money

money

¿Has encontrado un error? ¿Tienes la solución? Deja tu correción ;-)

Antes de comentar: Gran parte de los ejercicios propuestos no tienen librerías debido a que Wordpress las eliminó al verlas como etiquetas HTML. Si sabes/tienes/conoces las librerías que hacen falta, déjalo en los comentarios. Y lo mas importante: Todos los ejemplos fueron realizados por estudiante con únicamente conocimiento básico del lenguaje, no de programación.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
unit money;
 
{$mode objfpc}{$H+}
 
interface 
uses
  Classes, SysUtils;
 
type 
  TMoney = class;
  TMoneyBag = class;
 
  IMoney = interface  ['{2E0160F6-312C-D911-8DE5-DD8AC3E7C6F4}']
  function add(m: IMoney): IMoney;
  function addMoney(m: TMoney): IMoney;
  function addMoneyBag(mb: TMoneyBag): IMoney;
  function isZero: boolean;  function multiply(factor: integer): IMoney;
  function negate: IMoney;
  function subtract(m: IMoney): IMoney;
  procedure appendTo(m: TMoneyBag);
  function toString: String;  function equals(m: IMoney): boolean;
  function Count: integer;
  function _Self: TObject;
  end;
   ISingleCurrencyMoney = interface(IMoney)
  ['{D6D97717-E52D-D911-83C4-8233402A6B6C}']
  function GetCurrencyUnit: string;
  function GetAmount: int64;
  property Amount: int64 read GetAmount;  property CurrencyUnit: string read GetCurrencyUnit;
  end;
 
  TMoney = class(TInterfacedObject, IMoney, ISingleCurrencyMoney)
  private    FAmount: int64;
    FCurrencyUnit: String;
    function GetAmount: int64;
    function GetCurrencyUnit: string;
  public    constructor Create(aAmount: int64; aCurrencyUnit: String);
    function add(m: IMoney): IMoney;
    function addMoney(m: TMoney): IMoney;
    function addMoneyBag(mb: TMoneyBag): IMoney;
    function isZero: Boolean;    function multiply(factor: Integer): IMoney;
    function negate: IMoney;
    function subtract(m: IMoney): IMoney;
    procedure appendTo(m: TMoneyBag);
    function toString: String;    function equals(m: IMoney): boolean;
    property Amount: int64 read GetAmount;
    property CurrencyUnit: string read GetCurrencyUnit;
    function Count: integer;
    function _Self: TObject;  end;
 
  TMoneyBag = class(TInterfacedObject, IMoney)
  private
    FMonies: TFPList;    function AddToMoniesList(const Item: IInterface): Integer;
    function RemoveFromMoniesList(const Item: IInterface): Integer;
    function FindMoney(aCurrencyUnit: string): ISingleCurrencyMoney;
    function Contains(m: ISingleCurrencyMoney): boolean;
  public    constructor Create;
    class function CreateWith(m1: IMoney; m2: IMoney): IMoney;
    destructor Destroy; override;
    function Simplify: IMoney;
    function add(m: IMoney): IMoney;    function addMoney(m: TMoney): IMoney;
    function addMoneyBag(mb: TMoneyBag): IMoney;
    procedure appendBag(aBag: TMoneyBag);
    procedure appendMoney(aMoney: ISingleCurrencyMoney);
    function isZero: boolean;    function multiply(factor: integer): IMoney;
    function negate: IMoney;
    function subtract(m: IMoney): IMoney;
    procedure appendTo(m: TMoneyBag);
    function toString: String;    function equals(m: IMoney): boolean;
    function Count: integer;
    function _Self: TObject;
  end;
   Operator + (c: IMoney; c1: IMoney) c2: IMoney;
  Operator - (c: IMoney; c1: IMoney) c2: IMoney;
  Operator * (c: IMoney; i: integer) c2: IMoney;
 
 implementation 
Operator + (c: IMoney; c1: IMoney) c2: IMoney;
begin
  c2 := c.add(c1);
end; 
Operator - (c: IMoney; c1: IMoney) c2: IMoney;
begin
  c2 := c.subtract(c1);
end; 
Operator * (c: IMoney; i: integer) c2: IMoney;
begin
  c2 := c.multiply(i);
end; 
function TMoneyBag.AddToMoniesList(const Item: IInterface): Integer;
begin
  Result := FMonies.Add(nil);
  IInterface(FMonies.List^[Result]) := Item;end;
 
