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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. class Number;       
  6. class Integer;
  7. class Rational;
  8.  
  9. class Number
  10. {
  11. public:
  12.     int num, den;
  13.     virtual void add(Number&) = 0;
  14.     virtual void addInteger(Integer&) = 0;
  15.     virtual void addRational(Rational&) = 0;
  16.     virtual string toString() = 0;
  17. };
  18.  
  19. class Rational : public Number
  20. {
  21.     void addInteger(Integer& i);
  22.  
  23.     void addRational(Rational &r);
  24.  
  25. public:
  26.     void add(Number& n)
  27.     {
  28.         n.addRational(*this);
  29.     }
  30.  
  31.     Rational(int n, int d)
  32.     {
  33.         this->num = n;
  34.         this->den = d;
  35.     }
  36. };
  37.  
  38. class Integer : public Number
  39. {
  40.     void addInteger(Integer& i);
  41.  
  42.     void addRational(Rational& r);
  43.  
  44. public:
  45.     void add(Number& n)
  46.     {
  47.         n.addInteger(*this);
  48.     }
  49.  
  50.     Integer(int n)
  51.     {
  52.         this->num = n;
  53.         this->den = 1;
  54.     }
  55. };
  56.  
  57. void Rational::addInteger(Integer& i)
  58. {
  59.     this->num = this->num + i.num*this->den;
  60.     this->den = this->den;
  61.     cout << this->num << "/" << this->den;
  62. }
  63.  
  64. void Rational::addRational(Rational &r)
  65. {
  66. 	this->num = this->num*r.den + this->den*r.num;
  67. 	this->den = this->den*r.den;
  68. 	cout << this->num << "/" << this->den; 
  69. }
  70.  
  71. void Integer::addInteger(Integer& i)
  72. {
  73.     this->num += i.num;
  74.     this->den = 1;
  75.     cout << this->num;
  76. }
  77.  
  78. void Integer::addRational(Rational& r)
  79. {
  80.     this->num = this->num*r.den + r.num;
  81.     this->den = r.den;
  82.     cout << "this->num" << "/" << this->den;
  83. }
  84.  
  85. int main()
  86. {
  87.     cout << "Helo World";
  88.     return 0;
  89. }
Success #stdin #stdout 0s 3456KB
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Standard input is empty
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Helo World
https://ideone.com/Mb974d
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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