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Constant parameters are replaced by value parameters (in the sense of Algol 60).
The class structure is eliminated: pointer variables are bound to a data type instead of a class variable.
The handling of files is changed such that the buffer variable f↑ always has e defined value except when the condition eof(f) is true.
Packed records and packed arrays are introduced. As a consequence, the type alfa becomes a special case of a packed character array. The generalization has some consequences on the denotation of strings (formely called alfa constants).
Programs require a program heading with external files as parameters.
All labels require a declaration.
KeywordsActual Parameter Formal Parameter Scalar Type Type Definition Procedure Statement
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- N. Wirth, “Systematic Programming”, Prentice-Hall, Englewood Cliffs, 1973.Google Scholar