using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;//引用命名空间

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
           //类型转换
            int number_1= 100;
            double number_2 = number_1;//自动类型转换(隐式类型转换)
            Console.WriteLine(number_2);
            double number_3 = 3.14;
            int number_4 = (int)number_3;//强制类型转换
            Console.WriteLine(number_4);
            //10/3保留两位小数
            double d = (10 * 1.0) / 3;
            Console.WriteLine("{0:0.00}",d);//0.00保留两位,0.000保留三位...
            Console.ReadKey();
        }
    }
}