The translation of high-level computer languages to other high-level languages
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This thesis is an investigation into the extent to which the
language, FORTRAN, can be converted automatically to Pascal. Much
has been written and said about the advantages of a "structured"
language but there seems to be some reluctance for the computing
community, as a whole, to adopt a structured language. A large amount
of investigative work has been carried out by other workers into the
possibility of extending FORTRAN to include some of the concepts of
structured programming and other people have begun projects to
convert FORTRAN to other structured languages but this is the first
known attempt to convert FORTRAN to Pascal.
The process adopted is not simply one of literally replacing
FORTRAN by Pascal. Rather, an attempt is made to introduce the
structured concepts of Pascal to the FORTRAN program. This involves
replacing FORTRAN loops by the Pascal statements repeat ... until or
while ... do, using the powerful Pascal if statement, and laying out
the COMMON and EQUIVALENCE statements so that the structure is
apparent. A clear, consistent layout procedure is adopted and the
program structure in the Pascal listing produced is highlighted.
FORTRAN subprograms are nested within the procedure which calls them,
or declared global to the set of procedures which call them - an
approach which eliminates the global subprogram declarations of
FORTRAN.