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This standard, designated FORTRAN 77, introduced many new statements into the language. In fact, the previous language standard FORTRAN 66 is a very small document and describes, what is in effect, a subset of most implementations of FORTRAN. For example, the WATFIV and WATFOR-11 implementations are based upon the IBM definition of FORTRAN-IV.
Initial Ratfor source code was ported to C in 1985 [1] and improved to produce Fortran 77 code too. [2] A git tree has been set in 2010 in order to revive ratfor . [3] Although the GNU C compiler had the ability to directly compile a Ratfor file (.r) without keeping a useless intermediate Fortran code (.f) (gcc foo.r), this functionality was lost in version 4 during the move in 2005 from f77 ...
For example, in BASIC: ... Fortran 77: final keyword is ... avoiding the need to have a series of ENDIF or other final statements at the end of a compound statement.
Fortran 77: A non-comment line is a continuation of the prior non-comment line if any non-space character appears in column 6. Comment lines cannot be continued. Comment lines cannot be continued. COBOL : String constants may be continued by not ending the original string in a PICTURE clause with ' , then inserting a - in column 7 (same ...
The letters denote a broad classification of the problem they solve, and the numbers serve to distinguish different codes. For example, the well known sparse LU code MA28 (superseded by MA48) is a Matrix Algebra code number 28. Fortran 95 codes are differentiated from Fortran 77 codes by the prefix HSL_.
An important practical extension to FORTRAN 77 was the release of MIL-STD-1753 in 1978. [37] This specification, developed by the U.S. Department of Defense, standardized a number of features implemented by most FORTRAN 77 compilers but not included in the ANSI FORTRAN 77 standard. These features would eventually be incorporated into the ...
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f2c is a program to convert Fortran 77 to C code, developed at Bell Laboratories.The standalone f2c program was based on the core of the first complete Fortran 77 compiler to be implemented, the "f77" program by Feldman and Weinberger.