| 摘要 |
PURPOSE:To extend easily the sentence interpreting function by interpreting an extended sentence in a source program by means of one of N pieces of interpretation executing means connected sequentially to each other. CONSTITUTION:A sentence of a user program is extracted by a dispatcher routine of a basic interpreter. If this sentence shows an instruction and an extension interpreter flag of the sentence itself is kept on, the instruction dispatcher routine of the 2nd extended interpreter is called to a subroutine. This called routine calls the instruction dispatcher routine of the next 1st extended interpreter to a subroutine. This called routine processes the instruction in the corresponding instruction procedure when the routine decides that its own extension interpreter flag is off and the instruction should be processed by itself.
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