function TMoneyBag.RemoveFromMoniesList(const Item: IInterface): Integer;
begin
  Result := FMonies.IndexOf(Pointer(Item));  if Result > -1 then
  begin
    IInterface(FMonies.List^[Result]) := nil;
    FMonies.Delete(Result);
  end;end;
 
function TMoneyBag.FindMoney(aCurrencyUnit: string): ISingleCurrencyMoney;
var
  i: Integer;begin
  for i := 0 to FMonies.Count - 1 do
    if ISingleCurrencyMoney(FMonies.items[i]).CurrencyUnit = aCurrencyUnit then
    begin
      Result := ISingleCurrencyMoney(FMonies.items[i]);      Exit;
    end;
end;
 
function TMoneyBag.Contains(m: ISingleCurrencyMoney): boolean;var
  found: ISingleCurrencyMoney;
begin
  found := FindMoney(m.CurrencyUnit);
  if found = nil then  begin
    Result := false;
    Exit;
  end;
  Result := (found.Amount = m.amount);end;
 
class function TMoneyBag.CreateWith(m1: IMoney; m2: IMoney): IMoney;
var
  mb: IMoney;begin
  mb := TMoneyBag.Create;
  m1.AppendTo(TMoneyBag(mb._Self));
  m2.AppendTo(TMoneyBag(mb._Self));
  Result := TMoneyBag(mb._Self).Simplify;end;
 
constructor TMoneyBag.Create;
begin
  FMonies := TFPList.Create;end;
 
destructor TMoneyBag.Destroy;
var
  i: integer;begin
  for i := 0 to FMonies.Count - 1 do
    IInterface(FMonies.items[i])._release;
  FMonies.Free;
  inherited Destroy;end;
 
function TMoneyBag.Simplify: IMoney;
begin
  if FMonies.Count = 1 then    Result := IMoney(FMonies.items[0])
  else
    Result := Self;
end;
 function TMoneyBag.add(m: IMoney): IMoney;
begin
  Result := m.AddMoneyBag(Self);
end;
 function TMoneyBag.addMoney(m: TMoney): IMoney;
begin
  Result := TMoneyBag.CreateWith(m, Self);
end;
 function TMoneyBag.addMoneyBag(mb: TMoneyBag): IMoney;
begin
  Result := TMoneyBag.CreateWith(mb, Self);
end;
 procedure TMoneyBag.appendBag(aBag: TMoneyBag);
var
  i: integer;
begin
  for i := 0 to aBag.FMonies.Count - 1 do    appendMoney(ISingleCurrencyMoney(aBag.FMonies.Items[i]));
end;
 
procedure TMoneyBag.appendMoney(aMoney: ISingleCurrencyMoney);
var  old: IMoney;
  sum: IMoney;
begin
  if aMoney.isZero then Exit;
  old := findMoney(aMoney.CurrencyUnit);  if old = nil then
  begin
    AddToMoniesList(aMoney);
    Exit;
  end;  sum := old.Add(aMoney);
  RemoveFromMoniesList(old);
  if sum.isZero then Exit;
  AddToMoniesList(sum);
end; 
function TMoneyBag.isZero: boolean;
begin
  Result := FMonies.Count = 0;
end; 
function TMoneyBag.multiply(factor: integer): IMoney;
var
  i: Integer;
begin  Result := TMoneyBag.Create;
  if factor <> 0 then
    for i := 0 to FMonies.Count - 1 do
    begin
      TMoneyBag(Result._Self).appendMoney(ISingleCurrencyMoney(      ISingleCurrencyMoney(FMonies.items[i]).Multiply(factor)));
    end;
end;
 
