e01.cod

编译原理源码（包括语法分析

=== COMPILE PL0 ===
  0 PROGRAM  EX01; 
  0 VAR A,B,C; 
  1 BEGIN 
  2   A:=88; 
  4   READ(B); 
  6   C:=A+B; 
 10   IF A<>B THEN 
 13   	BEGIN 
 14   		WRITE(A); 
 17   	END 
 17   ELSE 
 18   	BEGIN 
 18   		WRITE(C); 
 21   	END; 
 21 END. 
  0  JMP   0   1
  1  INI   0   6
  2  LIT   0  88
  3  STO   0   3
  4  OPR   0  16
  5  STO   0   4
  6  LOD   0   3
  7  LOD   0   4
  8  OPR   0   2
  9  STO   0   5
 10  LOD   0   3
 11  LOD   0   4
 12  OPR   0   9
 13  JPC   0  18
 14  LOD   0   3
 15  OPR   0  14
 16  OPR   0  15
 17  JMP   0  21
 18  LOD   0   5
 19  OPR   0  14
 20  OPR   0  15
 21  OPR   0   0
----------------------------- RUN PL0 ----------------------------- 
? 0
88
------------------------- END PL0 -----------------------------