e010.cod

PL0功能的扩充编译原理课程设计：扩充赋值运算：+= 和-=

=== COMPILE PL0 ===
  0 PROGRAM EX01; 
  0   VAR A,B,C:INT; 
  1        
  1  
  1 BEGIN 
  2   A:=1; 
  4   B:=2; 
  6   C:=9;  
  8   C--; 
 12   C++; 
 16   A:=C++; 
 24   B:=C*(++B)-(B--);  
 40   WRITE(B); 
 43  
 43 END. 
  0  JMP   0   1
  1  INI   0   6
  2  LIT   0   1
  3  STO   0   3
  4  LIT   0   2
  5  STO   0   4
  6  LIT   0   9
  7  STO   0   5
  8  LOD   0   5
  9  LIT   0   1
 10  OPR   0   3
 11  STO   0   5
 12  LOD   0   5
 13  LIT   0   1
 14  OPR   0   2
 15  STO   0   5
 16  LOD   0   5
 17  LIT   0   1
 18  OPR   0   2
 19  STO   0   5
 20  LOD   0   5
 21  LIT   0   1
 22  OPR   0   3
 23  STO   0   3
 24  LOD   0   5
 25  LOD   0   4
 26  LIT   0   1
 27  OPR   0   2
 28  STO   0   4
 29  LOD   0   4
 30  OPR   0   4
 31  LOD   0   4
 32  LIT   0   1
 33  OPR   0   3
 34  STO   0   4
 35  LOD   0   4
 36  LIT   0   1
 37  OPR   0   2
 38  OPR   0   3
 39  STO   0   4
 40  LOD   0   4
 41  OPR   0  14
 42  OPR   0  15
 43  OPR   0   0
~~~ RUN PL0 ~~~
27
~~~ END PL0 ~~~