你怎么能添加两个分数？

Question

如何在c#中添加两个分数,如下所示:

11/6 + 3/4 = 31/12

然后你会如何简化答案？

Answer 1

由于周五晚上的无聊打击......导致Fraction类超载运算符.清醒的设计无法保证.

它像这样工作......

Fraction left = "1/2";
Fraction right = "3/8";

Fraction result1 = ((left + right) * left / right).Simplify();
Console.WriteLine(result1);

Fraction test2 = "12/32";
test2 = test2.Simplify();
Console.WriteLine(test2);

实现如下所示......

public struct Fraction
{
    public int Numerator { get; set; }
    public int Denominator { get; set; }

    public Fraction(int numerator, int denominator)
        : this()
    {
        Numerator = numerator;
        Denominator = denominator;
    }

    public Fraction Simplify()
    {
        int gcd = GCD();
        return new Fraction(Numerator / gcd, Denominator / gcd);
    }

    public Fraction InTermsOf(Fraction other)
    {
        return Denominator == other.Denominator ? this :
            new Fraction(Numerator * other.Denominator, Denominator * other.Denominator);
    }

    public int GCD()
    {
        int a = Numerator;
        int b = Denominator;
        while (b != 0)
        {
            int t = b;
            b = a % b;
            a = t;
        }
        return a;
    }

    public Fraction Reciprocal()
    {
        return new Fraction(Denominator, Numerator);
    }


    public static Fraction operator +(Fraction left, Fraction right)
    {
        var left2 = left.InTermsOf(right);
        var right2 = right.InTermsOf(left);

        return new Fraction(left2.Numerator + right2.Numerator, left2.Denominator);
    }

    public static Fraction operator -(Fraction left, Fraction right)
    {
        var left2 = left.InTermsOf(right);
        var right2 = right.InTermsOf(left);

        return new Fraction(left2.Numerator - right2.Numerator, left2.Denominator);
    }

    public static Fraction operator *(Fraction left, Fraction right)
    {
        return new Fraction(left.Numerator * right.Numerator, left.Denominator * right.Denominator);
    }

    public static Fraction operator /(Fraction left, Fraction right)
    {
        return new Fraction(left.Numerator * right.Denominator, left.Denominator * right.Numerator);
    }

    public static implicit operator Fraction(string value)
    {
        var tokens = value.Split('/');
        int num;
        int den;
        if (tokens.Length == 1 && int.TryParse(tokens[0], out num))
        {
            return new Fraction(num, 1);
        }
        else if (tokens.Length == 2 && int.TryParse(tokens[0], out num) && int.TryParse(tokens[1], out den))
        {
            return new Fraction(num, den);
        }
        throw new Exception("Invalid fraction format");
    }

    public override string ToString()
    {
        return string.Format("{0}/{1}", Numerator, Denominator);
    }
}