81 lines
1.4 KiB
C#
81 lines
1.4 KiB
C#
using System;
|
|
namespace Lesson
|
|
{
|
|
class Program
|
|
{
|
|
#region 练习题一 课上有不写了
|
|
#endregion
|
|
|
|
|
|
|
|
#region 练习题二
|
|
static int JieCheng(int max)
|
|
{
|
|
if (max == 0)
|
|
{
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
return max * JieCheng(max - 1);
|
|
}
|
|
|
|
}
|
|
|
|
#endregion
|
|
|
|
|
|
|
|
#region 练习题三
|
|
static int JieChengHe(int num)
|
|
{
|
|
if (num == 1)
|
|
{
|
|
return JieCheng(1);
|
|
}
|
|
return JieCheng(num) + JieChengHe(num-1);
|
|
}
|
|
#endregion
|
|
|
|
|
|
|
|
#region 练习题四
|
|
static void Bamboo(float length, int day)
|
|
{
|
|
Console.WriteLine("长度为" + length);
|
|
length /= 2;
|
|
day--;
|
|
if (day < 0)
|
|
{
|
|
Console.WriteLine("长度为" + length);
|
|
return;
|
|
}
|
|
Bamboo(length, day);
|
|
}
|
|
#endregion
|
|
|
|
|
|
#region 练习题五
|
|
static bool Fun(int num)
|
|
{
|
|
Console.WriteLine(num);
|
|
return num == 200 || Fun(num + 1);
|
|
}
|
|
#endregion
|
|
|
|
|
|
|
|
|
|
static void Main(string[] args)
|
|
{
|
|
Console.WriteLine(JieCheng(5));
|
|
|
|
Console.WriteLine(JieChengHe(10));
|
|
|
|
Bamboo(100,10);
|
|
|
|
Fun(0);
|
|
}
|
|
}
|
|
}
|