Appendix B Intrinsic Functions | Intel fortran-80 specs

APPENDIX B I

INTRINSIC FUNCTIONS

The following table lists the intrinsic (or predefined) functions available with FORTRAN-SO. An intrinsic function is executed in an expression by referencing its name followed by some argument in parentheses. If more than one argument is needed, they are separated by commas and all arguments must be of the same type. All angles are expressed in radians.

C= SQRT(A**2 + B**2)

K = I + MOD(M, N)

PAY = BASE*40.0 + (l.5*BASE)*(AMAXI(O.O,HOURS-40.0»

The list of functions is qualified by the notes following the list. See also the discus- sion of intrinsic functions in section 5.1.1.

B.1 Intrinsic Function Summary

TYPE OF

FORM

CATEGORY

FUNCTION

ARGUMENTS

FUNCTION

INT (a)

Type conversion

Convert a to type integer

Real

Integer

(note 1)

IFIX (a)

Type conversion

Convert a to type integer

Real

Integer

(note 1)

REAL (a)

Type conversion

Convert a to type real

Integer

Real

(note 2)

FLOAT (a)

Type conversion

Convert a to type real

Integer

Real

(note 2)

ICHAR (a)

Type conversion

Convert a to type integer

Character

Integer

(note 3)

AINT (a)

Truncation

Truncate a to integer value

Real

Real

(note 1)

ANINT(a)

Rounding

Round a to nearest whole

Real

Real

number

NINT (a)

Rounding

Round a to nearest integer

Real

Integer

lABS (a)

Absolute value

Return absolute value of a

Integer

Integer

ABS (a)

Absolute value

Return absolute value of a

Real

Real

MOD (aI, a2)

Remaindering

Return remainder from aI/a2

Integer

Integer

(notes 1,4)

AMOD (aI, a2)

Remaindering

Return remainder from alla2

Real

Real

(notes 1,4)

ISIGN (aI, a2)

Sign transfer

Transfer sign of a2 to al

Integer

Integer

(note 5)

-

B-1

Image 103

Intel fortran-80 manual Appendix B Intrinsic Functions, Intrinsic Function Summary

