debug.txt

c++语言编写的PL0语言的语法分析程序

|      |      |      |      |      >-statement()  
|      |      |      |      |      <-getsym ();  
|      |      |      |      |      |      end 10 
|      |      |      |      |      |      sym= 21 
|      |      |      |      |      >-getsym ();  
|      |      |      |      |      <-test();  
|      |      |      |      |      >-test();  
|      |      |      |      >-statement()  
|      |      |      |      <-getsym ();  
|      |      |      |      |      begin  
|      |      |      |      |      sym= 17 
|      |      |      |      >-getsym ();  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      >-statement()  
|      |      |      <-getsym ();  
|      |      |      |      	read(b);  
|      |      |      |      begin 12 
|      |      |      |      sym= 20 
|      |      |      >-getsym ();  
|      |      |      <-gen();  
|      |      |      |      OPR 0 0
|      |      |      >-gen();  
|      |      >-block();  
|      |      <-gen();  
|      |      |      INT 0 5
|      |      >-gen();  
|      |      <-statement()  
|      |      |      <-test();  
|      |      |      >-test();  
|      |      |      <-getsym ();  
|      |      |      |      read 12 
|      |      |      |      sym= 31 
|      |      |      >-getsym ();  
|      |      |      <-statement()  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      sym= 14 
|      |      |      |      >-getsym ();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      b 12 
|      |      |      |      |      sym= 1 
|      |      |      |      >-getsym ();  
|      |      |      |      <-position();  
|      |      |      |      >-position();  
|      |      |      |      <-gen();  
|      |      |      |      |      OPR 0 16
|      |      |      |      >-gen();  
|      |      |      |      <-gen();  
|      |      |      |      |      STO 0 3
|      |      |      |      >-gen();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      sym= 15 
|      |      |      |      >-getsym ();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      	call p;  
|      |      |      |      |      sym= 17 
|      |      |      |      >-getsym ();  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      >-statement()  
|      |      |      <-getsym ();  
|      |      |      |      call 13 
|      |      |      |      sym= 26 
|      |      |      >-getsym ();  
|      |      |      <-statement()  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      p 13 
|      |      |      |      |      sym= 1 
|      |      |      |      >-getsym ();  
|      |      |      |      <-position();  
|      |      |      |      >-position();  
|      |      |      |      <-gen();  
|      |      |      |      |      CAL 0 2
|      |      |      |      >-gen();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      if a>b then  
|      |      |      |      |      sym= 17 
|      |      |      |      >-getsym ();  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      >-statement()  
|      |      |      <-getsym ();  
|      |      |      |      if 14 
|      |      |      |      sym= 22 
|      |      |      >-getsym ();  
|      |      |      <-statement()  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      a 14 
|      |      |      |      |      sym= 1 
|      |      |      |      >-getsym ();  
|      |      |      |      <-condition();  
|      |      |      |      |      <-test();  
|      |      |      |      |      >-test();  
|      |      |      |      |      <-expression();  
|      |      |      |      |      |      <-test();  
|      |      |      |      |      |      >-test();  
|      |      |      |      |      |      <-term();  
|      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      |      <-factor();  
|      |      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      |      |      <-position();  
|      |      |      |      |      |      |      |      >-position();  
|      |      |      |      |      |      |      |      <-gen();  
|      |      |      |      |      |      |      |      |      LIT 0 10
|      |      |      |      |      |      |      |      >-gen();  
|      |      |      |      |      |      |      |      <-getsym ();  
|      |      |      |      |      |      |      |      |      sym= 12 
|      |      |      |      |      |      |      |      >-getsym ();  
|      |      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      |      >-factor();  
|      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      >-term();  
|      |      |      |      |      |      <-test();  
|      |      |      |      |      |      >-test();  
|      |      |      |      |      >-expression();  
|      |      |      |      |      <-getsym ();  
|      |      |      |      |      |      b 14 
|      |      |      |      |      |      sym= 1 
|      |      |      |      |      >-getsym ();  
|      |      |      |      |      <-expression();  
|      |      |      |      |      |      <-test();  
|      |      |      |      |      |      >-test();  
|      |      |      |      |      |      <-term();  
|      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      |      <-factor();  
|      |      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      |      |      <-position();  
|      |      |      |      |      |      |      |      >-position();  
