test-=.cod

编译原理源码（包括语法分析

=== COMPILE PL0 ===
  0 PROGRAM TEST; 
  0 	VAR A; 
  1 	BEGIN 
  2 		A:=9; 
  4 		A-=4; 
  8 		WRITE( A ); 
 11 	END. 
  0  JMP   0   1
  1  INI   0   4
  2  LIT   0   9
  3  STO   0   3
  4  LOD   0   3
  5  LIT   0   4
  6  OPR   0   3
  7  STO   0   3
  8  LOD   0   3
  9  OPR   0  14
 10  OPR   0  15
 11  OPR   0   0
----------------------------- RUN PL0 ----------------------------- 
5
------------------------- END PL0 -----------------------------