Contents

FORTRAN-SO Programming Manual Prompt Preface Page Contents Chapter Programming Guidelines Illustrations Glossary FORTRAN-SO An Introductory Example Chapter Introduction to FortranComment Lines Output Statements Type StatementInput Statements Value Assignment Statement Nonexecutable Statements Summary Of FORTRAN·SO StatementsProgram Termination Executable Statements Format Order of Statements Chapter Fortran Concepts Program Units and ProceduresFortran Program Structure Statements and Lines Prog RAM StatementProgram name = 8*C + D* *2/E Fortran Statement ElementsCharacter Set #Pol.1ndSign B52 Constants and Variables Arithmeticoverflow Error Murphyslaw Sl#d ...b Where+64101 #14010 #4567Q +#AF2CH Sqdiag = Sqrt 2*S* *2 Sperim = 4*S Sqarea = S**2 Relational Expressions OP1 NOT.OP1 True False False True If Numb .GT Stop If Pname .EO. Gehrigprint 20, PNAME, AVGEXP1 operator EXP2 EXP1 EXP2 operator Stop OP1 OP2 OP1 .NEQV. OP2 Precedence of Operators 15/3 + 18/9 = 5 + 2 = 15/3 + 18/9 = 15/3 + 2 = 15/5 = Scope of Symbols Call sub arg,arg Notational ConventionsCall ROUT1A, 3.72 Page Integer Type Statement Chapter Defining Variables ARRAYS, and MemoryType Statements Real Type Statement Va,luernustueiA, Qp4 Logical Type Statement Len Aryd* len Character * len, name ,name Character TICTAC3,3 Logical ,3,3 Array DefinitionImplicit REALA-B, D-H, Character C Implicit Integer I-N, Logical O-l ARRAY3,MI00LE,THIRD Dimension StatementLogical Table Integer Array Dimension ,3, ARRAY3,3,3 Kinds of Array Declarators Ary s ,s Dimension ,3Properties of Arrays Referencing Array Elements ARRAY2,6 = a Arrayi + J, 3 = ARRAYM,M + N,M-N = a + SQRT8 Assignment Statements Arithmetic Assignment Statement CHARACTER*10 NAMES4, MGR MGR = Stengel NAMES1 = Gehrig = expLogical FLAG, ,3 = char R*c Data StatementAssign stlTO name Assign 1010 to LOOP1 Goto LOOP1 Data I,J,K/10,20,301 Equivalence StatementData Zeros 110*0/1,J,K 110,20,301 &NAMES2 Iotti Fpnumb Common StatementReal Fpnumb Array List Block Data Subprograms Block Data name Block Data StatementZEROS/1 0 Computed GO to Statement Program Execution ControlsTransferring Program Oontrol Unconditional GO to Statement Arithmetic if Statement Assigned GO to StatementAssign 10TO Start Gotostart Assign 999 to Done If Done Pause If .NOT. Done GO to Start Logical if Statement6 IF, Else IF, and Else Blocks Done = a * *2 .GT **2 Else if exp then Block if StatementElse if Statement If exp then Else if Flag .EO then Write 6,40 Fedtax Else StatementEND if Statement If Flag .EO then Operation of a do Loop Loop Control StatementsDo Statement CHARACTER*12 Pname Program Termination StatementsContinue Statement Continue Pause BREAK12 Pause StatementStop Statement Pause Intrinsic and Statement Functions Chapter Functions and SubroutinesIntrinsic Functions Intrinsic Sqrt Intrinsic EXP, LOG, LOG10 Intri Nsic StatementStatement Functions Intrinsic tunc ,tunc 156.8 Function Statement External Procedures Total = Total + Arrayk 100CONTINUE Return END SubroutinesFunction Subprogram Limitations Do 100 K = 1 SU Brouti N E subdum,dum Subroutine StatementRetu RN Statement Program CALL.. Subroutine External proe ,proe Save StatementExternal Statement Save lebl ,Iebl Call Statement Arguments And Common Blocks Revisited Dummy And Actual Arguments Common BlocksAssociation Of Arguments Agreement Of Argument Lengths Function FA,B,C FX, YPage File Properties Chapter INPUT/OUTPUTRecords, Files, And Units Record Properties External And Internal Files File ExistenceFile Name File Position Unit Properties File Access 1.2 1/0 Status Specifier File-Handling StatementsOpen Statement Unit Specifier File Name Specifier Error SpecifierFile Status Specifier Formatting Specifier Access Method SpecifierAccess = Sequential Access = SEQUENTIAL,FORM = Formatted Blank = blnk Open 3, FILE=CARDS,STATUS=NEW,ACCESS=DIREcrBlank Specifier Form = FORMATTED,RECL=80 Close 3, IOSTAT= ERRFLG, ERR= Close StatementOpening a Connected Unit Close close-list Backspace Backspace StatementRewi N D Statement File Disposition Specifier Endfile arg-list Data-Transfer 1/0 StatementsEndfile Statement Read Statement Read 2 PNAME, AB, Hits Control Information ListFMT =f Read 25, Pnam E, AS, Hits Read 2,25 PNAME, AS, HitsAssign 25 to Infmt Read 2,INFMT Pname Implied-DO List Input ListWrite ctl-list out-list Print 120, PNAME, AVG Formatted And Unformatted Data TransferPrint Statement Unformatted Data Transfer Printing Formatted Records Formatted Data Transfer Stl Format flist Format Statement Is Ff Y1 Y2 Y3 OY1 Y2± Y1 Y2···Ye Z5editdesctiptor Either a sjgu ora letter indicatingthebas¢ Write 7,100 Write 7,100 Itstno Format Thisis the Test NUMBER,2XFormat 1X, A12, 4X, F4.3 DollytSigfjl$ijitrrrg· Read 2,50 INTNUM, Fpnum Format A20, $ List·Directed FormattingList-Directed Input Paint 25, Pname List-Directed Output Page Program Documentation Problem DefinitionChapter Programming Guidelines Program Development Level One Refining The Problem DefinitionLevel Two Write unit, 60 EMP, HRS, GRPAY, Netpay Format flist Otherwise Print Employee Data and Update Totals ElseFinal Coding Level Three Crossing Unit Lines Fortran CodingFunctions And Subroutines GO to Statement PI = ReferencesReminders = 2217*r* *2 Programming Guidelines Statement Sequence Appendix a FORTRAN-80 Statement SummaryStatement Summary ERR = stl Stat Iostat =Stname Status = Continue execution provides END FORTRAN-80 FORTRAN-80 FORTRAN-SO Iostat = Return Rewind Statement Subroutine Statement Category Executable Text Reference .2.2 Intrinsic Function Summary Appendix B Intrinsic Functions Category Function Arguments Int-12.8 = Page Hollerith Constants In Data Statements Appendix C Hollerith Data TypeHollerith As a Data Type Hollerith Constant AEditing Of Hollerith Data Hollerith Format Specification Standard Extensions To 1977 Subset Appendix D Extensions to Ansi FortranNonstandard Extensions To 1977 Fortran Differences From 1966 Fortran More Specific Semantics Than 1977 Fortran FORTRAN-80 Page Ascii Codes Ascii CodesPage Processor Limitations On Language Appendix F 8080/8085 Processor DependenciesCompiler Extensions $REENTRANT Where the $must be in columnCall Input port, var Call Output port, exp Call INPUT1, TEST1 Call OUTPUT2 $0077 Default Data LengthsInterpretation of do Statements Including Source Files F1MYPROG UNIT4 LP, Unit 5 Fosysin Unit n = device Index Block Data Function Subroutine Index Page Page Page Inter Postage will be paid by Addressee WED Like Your Comments Request for Readerscomments 111111 Page Inter