一个简单的问题~~~~~~~~~ >.<

Question

方法的返回类型可以是一个类吗?
如何实现~~~~~~~~~~
我在写时,提示错误~~~~~~~~~~~

Answer 1

namespace _0._2_有理数四则运算
{
    public class rationalnumber
    {
        public int numerator;
        public int denominator;
        public rationalnumber()
        {
            Console.WriteLine("输入分子：");
            numerator=Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("输入分母：");
            denominator=Convert.ToInt32(Console.ReadLine());
            if(numerator>denominator)
            {
                denominator+=numerator/denominator;
                numerator%=denominator;
            }
        }
    }
    public class ranumberoperation
    {
        public ranumberoperation()
        {
        }
        public rationalnumber addition(rationalnumber a, rationalnumber b)
        {
            rationalnumber c = new rationalnumber();
            c.numerator = a.numerator + b.numerator;
        }
    class Program
    {
        static void Main(string[] args)
        {
        }
    }
}

Answer 2

using System;namespace my
{
    public class rationalnumber
    {
        public int numerator;
        public int denominator;
        public rationalnumber()
        {
            Console.WriteLine("输入分子：");
            numerator = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("输入分母：");
            denominator = Convert.ToInt32(Console.ReadLine());
            if (numerator > denominator)
            {
                denominator += numerator / denominator;
                numerator %= denominator;
            }
        }
    }
    public class ranumberoperation
    {
        public ranumberoperation()
        {
        }        public rationalnumber addition(rationalnumber a, rationalnumber b)
        {
            rationalnumber c = new rationalnumber();
            c.numerator = a.numerator + b.numerator;            return c;
        }
        static void Main(string[] args)
        {
        }    }
}

Answer 3

你的这个方法没有return 语句
public rationalnumber addition(rationalnumber a, rationalnumber b)
{
rationalnumber c = new rationalnumber();
c.numerator = a.numerator + b.numerator;
}

Answer 4

可以啊，比如string就是一个类。