C#练习题VS2019

以下是一个C#练习题的例子，你可以在VS2019中尝试编写和运行它：

using System;

namespace Exercise
{
    class Program
    {
        static void Main(string[] args)
        {
            // 填空题
            int num1 = 10;
            int num2 = 20;
            int sum = num1 + num2;
            Console.WriteLine("The sum is: " + sum);

            // 选择题
            int x = 5;
            int y = 10;
            int z = 15;
            int result = (x > y) ? ((x > z) ? x : z) : ((y > z) ? y : z);
            Console.WriteLine("The largest number is: " + result);

            // 判断题
            int a = 5;
            int b = 10;
            bool isGreater = (a > b);
            Console.WriteLine("Is a greater than b? " + isGreater);

            // 编程题
            int[] numbers = { 1, 2, 3, 4, 5 };
            int sumOfNumbers = 0;
            foreach (int number in numbers)
            {
                sumOfNumbers += number;
            }
            Console.WriteLine("The sum of numbers is: " + sumOfNumbers);
        }
    }
}

这个例子包含了填空题、选择题、判断题和编程题。你可以在VS2019中创建一个新的C#控制台应用程序项目，将上述代码复制到`Program.cs`文件中，并运行该程序来查看结果。