编写一个控制台应用程序，输出 1 到 5 的平方值，要求：

        public void test() {
            int num = 1;
            for (; num <= 5; num++) {
                Console.WriteLine("{0}的平方值为:{1}", num, num * num);
            }
            num = 1;
            while (num <= 5) {
                Console.WriteLine("{0}的平方值为:{1}", num, num * num);
                num++;
            }
            num = 1;
            do {
                Console.WriteLine("{0}的平方值为:{1}", num, num * num);
                num++;
            } while (num<=5);
        }

class Program
    {
        static void Main(string[] args)
        {
            //输出 1 到 5 的平方值
            Console.WriteLine("1.for");
            for(int i = 1; i <= 5; i++)
            {
                Console.Write(i * i + " ");
            }
            Console.WriteLine("\r\n2.while");
            int m = 1;
            while (m <= 5)
            {
                Console.Write(m * m + " ");
                m++;
            }
            Console.WriteLine("\r\n3.do while");
            int n = 1;
            do
            {
                Console.Write(n * n + " ");
                n++;
            } while (n<=5);
            Console.ReadKey();
        }
    }

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

namespace demo5
{
    class Program
    {
        static void Main(string[] args)
        {
            int num1 = 0;
            for (int i = 1; i < 6; i++)
            {
                num1 += i * i;
            }
            Console.WriteLine(num1);
            int num2 = 0;
            int j = 1;
            while(j < 6)
            {
                num2 += j * j;
                j++;
            }
            Console.WriteLine(num2);
            int num3 = 0;
            int k = 1;
            do
            {
                num3 += k * k;
                k++;
            } while (k < 6);
            Console.WriteLine(num3);
            Console.ReadKey();
        }
    }
}