C#基础知识总结(七)

摘要

　　C#最简单的两个算法：输入数字打印出菱形星星、冒泡排序
1.输入数字打印出菱形星星

static void Main(string[] args)
{
    //输入一个数，表示菱形星号，数字必须是一个正奇数
    int number = ;
    do
    {
        Console.WriteLine("请输入一个正奇数：");
        try
        {
            number = Convert.ToInt32(Console.ReadLine());
        }
        catch
        {
            //Console.WriteLine("请输入一个正奇数：");
        }
    } while (number <=  || number %  == );

    for (int i = ; i < number; i++)
    {
        //下面两行计算星星个数是重点
        int starCount =  + ( i > number /  ? number - i -  : i ) * ;
        int emptyCount = ( number - starCount ) /;
        for (int j = ; j < emptyCount; j++)
        {
            Console.Write(" ");
        }
        for (int k = ; k < starCount; k++)
        {
            Console.Write("*");
        }
        Console.WriteLine("");
    }

    Console.ReadKey();
}

2.冒泡排序

int[] scores = {,,,};

for(int i= ; i < scores.Length -; i++)
{
    for(int j = ;j = scores.Length - i - ; j++)
    {
        if(scores[j] < scores[j+])
        {
            int temp = scores[j];
            scores[j] = scores[j+];
            scores[j+] = temp;
        }
    }
}