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