example.out

来自「pl0修改后的源程序和报告 （1） 修改后的PL/0语言文本。包含词法分析（正」· OUT 代码 · 共 191 行

    0  const m = 7, n = 85;
    1  var x, y, z, q, r;
    1  
    1  procedure multiply;
    1  var a, b;
    2  	procedure plus;
    2  	var ss;
    3  		procedure plusplus;
    3  		var s;
    4  		begin
    5  			s := x
    6  		end;

    4 INT	0	4
    5 LOD	3	3
    6 STO	0	3
    7 OPR	0	0

    8  	begin
    9  		ss :=x
   10  	end;

    8 INT	0	4
    9 LOD	2	3
   10 STO	0	3
   11 OPR	0	0

   12  
   12  begin
   13  	a := x; b := y; z := 0;
   19  	while b > 0 do
   23  	begin
   23  		if odd b then z := z + a;
   30  		a := 2 * a; b := b / 2;
   38  	end
   38  end;

   12 INT	0	5
   13 LOD	1	3
   14 STO	0	3
   15 LOD	1	4
   16 STO	0	4
   17 LIT	0	0
   18 STO	1	5
   19 LOD	0	4
   20 LIT	0	0
   21 OPR	0	11
   22 JPC	0	39
   23 LOD	0	4
   24 OPR	0	6
   25 JPC	0	30
   26 LOD	1	5
   27 LOD	0	3
   28 OPR	0	2
   29 STO	1	5
   30 LIT	0	2
   31 LOD	0	3
   32 OPR	0	4
   33 STO	0	3
   34 LOD	0	4
   35 LIT	0	2
   36 OPR	0	5
   37 STO	0	4
   38 JMP	0	19
   39 OPR	0	0

   40  
   40  procedure divide;
   40  var w;
   41  begin
   42  	r := x; q := 0; w := y;
   48  	while w > y do
   52  	begin
   52  		q := 2 * q; w := w / 2;
   60  		if w <= r then
   63  		begin
   64  			r := r - w;
   68  			q := q + 1;
   72  		end;
   72  	end
   72  end;

   41 INT	0	4
   42 LOD	1	3
   43 STO	1	7
   44 LIT	0	0
   45 STO	1	6
   46 LOD	1	4
   47 STO	0	3
   48 LOD	0	3
   49 LOD	1	4
   50 OPR	0	11
   51 JPC	0	73
   52 LIT	0	2
   53 LOD	1	6
   54 OPR	0	4
   55 STO	1	6
   56 LOD	0	3
   57 LIT	0	2
   58 OPR	0	5
   59 STO	0	3
   60 LOD	0	3
   61 LOD	1	7
   62 OPR	0	10
   63 JPC	0	72
   64 LOD	1	7
   65 LOD	0	3
   66 OPR	0	3
   67 STO	1	7
   68 LOD	1	6
   69 LIT	0	1
   70 OPR	0	2
   71 STO	1	6
   72 JMP	0	48
   73 OPR	0	0

   74  
   74  procedure gcd;
   74  var f, g;
   75  begin
   76  	f := x;
   78  	g := y;
   80  	while f <> g do
   84  	begin
   84  		if f < g then g := g - f;
   92  		if g < f then f := f - g;
  100  	end
  100  end;

   75 INT	0	5
   76 LOD	1	3
   77 STO	0	3
   78 LOD	1	4
   79 STO	0	4
   80 LOD	0	3
   81 LOD	0	4
   82 OPR	0	8
   83 JPC	0	101
   84 LOD	0	3
   85 LOD	0	4
   86 OPR	0	9
   87 JPC	0	92
   88 LOD	0	4
   89 LOD	0	3
   90 OPR	0	3
   91 STO	0	4
   92 LOD	0	4
   93 LOD	0	3
   94 OPR	0	9
   95 JPC	0	100
   96 LOD	0	3
   97 LOD	0	4
   98 OPR	0	3
   99 STO	0	3
  100 JMP	0	80
  101 OPR	0	0

  102  
  102  begin
  103  	x := m; y := n; call plus;
 ^
Error  11: Undeclared identifier.
  107  	x := n; y := m; call plusplus;
 ^
Error  11: Undeclared identifier.
  111  	x := 25; y := 3; call divide;
  116  	x := 34; y := 36; call gcd;
  121  end.

  102 INT	0	8
  103 LIT	0	7
  104 STO	0	3
  105 LIT	0	85
  106 STO	0	4
  107 LIT	0	85
  108 STO	0	3
  109 LIT	0	7
  110 STO	0	4
  111 LIT	0	25
  112 STO	0	3
  113 LIT	0	3
  114 STO	0	4
  115 CAL	0	41
  116 LIT	0	34
  117 STO	0	3
  118 LIT	0	36
  119 STO	0	4
  120 CAL	0	75
  121 OPR	0	0

  122