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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <stdlib.h>
  4. #include <sstream>
  5. #include <string>
  6. using namespace std;
  7.  
  8. long long gsd(long long a, long long b){
  9. while (a > 0 && b > 0) {
  10.     if (a > b) {
  11.       a %= b;
  12.     } else {
  13.       b %= a;
  14.     }
  15.  
  16.   }
  17.     return (a+b);
  18. }
  19.  
  20. class Rational {
  21. public:
  22.     Rational() {
  23.         numerator=0;
  24.         denominator=1;
  25.     }
  26.  
  27.     Rational(int n, int d) {
  28.         if (d==0)
  29.             throw invalid_argument("invalid_argument");
  30.         if (n==0){
  31.                 numerator=0;
  32.                 denominator=1;
  33.         }
  34.         else{
  35.             int p=gsd(abs(n), abs(d));
  36.             if (n*d<0){
  37.                 numerator=-1*abs(n)/p;
  38.                 denominator=abs(d)/p;
  39.             }
  40.             else{
  41.                numerator=abs(n)/p;
  42.                denominator=abs(d)/p;
  43.             }
  44.         }
  45.  
  46.     }
  47.  
  48.     long long Numerator() const {
  49.         return numerator; // Реализуйте этот метод
  50.     }
  51.  
  52.     long long Denominator() const {
  53.         return denominator; // Реализуйте этот метод
  54.     }
  55.  
  56. private:
  57.     int  numerator;
  58.     int  denominator; // Добавьте поля
  59. };
  60.     Rational DoRation(int h, int m){
  61.     return Rational(h,m);
  62.     }
  63. Rational operator+(const Rational& lhs, const Rational& rhs ){
  64.     return Rational(lhs.Numerator()*rhs.Denominator()+rhs.Numerator()*lhs.Denominator(), lhs.Denominator()*rhs.Denominator());
  65. }
  66. Rational operator-(const Rational& lhs, const Rational& rhs ){
  67.     return Rational(lhs.Numerator()*rhs.Denominator()-rhs.Numerator()*lhs.Denominator(), lhs.Denominator()*rhs.Denominator());
  68. }
  69. bool operator==(const Rational& lhs, const Rational& rhs ){
  70.     return (lhs.Numerator()==rhs.Numerator()&& lhs.Denominator()==rhs.Denominator());
  71. }
  72. Rational operator/(const Rational& lhs, const Rational& rhs ){
  73.     if (rhs.Numerator()==0) throw domain_error("domain_error");
  74.     Rational ac (lhs.Numerator(), rhs.Numerator()); //a/c
  75.     Rational db (rhs.Denominator(), lhs.Denominator()); //d/b //a*d/b*c
  76.     return Rational(ac.Numerator()*db.Numerator(), ac.Denominator()*db.Denominator());
  77. }
  78. Rational operator*(const Rational& lhs, const Rational& rhs ){
  79.     Rational ad (lhs.Numerator(), rhs.Denominator()); //a/d
  80.     Rational cb (rhs.Numerator(), lhs.Denominator()); //c/b //a*c/d*b
  81.     return Rational(ad.Numerator()*cb.Numerator(), ad.Denominator()*cb.Denominator());
  82. }
  83. bool operator<(const Rational& lhs, const Rational& rhs ){
  84.     return (lhs-rhs).Numerator()<0;
  85. }
  86. ostream& operator<<(ostream& stream, const Rational& rational) {
  87. stream << rational.Numerator() << '/'
  88. << rational.Denominator();
  89. return stream;
  90. }
  91. istream& operator>>(istream& stream, Rational& r) {
  92. char s;
  93.     int p, q;
  94.     if (stream >> p && stream>>s && s=='/' && stream >> q)
  95.         r = { p, q };
  96.     else throw invalid_argument("invalid_argument");
  97. return stream;
  98. }
  99. int main() {
  100.     Rational r1, r2;
  101.     char op;
  102.     try {
  103.         cin>>r1>>op>>r2;
  104.  
  105.     if (op=='+') cout<<r1+r2<<endl;
  106.     if (op=='-') cout<<r1-r2<<endl;
  107.     if (op=='*') cout<<r1*r2<<endl;
  108.     if (op=='/'){
  109.         try{ 
  110.             cout<<r1/r2;
  111.         } catch(domain_error&){
  112.             cout<<"Division by zero";
  113.         }
  114.     }
  115.     } catch (invalid_argument&) {
  116.         cout<<"Invalid argument";
  117.     }
  118.  
  119.     return 0;
  120. }
Success #stdin #stdout 0s 4488KB
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Division by zero
https://ideone.com/OY15B6
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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