写4个同名方法，实现两个整数、两个实数，一个实数一个整数，一个整数一个实数之间的求和。在主调函数中调用这4个方法计算相关的值。（方法的重载）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication7
{
    class Program
    {
        static void Main(string[] args)
        {
            //整数相加
            int a = 1;
            int b = 3;
            int sum = Test(a, b);
            Console.WriteLine("整数相加:{0}+{1}={2}", a, b, sum);
            Console.WriteLine();
            //实数相加
            double c = 2.5;
            double d = 5.2;
            double sum1 = Test(c, d);
            Console.WriteLine("实数数相加:{0}+{1}={2}", c, d, sum1);
            Console.WriteLine();
            //实数加整数
            double e = 3.5;
            int f = 6;
            double sum2 = Test(e, f);
            Console.WriteLine("实数加整数:{0}+{1}={2}", e, f, sum2);
            Console.WriteLine();
            //整数加实数
            int g = 8;
            double h = 9.9;
            double sum3 = Test(g, h);
            Console.WriteLine("整数加实数:{0}+{1}={2}", g, h, sum3);
            Console.WriteLine();

            Console.ReadKey();
        }

        static int Test(int a, int b)
        {
            int sum = a + b;
            return sum;
        }
        static double Test(double a, double b)
        {
            double sum = a + b;
            return sum;
        }
        static double Test(double a, int b)
        {
            double sum = a + b;
            return sum;
        }
        static double Test(int a, double b)
        {
            double sum = a + b;
            return sum;
        }
    }
}