C++运算符重载实现有理数运算

C++运算符重载实现有理数运算

实现有理数的加减乘除
//1/8 + 7/8 = 1
//拆分成分子分母
//利用运算符重载实现有理数之间的运算

  1 #include <iostream>
  2 #include <stdlib.h>
  3 
  4 class RationalNumber
  5 {
  6 public:
  7     RationalNumber();
  8     RationalNumber(int x, int y);
  9     RationalNumber operator+(RationalNumber rhs);
 10     RationalNumber operator-(RationalNumber rhs);
 11     RationalNumber operator*(RationalNumber rhs);
 12     RationalNumber operator/(RationalNumber rhs);
 13     void print();
 14 private:
 15     int mole;
 16     int denom;
 17     void simplify();
 18 };
 19 
 20 RationalNumber::RationalNumber()
 21 {
 22     mole = 0;
 23     denom = 0;
 24     simplify();
 25 }
 26 
 27 RationalNumber::RationalNumber(int x, int y)
 28 {
 29     mole = x;
 30     denom = y;
 31     simplify();
 32 }
 33 
 34 void RationalNumber::simplify()
 35 {
 36     if (denom < 0)
 37     {
 38         denom = -denom;
 39         mole = -mole;
 40     }
 41     int x = abs(mole);
 42     int y = abs(denom);
 43 
 44     while (y > 0)
 45     {
 46         int t = x % y;
 47         x = y;
 48         y = t;
 49     }
 50     mole /= x;
 51     denom /= x;
 52 }
 53 
 54 RationalNumber RationalNumber::operator+(RationalNumber rhs)
 55 {
 56     return RationalNumber(mole * rhs.denom + denom * rhs.mole, denom*rhs.denom);
 57 }
 58 
 59 RationalNumber RationalNumber::operator-(RationalNumber rhs)
 60 {
 61     rhs.mole = -rhs.mole;
 62     return operator+(rhs);
 63 }
 64 
 65 RationalNumber RationalNumber::operator *(RationalNumber rhs)
 66 {
 67     return RationalNumber(mole * rhs.mole, denom * rhs.denom);
 68 }
 69 
 70 RationalNumber RationalNumber::operator/(RationalNumber rhs)
 71 {
 72     return RationalNumber(mole *rhs.denom, denom * rhs.mole);
 73 }
 74 
 75 void RationalNumber::print()
 76 {
 77     if(mole % denom == 0)
 78     {
 79         std::cout << mole / denom;
 80     }
 81     else
 82     {
 83         std::cout << mole << "/" << denom;
 84     }
 85 }
 86 
 87 int main ()
 88 {
 89     RationalNumber f1(1,12);
 90     RationalNumber f2(3,12);
 91     RationalNumber f3 = f1 + f2;
 92     f1.print();
 93     std::cout << " + ";
 94     f2.print() ;
 95     std::cout << " = ";
 96     f3.print();
 97     std::cout << std::endl;
 98 
 99     f3 = f1 - f2;
100     f1.print();
101     std::cout << " - ";
102     f2.print() ;
103     std::cout << " = ";
104     f3.print();
105     std::cout << std::endl;
106 
107     f3 = f1 * f2;
108     f1.print();
109     std::cout << " * ";
110     f2.print() ;
111     std::cout << " = ";
112     f3.print();
113     std::cout << std::endl;
114 
115     f3 = f1 / f2;
116     f1.print();
117     std::cout << " / ";
118     f2.print() ;
119     std::cout << " = ";
120     f3.print();
121     std::cout << std::endl;
122 
123     return 0;
124 }

结果