BLANK LINE SIMPLY FORTRAN PORTABLE

The following Fortran code examples or sample programs show different situations depending on the compiler.Not to detract from announcement of a new portable FOCAL, I followed up on the idea of a 6502 FOCAL, and found pages on FOCAL for the KIM-1 - the Aresto version, not the previously mentioned Programming Group version. The first set of examples are for the Fortran II, IV, and 77 compilers. The remaining examples can be compiled and run with any newer standard Fortran compiler (see the end of the main Fortran article for lists of compilers). the line-length may be limited to 72 characters (derived from the 80-byte width of a punch-card, with last 8 characters reserved for (optional) sequence numbers).continuation lines must have a non-blank character in column 6.statement labels must occur in columns 1-5.comments must begin with a * or C or ! in column 1.NOTE: Before FORTRAN 90, most FORTRAN compilers enforced fixed-format source code, a carryover from IBM punch cards Other standards, if supported, may be selected manually with a command line option.īy convention most contemporary Fortran compilers select the language standard to use during compilation based on source code file name suffix: FORTRAN 77 for.

BLANK LINE SIMPLY FORTRAN FREE

Some compilers also offer free form source by using a compiler flag Area Of a Triangle program Simple Fortran II program If errors are produced when you compile your FORTRAN code, first check the column alignment.

If one of the input values is zero, then the program will end with an error code of '1' in the job control card listing following the execution of the program. Normal output will be one line printed with A, B, C, and AREA. No specific units are stated.Ĭ AREA OF A TRIANGLE - HERON'S FORMULA C INPUT - CARD READER UNIT 5, INTEGER INPUT, ONE BLANK CARD FOR END-OF-DATA C OUTPUT - LINE PRINTER UNIT 6, REAL OUTPUT C INPUT ERROR DISPAY ERROR MESSAGE ON OUTPUT 501 FORMAT ( 3 I5 ) 601 FORMAT ( 4 H A =, I5, 5 H B =, I5, 5 H C =, I5, 8 H AREA =, F10. 0 ) GO TO 90 S = ( A + B + C ) / 2.0 AREA = SQRT ( S * ( S - A ) * ( S - B ) * ( S - C ) ) WRITE ( 6, 601 ) A, B, C, AREA GO TO 10 50 WRITE ( 6, 602 ) STOP 90 WRITE ( 6, 603 ) STOP END Simple Fortran 77 program 2, $ 13 H SQUARE UNITS ) 602 FORMAT ( 10 HNORMAL END ) 603 FORMAT ( 23 HINPUT ERROR, ZERO VALUE ) INTEGER A, B, C 10 READ ( 5, 501 ) A, B, C IF ( A. This program has two input checks in the READ statement with the END and ERR parameters, one for a blank card to indicate end-of-data and the other for zero value along with valid data. In either condition, a message will be printed.Ĭ AREA OF A TRIANGLE - HERON'S FORMULA C INPUT - CARD READER UNIT 5, INTEGER INPUT, NO BLANK CARD FOR END OF DATA C OUTPUT - LINE PRINTER UNIT 6, REAL OUTPUT C INPUT ERROR DISPAYS ERROR MESSAGE ON OUTPUT 501 FORMAT ( 3 I5 ) 601 FORMAT ( ' A= ', I5, ' B= ', I5, ' C= ', I5, ' AREA= ', F10. 2, $ 'SQUARE UNITS' ) 602 FORMAT ( 'NORMAL END' ) 603 FORMAT ( 'INPUT ERROR OR ZERO VALUE ERROR' ) INTEGER A, B, C 10 READ ( 5, 501, END = 50, ERR = 90 ) A, B, C IF ( A = 0. C = 0 ) GO TO 90 S = ( A + B + C ) / 2.0 AREA = SQRT ( S * ( S - A ) * ( S - B ) * ( S - C ) ) WRITE ( 6, 601 ) A, B, C, AREA GO TO 10 50 WRITE ( 6, 602 ) STOP 90 WRITE ( 6, 603 ) STOP END 'Retro' FORTRAN IVĪ retro example of a FORTRAN IV (later evolved into FORTRAN 66) program deck is available on the IBM 1130 page, including the IBM 1130 DM2 JCL required for compilation and execution. An IBM 1130 emulator is available at IBM that will allow the FORTRAN IV program to be compiled and run on a PC.

Blank line simply fortran