ex-17-01

Programming Csharp Source Code(代码) Programming Csharp Source Code

// Example 17-01: The Fraction class

namespace ProgCS
{
    using System;

    public class Fraction 
    {
        public Fraction(int numerator, int denominator)
        {
            this.numerator = numerator;
            this.denominator = denominator;
        }

        public Fraction Add(Fraction rhs)
        {
            if (rhs.denominator != this.denominator)
            {
                throw new ArgumentException(
                   "Denominators must match");
            }

            return new Fraction(
                this.numerator + rhs.numerator, 
                     this.denominator);
        }

        public override string ToString()
        {
            return numerator + "/" + denominator;
        }
        
        private int numerator;
        private int denominator;
    }
}