Exercise14_02.cpp - #include #include ...

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#include <iostream> #include <string> using namespace std; class Rational { public: Rational(); Rational(long numerator, long denominator); long getNumerator() const; long getDenominator() const; Rational add(const Rational& secondRational) const; Rational subtract(const Rational& secondRational) const; Rational multiply(const Rational& secondRational) const; Rational divide(const Rational& secondRational) const; int compareTo(const Rational& secondRational) const; bool equals(const Rational& secondRational) const; int intValue() const; double doubleValue() const; string toString() const; private: long r[2]; static long gcd(long n, long d); }; Rational::Rational() { r[0] = 0; r[1] = 1; } Rational::Rational(long numerator, long denominator) { long factor = gcd(numerator, denominator); r[0] = ((denominator > 0) ? 1 : -1) * numerator / factor; r[1] = abs(denominator) / factor; } long Rational::getNumerator() const { return r[0]; } long Rational::getDenominator() const { return r[1]; } /** Find GCD of two numbers */ long Rational::gcd(long n, long d) { long n1 = abs(n); long n2 = abs(d); int gcd = 1; for (int k = 1; k <= n1 && k <= n2; k++) { if (n1 % k == 0 && n2 % k == 0) gcd = k; } return gcd; }
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