| 摘要 |
PURPOSE:To enable the presence or absence of the nesting terminating sentences to be judged by checking the corresponding level numbers that are read when the control sentences are read, as these level numbers correspond to the sequence of the control sentences present themselves. CONSTITUTION:In a nesting constitution of the control sentence analysis loop, the frame data to be analyzed is performed by routine modules of 1-3. In each routine module, before analysis of the control sentence, the appearance or presentation sequence of previously given sentence level is read from a prescribed table in response to reading of control sentences. Since the sentence level number corresponds to the presentation sequence of the control sentences, the reasonableness of the presentation sequence can be known by checking the presentation number. In such a manner, the nesting terminating sentence can be judged, the error occurrence as from the terminating sentence can be prevented from occurring by suitable processing, while generation of redundant error messages can be prevented. |
