VARIABLES.......................................................... 49
2.7 USING SUBSCRIPTED VARIABLES IN EXPRESSIONS .................................... 50
2.8 NESTED DO LOOPS ................................................................................. 51
2.9 THE STRUCTURE OF A SIMSCRIPT II.5 PROGRAM ................................... 51
2.10 ROUTINE DEFINITION ............................................................................. 54
2.11 GLOBAL AND LOCAL VARIABLES ............................................................. 56
2.12 ROUTINE ARGUMENTS ........................................................................... 60
2.13 ROUTINES USED AS FUNCTIONS ............................................................. 62
2.14 GLOBAL AND LOCAL VARIABLES, ROUTINES, FUNCTIONS, AND SIDE
EFFECTS .............................................................................................. 64
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