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一、问题描述

井深30米，蜗牛在井底，每天爬3米又滑下1米，问第几天爬出来

二、C#控制台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;namespace ConsoleApplication4
{class Program{static void Main(string[] args){// 以*横向模拟爬的过程ClimbDisplay(30, 3, 1);// 参数分别为：井高度，向上爬的高度，向下掉的高度ClimbDay(30, 3, 1);Console.ReadKey();}/// <summary>/// 计算蜗牛爬出井的天数/// </summary>/// <param name="height">井的高度</param>/// <param name="up">向上爬的高度</param>/// <param name="down">向下掉的高度</param>/// <returns></returns>public static void ClimbDay(int height, int up, int down){int day = 0;int upCount = 0;int downCount = 0;int count = 0; // 蜗牛实际米数while (true){// 向上爬count = count + up;upCount = upCount + up;// 下掉以后计算天数day++;// 向上爬后计算蜗牛高度是否超过井的高度if (count > height){break;}// 向下掉count = count - down;downCount = downCount + down;}Console.WriteLine("蜗牛第" + day.ToString() + "天就爬出了这口井");Console.WriteLine("蜗牛向上爬的总米数:"+ upCount);Console.WriteLine("蜗牛向下掉的总米数:" + downCount);}public static void ClimbDisplay(int height, int up, int down){// 定一个List放爬行轨迹数据List<int> listClimbPoint = new List<int>();int count = 0; // 蜗牛实际米数while (true){// 向上爬count = count + up;// 添加向上爬点数listClimbPoint.Add(up);// 向上爬后计算蜗牛高度是否超过井的高度if (count > height){break;}// 向下掉count = count - down;// 添加向下掉点数listClimbPoint.Add(-down);}string climbPrint = ""; //用来打印的字符串for (int i = 0; i < listClimbPoint.Count; i++){if (listClimbPoint[i] > 0){for (int j = 0; j < listClimbPoint[i]; j++){climbPrint = climbPrint + "*" + " ";Console.WriteLine(climbPrint);if (climbPrint.Length > height * 2){break;}Thread.Sleep(300);Console.Clear();}}else if (listClimbPoint[i] < 0){for (int j = 0; j < -listClimbPoint[i]; j++) // 取相反数{climbPrint = climbPrint.Substring(0, climbPrint.Length - 2); ;Console.WriteLine(climbPrint);if (climbPrint.Length > height * 2){break;}Thread.Sleep(300);Console.Clear();}}}Console.WriteLine("蜗牛已经爬出");}}
}