Description: PL/0 language grammar rules (1) the original PL/0 compiler was amended as follows : 1 'increase in the importation and fi ff paper, the output document fw2. 2 'a reserved word read and write, make reservations number to 13 characters. 3 'relations Operators of gt; =, Lt; = And lt; Gt; Getsym changed in the process described. 4 'in the process interpret added to the read and write operations. (2) pre-establish PL/0 ff language source files and the data they need fi document (document were pre-determined). (3) running at the keyboard on the basis of a message typing output files fw2 document (identify themselves at any time).
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