一、练习题
1.取字串数组中最长的元素。
private static void Main(string[] args){string[] str = { "马龙", "迈克尔乔丹", "雷吉米勒", "蒂姆邓肯", "科比布莱恩特" };Console.WriteLine(GetSeri(str));Console.ReadKey();}public static string GetSeri(string[] str){int j = 0;for (int i = 0; i < str.Length; i++){if (str[i].Length > j){j = i;}}return str[j];}
2.取整数数组中的平均值，保留两位小数
private static void Main(string[] args){int[] intA = { 2, 3, 4, 5, 6, 7 };double avg = GetAvg(intA);Console.WriteLine("{0:0.00}", avg);//4.50Console.WriteLine(avg.ToString("0.00"));//4.50Console.WriteLine(Convert.ToDouble(avg.ToString("0.00")));//4.5Console.ReadKey();}public static double GetAvg(int[] intB){double sum = 0;//提升为doulbefor (int i = 0; i < intB.Length; i++){sum += intB[i];}return 1.00 * sum / intB.Length;}
3.方法A判断输入是否为质数，方法B要求只能输入数字，否则一直输入
private static void Main(string[] args){int num = GetNum();if (GetPrime(num)) { Console.WriteLine("是质数"); }else { Console.WriteLine("不是质数"); }Console.ReadKey();}public static int GetNum(){int a;while (true){Console.WriteLine("请输入一个正整数");try{a = Convert.ToInt32(Console.ReadLine());break;}catch{Console.WriteLine("不是数字，请重新输入！");}}return a;}public static bool GetPrime(int a){if (a <= 2) { return false; }else{for (int i = 2; i <= a / 2; i++){if (a % i == 0) { return false; }}return true;}}
4.输入分数，判断优良等级别
private static void Main(string[] args){while (true){try{Console.WriteLine("请输入分数(大于0)：");int num = Convert.ToInt32(Console.ReadLine());if (num >= 0){Console.WriteLine(GetLevel(num));break;}}catch{Console.WriteLine("不是数字请重输入!");}}Console.ReadKey();}public static string GetLevel(int score){switch (score / 10){case 10:case 9: return "优";case 8: return "良";case 7: return "中";case 6: return "差";default: return "不及格";}}
5.数组反转。注意参数不加ref也可传回到实参
private static void Main(string[] args){string[] str = { "中国", "美国", "巴西", "澳大利亚", "加拿大" };//str = str.Reverse().ToArray();//Array.Reverse(str);GetReverse(str);for (int i = 0; i < str.Length; i++){Console.WriteLine(str[i]);}Console.ReadKey();}public static void GetReverse(string[] str){//参数不加ref，对数组一样可以影响实参for (int i = 0; i < str.Length / 2; i++){string temp = str[i];str[i] = str[str.Length - 1 - i];str[str.Length - 1 - i] = temp;}}
6.返回圆的周长与面积。
private static void Main(string[] args){double r = 5, peri, area;area = GetParams(r, out peri);//若未定义也可out double periConsole.WriteLine("周长为{0},面积为{1}.", peri, area);Console.ReadKey();}public static double GetParams(double r, out double p){//out参数可前可后。p = 2 * 3.14 * r; return 3.14 * r * r;}
二、飞行棋
1.规则
蛇形地图，两人轮流掷骰，谁达终点即胜。
图例：幸运轮盘：◎ 地雷：☆ 暂停：△ 时空隧道：◆
游戏规则：
如果玩家A踩到玩家B，玩家B退6格
如果玩家踩中地雷。退6格
如果玩家踩进时空隧道，进10格
如果玩家踩到幸运轮盘， 1 交换位置，2 轰炸对方（使对方退6格）
如果玩家踩到了暂停，暂停一个回合
如果玩家踩到了方块，走到当前位置，什么都不发生
2、程序
internal class Program{// 普通□ 幸运轮盘：◎ 地雷：★ 暂停：▲ 时空隧道：卐public static int[] Maps = new int[100]; //地图public static int[] playerPos = new int[2]; //玩家坐标public static string[] playerNames = new string[2];//玩家namepublic static bool[] b = new bool[2];//暂停，0，1private static void Main(string[] args){GameStart();InitMap();DrawMap();InputPlayer();//输入玩家名字Console.Clear();InitMap();DrawMap();while (playerPos[0] < 99 && playerPos[1] < 99){if (b[0] == false) PlayGame(0);else b[0] = false;if (b[1] == false) PlayGame(1);else b[1] = false;}Win();Console.ReadKey();}public static void Win(){if (playerPos[0] >= 99){Console.WriteLine("玩家{0}取得了胜利！！", playerNames[0]);}else{Console.WriteLine("玩家{0}取得了胜利！！", playerNames[1]);}}public static void PlayGame(int n){Random r = new Random();int step = r.Next(1, 7);//[1,7)Console.WriteLine("玩家{0}按任意键开始掷骰子:", playerNames[n]);Console.ReadKey(true);//不显示按键激活Console.WriteLine(" 