function TMoneyBag.negate: IMoney;var
  i: integer;
begin
  Result := TMoneyBag.Create;
  for i := 0 to FMonies.Count - 1 do  begin
    TMoneyBag(Result._Self).appendMoney(ISingleCurrencyMoney(
      ISingleCurrencyMoney(FMonies.items[i]).negate));
  end;
end; 
function TMoneyBag.subtract(m: IMoney): IMoney;
begin
  Result := Add(m.negate);
end; 
procedure TMoneyBag.appendTo(m: TMoneyBag);
begin
  m.AppendBag(Self);
end; 
function TMoneyBag.toString: String;
var
  i: integer;
begin  Result := '{';
  for i := 0 to FMonies.Count - 1 do
    Result := Result + ISingleCurrencyMoney(FMonies.items[i]).ToString;
  Result := Result + '}';
end; 
function TMoneyBag.equals(m: IMoney): boolean;
var
  aMoneyBag: TMoneyBag;
  i: integer;  ism: ISingleCurrencyMoney;
begin
  if m = nil then
  begin
    Result := false;    Exit;
  end;
  if isZero then
  begin
    Result := m.isZero;    Exit;
  end;
  if m._Self.ClassType = TMoneyBag then
  begin
    aMoneyBag := TMoneyBag(m._Self);    if aMoneyBag.FMonies.count <> FMonies.Count then
    begin
      Result := false;
      Exit;
    end;    for i := 0 to FMonies.Count - 1 do
    begin
      ism := ISingleCurrencyMoney(FMonies.items[i]);
      if not aMoneyBag.Contains(ism) then
      begin        Result := false;
        Exit;
      end;
    end;
    Result := true;    Exit;
  end;
  Result := false;
end;
 function TMoneyBag.Count: integer;
begin
  Result := FMonies.Count;
end;
 function TMoneyBag._Self: TObject;
begin
  Result := Self;
end;
  
{ TMoney }
 
function TMoney.GetCurrencyUnit: string;
begin  Result := FCurrencyUnit;
end;
 
function TMoney.GetAmount: int64;
begin  Result := FAmount;
end;
 
constructor TMoney.Create(aAmount: int64; aCurrencyUnit: string);
begin  FAmount := aAmount;
  FCurrencyUnit := aCurrencyUnit;
end;
 
function TMoney.add(m: IMoney): IMoney;begin
  Result := m.AddMoney(Self);
end;
 
function TMoney.addMoney(m: TMoney): IMoney;begin
  if (m.CurrencyUnit = Self.CurrencyUnit) then
    Result := TMoney.Create(Self.Amount + m.Amount, Self.CurrencyUnit)
  else
    Result := TMoneyBag.CreateWith(Self, M);end;
 
function TMoney.addMoneyBag(mb: TMoneyBag): IMoney;
begin
  Result := mb.AddMoney(Self);end;
 
function TMoney.isZero: Boolean;
begin
  Result := Amount = 0;end;
 
function TMoney.multiply(factor: Integer): IMoney;
begin
  Result := TMoney.Create(Amount * factor, CurrencyUnit);end;
 
function TMoney.negate: IMoney;
begin
  Result := TMoney.Create(- Amount, CurrencyUnit);end;
 
function TMoney.subtract(m: IMoney): IMoney;
begin
  Result := Add(m.negate);end;
 
procedure TMoney.appendTo(m: TMoneyBag);
begin
  m.AppendMoney(Self);end;
 
function TMoney.toString: String;
begin
  Result := '[' + IntToStr(FAmount) + ' '+ FCurrencyUnit + ']';end;
 
function TMoney.equals(m: IMoney): boolean;
var
  ism: ISingleCurrencyMoney;begin
  if Assigned(m) then
  begin
    if isZero then
         Result := m.isZero;    if m._Self.ClassType = TMoney  then
    begin
      ism := ISingleCurrencyMoney(m);
       Result := (ism.Amount = Amount) and
          (ism.CurrencyUnit = CurrencyUnit)    end
    else
      Result := false;
  end
  else    Result := false;
end;
 
function TMoney.Count: integer;
begin  Result := 1;
end;
 
function TMoney._Self: TObject;
begin  Result := Self;
end;
 
end.

Punto importante: Si vas a sugerir un segmento de código en algún lenguaje debes hacerlo así:

  • Si es lenguaje C <code lang="c">Código en C</code>
  • Si es lenguaje Pascal <code lang="pascal">Aquí dentro el código de Pascal</code>.

De esta manera el código coloreas el código.

Deja un comentario

Suscribirse a los comentarios.