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  1. {$mode Delphi}
  2.  
  3. type PolynomBuilder = class
  4. 	private
  5. 		polynom : string;
  6. 		procedure Append( member : integer );
  7. 		procedure Append( multiplicant : integer; variable : string ); overload;
  8.  
  9. 	public
  10. 		function Get:string;
  11.  
  12. 	end;
  13.  
  14.  
  15. procedure PolynomBuilder.Append( member : integer );
  16. var memberStr : string;
  17. begin
  18. 	if 
  19. 		member <> 0 
  20. 	then begin
  21. 		str( member, memberStr );
  22. 		if 
  23. 			polynom = ''
  24. 		then
  25. 			polynom := memberStr
  26. 		else begin
  27. 			if 
  28. 				member < 0
  29. 			then
  30.     			polynom := polynom + memberStr
  31.     		else
  32. 				polynom := polynom + '+' + memberStr;
  33.   		end;
  34.   	end;
  35. end;
  36.  
  37. procedure PolynomBuilder.Append( multiplicant : integer; variable : string ); overload;
  38. var multiplicantStr, member : string;
  39. begin
  40. 	if 
  41. 		multiplicant <> 0 
  42. 	then begin
  43. 		if 
  44. 			abs(multiplicant) <> 1 
  45. 		then 
  46. 			str( multiplicant, multiplicantStr )
  47. 		else if 
  48. 				multiplicant = -1
  49. 			then
  50. 				multiplicantStr := '-';
  51.  
  52. 		member := multiplicantStr + variable;
  53. 		if 
  54. 			polynom = ''
  55. 		then
  56. 			polynom := member
  57. 		else begin
  58. 			if 
  59. 				multiplicant < 0
  60. 			then
  61.     			polynom := polynom + member
  62.     		else
  63. 				polynom := polynom + '+' + member;
  64.   		end;
  65.   	end;
  66. end;
  67.  
  68. function PolynomBuilder.Get : string;
  69. begin
  70.   Get := polynom;
  71. end;
  72.  
  73. var Polynom : PolynomBuilder;
  74.     a, b, c, i: integer;
  75. begin
  76. 	for i:=1 to 5 do begin
  77. 		Polynom := PolynomBuilder.Create;
  78. 		readln(a, b, c);
  79. 		Polynom.Append(a);
  80. 		Polynom.Append(b, 'x');
  81. 		Polynom.Append(c, 'y');
  82. 		writeln( Polynom.Get );
  83. 		Polynom.Free;
  84. 	end;
  85. end.
Success #stdin #stdout 0s 236KB
comments (?)
stdin
copy 
1 0 1
-1 -1 0
1 2 3
3 2 1
0 -1 1
stdout
copy 
1+y
-1-x
1+2x+3y
3+2x+y
-x+y
https://ideone.com/6R7D1x
language:
Pascal (fpc 3.0.4)
created:
10 years ago
visibility:
public

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