掷出了{0},准备前行{0}步", step);playerPos[n] += step;Console.ReadKey(true);if (playerPos[n] == playerPos[1 - n])//踩中另一玩家退6格{Console.WriteLine(" 玩家{0}被踩中退6格", playerNames[1 - n]);playerPos[1 - n] -= 6;}else//是否关卡{ChangePos();switch (Maps[playerPos[n]]){case 0:Console.WriteLine(" 玩家{0}踩到了方块，安全.", playerNames[n]);break;case 1:Console.WriteLine(" 玩家{0}踩到了轮盘，选择1--交换位置,2--轰炸对方退6格", playerNames[n]);string sel = Console.ReadLine();while (sel != "1" && sel != "2"){if (sel == "1"){Console.WriteLine(" 你选择了交换位置");int temp = playerPos[n];playerPos[n] = playerPos[1 - n];playerPos[1 - n] = temp;Console.WriteLine(" 位置交换完成.");}else if (sel == "2"){playerPos[1 - n] -= 6;Console.WriteLine(" 玩家{0}退6格完成.", playerNames[1 - n]);}else{Console.WriteLine(" 无效输入，请重新输入1--交换位置，2--轰炸对方退6格");sel = Console.ReadLine();}}break;case 2:Console.WriteLine(" 玩家{0}踩到了地雷退6格", playerNames[n]);playerPos[n] -= 6;break;case 3:Console.WriteLine(" 玩家{0}踩到了暂停，暂停一回合。", playerNames[n]);b[n] = true;break;case 4:Console.WriteLine(" 玩家{0}踩到了时空隧道，进10格", playerNames[n]);playerPos[n] += 10;break;}//switchChangePos();}//ifConsole.ReadKey(true);Console.Clear();DrawMap();}public static void ChangePos(){if (playerPos[0] < 0){playerPos[0] = 0;}else if (playerPos[0] > 99){playerPos[0] = 99;}if (playerPos[1] < 0){playerPos[1] = 0;}else if (playerPos[1] > 99){playerPos[1] = 99;}}public static void InputPlayer(){Console.WriteLine();do{Console.WriteLine("请输入玩家A的姓名（不能为空):");playerNames[0] = Console.ReadLine();} while (playerNames[0] == "");do{Console.WriteLine("请输入玩家B的姓名（不能为空或与玩家A相同):");playerNames[1] = Console.ReadLine();} while (playerNames[1] == "" || playerNames[0] == playerNames[1]);Console.WriteLine();Console.WriteLine("玩家A代表:{0}", playerNames[0]);Console.WriteLine("玩家B代表:{0}", playerNames[1]);}//输入玩家姓名public static void DrawMap(){Console.WriteLine("图例：幸运轮盘：◎ 地雷：★ 暂停：▲ 时空隧道：卐 ");#region 第一横行for (int i = 0; i <= 29; i++){Console.Write(DrawStringMap(i));}//forConsole.WriteLine();#endregion 第一横行#region 第一纵竖for (int i = 30; i <= 34; i++){for (int j = 0; j <= 28; j++){Console.Write(" ");}Console.WriteLine(DrawStringMap(i));}#endregion 第一纵竖#region 第二横行for (int i = 64; i >= 35; i--){Console.Write(DrawStringMap(i));}Console.WriteLine();#endregion 第二横行#region 第二纵竖for (int i = 65; i <= 69; i++){Console.WriteLine(DrawStringMap(i));}#endregion 第二纵竖#region 第三横行for (int i = 70; i < 100; i++){Console.Write(DrawStringMap(i));}Console.WriteLine();#endregion 第三横行}//刷新地图public static string DrawStringMap(int i){if (playerPos[0] == playerPos[1] && playerPos[1] == i)//位置重合{return "<>";}else if (playerPos[0] == i){return "Ａ";}else if (playerPos[1] == i){return "Ｂ";}else{switch (Maps[i]){case 0:return "□";case 1:return "◎";case 2:return "★";case 3:return "▲";default:return "卐";}//switch}//if}//位置字符public static void InitMap(){int[] luckyturn = { 6, 23, 40, 55, 69, 83 };for (int i = 0; i < luckyturn.Length; i++)//幸运轮盘：◎{Maps[luckyturn[i]] = 1;}int[] landMine = { 5, 13, 17, 33, 38, 50, 64, 80, 94 };//地雷：★for (int i = 0; i < landMine.Length; i++){Maps[landMine[i]] = 2;}int[] pause = { 9, 27, 60, 93 };//暂停：▲for (int i = 0; i < pause.Length; i++){Maps[pause[i]] = 3;}int[] timeTunnel = { 20, 25, 45, 63, 72, 88, 90 };//时空隧道：卐for (int i = 0; i < timeTunnel.Length; i++){Maps[timeTunnel[i]] = 4;}}//初始化地图public static void GameStart(){Console.Clear();Console.WriteLine("*************************");Console.WriteLine("*************************");Console.ForegroundColor = ConsoleColor.Red;Console.WriteLine("**********飞行棋*********");Console.ForegroundColor = ConsoleColor.White;Console.WriteLine("*************************");Console.WriteLine("*************************");}//游戏头}