|      |      |      |      |      |      |      |      <-gen();  
|      |      |      |      |      |      |      |      |      LOD 0 3
|      |      |      |      |      |      |      |      >-gen();  
|      |      |      |      |      |      |      |      <-getsym ();  
|      |      |      |      |      |      |      |      |      	write(b);  
|      |      |      |      |      |      |      |      |      then 15 
|      |      |      |      |      |      |      |      |      sym= 23 
|      |      |      |      |      |      |      |      >-getsym ();  
|      |      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      |      >-factor();  
|      |      |      |      |      |      |      <-test();  
|      |      |      |      |      |      |      >-test();  
|      |      |      |      |      |      >-term();  
|      |      |      |      |      |      <-test();  
|      |      |      |      |      |      >-test();  
|      |      |      |      |      >-expression();  
|      |      |      |      |      <-gen();  
|      |      |      |      |      |      OPR 0 12
|      |      |      |      |      >-gen();  
|      |      |      |      |      <-test();  
|      |      |      |      |      >-test();  
|      |      |      |      >-condition();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      write 15 
|      |      |      |      |      sym= 30 
|      |      |      |      >-getsym ();  
|      |      |      |      <-gen();  
|      |      |      |      |      JPC 0 0
|      |      |      |      >-gen();  
|      |      |      |      <-statement()  
|      |      |      |      |      <-test();  
|      |      |      |      |      >-test();  
|      |      |      |      |      <-getsym ();  
|      |      |      |      |      |      sym= 14 
|      |      |      |      |      >-getsym ();  
|      |      |      |      |      <-getsym ();  
|      |      |      |      |      |      b 15 
|      |      |      |      |      |      sym= 1 
|      |      |      |      |      >-getsym ();  
|      |      |      |      |      <-position();  
|      |      |      |      |      >-position();  
|      |      |      |      |      <-gen();  
|      |      |      |      |      |      LOD 0 3
|      |      |      |      |      >-gen();  
|      |      |      |      |      <-gen();  
|      |      |      |      |      |      OPR 0 14
|      |      |      |      |      >-gen();  
|      |      |      |      |      <-gen();  
|      |      |      |      |      |      OPR 0 15
|      |      |      |      |      >-gen();  
|      |      |      |      |      <-getsym ();  
|      |      |      |      |      |      sym= 15 
|      |      |      |      |      >-getsym ();  
|      |      |      |      |      <-getsym ();  
|      |      |      |      |      |               write(c)  
|      |      |      |      |      |      sym= 17 
|      |      |      |      |      >-getsym ();  
|      |      |      |      |      <-test();  
|      |      |      |      |      >-test();  
|      |      |      |      >-statement()  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      >-statement()  
|      |      |      <-getsym ();  
|      |      |      |      write 16 
|      |      |      |      sym= 30 
|      |      |      >-getsym ();  
|      |      |      <-statement()  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      sym= 14 
|      |      |      |      >-getsym ();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      c 16 
|      |      |      |      |      sym= 1 
|      |      |      |      >-getsym ();  
|      |      |      |      <-position();  
|      |      |      |      >-position();  
|      |      |      |      <-gen();  
|      |      |      |      |      LOD 0 4
|      |      |      |      >-gen();  
|      |      |      |      <-gen();  
|      |      |      |      |      OPR 0 14
|      |      |      |      >-gen();  
|      |      |      |      <-gen();  
|      |      |      |      |      OPR 0 15
|      |      |      |      >-gen();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      end.  
|      |      |      |      |      sym= 15 
|      |      |      |      >-getsym ();  
|      |      |      |      <-getsym ();  
|      |      |      |      |      end 17 
|      |      |      |      |      sym= 21 
|      |      |      |      >-getsym ();  
|      |      |      |      <-test();  
|      |      |      |      >-test();  
|      |      |      >-statement()  
|      |      |      <-getsym ();  
|      |      |      |      sym= 18 
|      |      |      >-getsym ();  
|      |      >-statement()  
|      |      <-gen();  
|      |      |      OPR 0 0
|      |      >-gen();  
|      >-block();  
|      <-listCode();  
|      |      JMP 0 14
|      |      JMP 0 2
|      |      INT 0 3
|      |      LOD 1 3
|      |      LIT 0 10
|      |      OPR 0 2
|      |      STO 1 4
|      |      LOD 1 4
|      |      LIT 0 10
|      |      OPR 0 2
|      |      STO 1 3
|      |      OPR 0 16
|      |      STO 1 4
|      |      OPR 0 0
|      |      INT 0 5
|      |      OPR 0 16
|      |      STO 0 3
|      |      CAL 0 2
|      |      LIT 0 10
|      |      LOD 0 3
|      |      OPR 0 12
|      |      JPC 0 25
|      |      LOD 0 3
|      |      OPR 0 14
|      |      OPR 0 15
|      |      LOD 0 4
|      |      OPR 0 14
|      |      OPR 0 15
|      |      OPR 0 0
|      >-listCode();  
|      <-interpret();  
|      |      Start PL/0.