C#教程之C#-练习题

1、输入两个数，将两个数交换后输出

using System;

namespace ExchangeTwoNumbers
{
    class ExchangeTwoNumbers
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter two integers and end with the enter key");
            Console.Write("Please input a：");
            int a = Convert.ToInt32(Console.ReadLine());
            Console.Write("Please input b：");
            int b = Convert.ToInt32(Console.ReadLine());

            a = a - b;
            b = a + b;
            a = b - a;

            Console.WriteLine("a is：{0}", a);
            Console.WriteLine("b is：{0}", b);
            Console.ReadKey();
        }
    }
}

结果