分数四则运算

秒速五厘米 2023-07-12 05:29 10阅读 0赞

#include<iostream>
    #include<cmath>
    using namespace std;
    
    class Rational
    { 
    private:
     int m;  //分母
     int n;  //分子
    public:
     Rational(int nn = 1, int mm = 1);
     bool setM(int);
     void setN(int);
     Rational R_add(const Rational&A);
     void R_sub(const Rational &A, const Rational &B);
     Rational R_mul(const Rational &A);
     void R_div(const Rational &A, const Rational &B);
     void simple();
     void print();
    };
    
    Rational::Rational(int nn, int mm)
    { 
     n = nn;
     m = mm;
    }
    
    bool Rational::setM(int mm)
    { 
     if (mm == 0)
      return false;
     else
      return true;
    }
    
    void Rational::setN(int nn)
    { 
     n = nn;
    }
    
     if (m == 0)
      cout << n << endl;
     else
      cout << n << "/" << m << endl;
    }
    
    void Rational::simple()
    { 
     int temp, a, b;
     a = m;
     b = n;
     while (b != 0)
     { 
      temp = a % b;
      a = b;
      b = temp;
     }
     m = m / a;
     n = n / a;
    }
    
    Rational Rational::R_add(const Rational&A) 
    { 
     Rational r3;
     r3.m = m * A.m;
     r3.n = n * A.m + m * A.n;
     return r3;
    }
    
    void Rational::R_sub(const Rational &A, const Rational &B)
    { 
     Rational r3;
     r3.m = A.m*B.m;
     r3.n = A.n*B.m - A.m*B.n;
     r3.simple();
     r3.print();
    }
    
    Rational Rational::R_mul(const Rational &A)
    { 
     Rational r3;
     r3.m = A.m * m;
     r3.n = A.n * n;
     return r3;
    }
    
    void Rational::R_div(const Rational &A, const Rational &B)
    { 
     Rational r3;
     if (B.n == 0)
      cout << "wrong number!" << endl;
     else
     { 
      r3.m = A.m*B.n;
      r3.n = A.n*B.m;
      r3.simple();
      r3.print();
     } 
    }
    
    int main()
    { 
     int m1, n1, m2, n2;
     cin >> n1 >> m1 >> n2 >> m2;
     Rational r1(n1, m1);
     Rational r2(n2, m2), r3;
     if (r1.setM(m1) == 0 || r2.setM(m2) == 0)
      cout << "wrong number!";
     else
     { 
      r3=r1.R_add(r2);
      r3.simple();
      r3.print();
      r3.R_sub(r1, r2);
      r3 = r1.R_mul(r2);
      r3.simple();
      r3.print();
      r3.R_div(r1, r2);
     }
     return 0;
    }