e012.cod

PL/0语言是Pascal语言的一个子集

=== COMPILE PL0 ===
  0 PROGRAM EX011; 
  0 VAR A,B,C; 
  1 BEGIN 
  2   A:=88; 
  4   READ(B); 
  6   C:=A-B; 
 10   A--; 
 14   IF B<>0 THEN 
 17   C-=A+B 
 21   ELSE 
 24   C:=A*B; 
 29   WRITE(A) 
 31 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   3
  9  STO   0   5
 10  LOD   0   3
 11  LIT   0   1
 12  OPR   0   3
 13  STO   0   3
 14  LOD   0   4
 15  LIT   0   0
 16  OPR   0   9
 17  JPC   0  25
 18  LOD   0   5
 19  LOD   0   3
 20  LOD   0   4
 21  OPR   0   2
 22  OPR   0   3
 23  STO   0   5
 24  JMP   0  29
 25  LOD   0   3
 26  LOD   0   4
 27  OPR   0   4
 28  STO   0   5
 29  LOD   0   3
 30  OPR   0  14
 31  OPR   0  15
 32  OPR   0   0
~~~ RUN PL0 ~~~
? 0
87
~~~ END PL0 ~~~