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:=10; 
  4   		READ(B); 
  6   		C:=B*4+A;	 
 12   		WRITE(C); 
 15   		C += A ; 
 19   		WRITE(C); 
 22 	END.  
  0  JMP   0   1
  1  INI   0   6
  2  LIT   0  10
  3  STO   0   3
  4  OPR   0  16
  5  STO   0   4
  6  LOD   0   4
  7  LIT   0   4
  8  OPR   0   4
  9  LOD   0   3
 10  OPR   0   2
 11  STO   0   5
 12  LOD   0   5
 13  OPR   0  14
 14  OPR   0  15
 15  LOD   0   5
 16  LOD   0   3
 17  OPR   0   2
 18  STO   0   5
 19  LOD   0   5
 20  OPR   0  14
 21  OPR   0  15
 22  OPR   0   0
----------------------------- RUN PL0 ----------------------------- 
? 6
34
44
------------------------- END PL0 -----------------------------