test!=.cod

编译原理源码（包括语法分析

=== COMPILE PL0 ===
  0 PROGRAM TEST; 
  0 	VAR A,B,C; 
  1 	BEGIN 
  2   		A:=88; 
  4   		READ(B); 
  6   		IF A<>B	THEN 
  9   		BEGIN 
 10   			A-=2; 
 14   			WRITE(A);  
 17   		END 
 17 	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   9
  9  JPC   0  17
 10  LOD   0   3
 11  LIT   0   2
 12  OPR   0   3
 13  STO   0   3
 14  LOD   0   3
 15  OPR   0  14
 16  OPR   0  15
 17  OPR   0   0
----------------------------- RUN PL0 ----------------------------- 
? 36
86
------------------------- END PL0 -----------------------------