A. 属性的使用
定义Rectangle类，类中的两个属性Length和Width（其对应的私有字段为length和width，默认值为均为1）。
Length属性的set方法中验证其值必须在0~20（开区间）之间的浮点数。如果不满足保持其默认值。
方法：
计算长方形的周长public double Perimeter()
计算长方形的面积public double Area()
输入长方形的长和宽的值，输出长方形的周长、面积。
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| using System;
namespace CSharp_Week4_A
{
class Rectangle
{
double length = 1;
double width = 1;
double Length
{
get { return length; }
set
{
if (value > 0 && value < 20)
length = value;
}
}
double Width
{
get { return width; }
set { width = value; }
}
public Rectangle() { }
public Rectangle(double l, double w)
{
Length = l;
Width = w;
}
public double Perimeter() { return 2 * (length + width); }
public double Area() { return length * width; }
}
static class InputConvert
{
public static double[] GetInputArray(char SplitOperator)
{
string[] instr = Console.ReadLine().Split(SplitOperator);
double[] invar = new double[instr.Length];
for (int i = 0; i < invar.Length; ++i)
invar[i] = Convert.ToDouble(instr[i]);
return invar;
}
}
class Program
{
static void Main(string[] args)
{
double[] lenwid = InputConvert.GetInputArray(' ');
Rectangle tim = new Rectangle(lenwid[0], lenwid[1]);
Console.WriteLine(tim.Perimeter());
Console.WriteLine(tim.Area());
}
}
}
|
B. 利用一维数组求解问题。
读入若干（1-15个）整数（一行输入，空格分隔），每个数在10-100之间的整数包括10和100。
在读入每个数时，确认这个数的有效性（在10到100之间），并且若它和之前读入的数不一样，就把它存储到数组中，无效的数不存储。
读完所有数之后，仅显示用户输入的不同的数值。
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| using System;
using System.Collections;
namespace CSharp_Week4_B
{
class NumberPile
{
static readonly int[] range = { 10, 100 };
readonly bool[] check = new bool[range[1] - range[0] + 1];
ArrayList save = new ArrayList();
public NumberPile()
{
for (int i = 0; i < check.Length; ++i)
check[i] = false;
}
public bool CheckIn(int x)
{
if (x < range[0] || x > range[1])
return false;
return check[x - range[0]];
}
public bool CheckChange(int x)
{
if (x < range[0] || x > range[1])
return false;
return check[x - range[0]] = true;
}
public void Push(params int[] xs)
{
foreach (int x in xs)
if (x >= range[0] && x <= range[1])
if (!CheckIn(x))
{
save.Add(x);
CheckChange(x);
}
}
public void Write() { Console.WriteLine(string.Join(" ", save.ToArray())); }
}
static class InputConvert
{
public static int[] GetInputArray(char SplitOperator)
{
string[] instr = Console.ReadLine().Split(SplitOperator);
int[] invar = new int[instr.Length];
for (int i = 0; i < invar.Length; ++i)
invar[i] = Convert.ToInt32(instr[i]);
return invar;
}
}
class Program
{
static void Main(string[] args)
{
NumberPile p = new NumberPile();
p.Push(InputConvert.GetInputArray(' '));
p.Write();
}
}
}
|
C. 成绩排序
创建一个学生类。
字段：学号（string类型）、成绩（用一个一维数组，存储一个学生的5门课成绩）
方法：将学生的5门课成绩由小到大顺序输出。
主函数中，声明3个学生对象，从控制台给每个学生的学号和5门课成绩赋值，调用方法输出。
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| using System;
namespace CSharp_Week4_C
{
class Student
{
string name;
const int subnum = 5;
int[] score = new int[subnum];
public Student()
{
name = "NoName";
for (int i = 0; i < subnum; ++i)
score[i] = 0;
}
public Student(params string[] info)
{
if (info == null)
return;
if (info.Length > 0)
name = info[0];
for (int i = 0; i < subnum; ++i)
if (info.Length > i + 1)
score[i] = Convert.ToInt32(info[i + 1]);
else
score[i] = 0;
}
public Student(string na, params int[] info)
{
name = na;
for (int i = 0; i < subnum; ++i)
if (info.Length > i)
score[i] = info[i];
else
score[i] = 0;
}
public void Sort() { Array.Sort(score); }
public void Write()
{
string[] info = new string[subnum + 1];
info[0] = name;
for (int i = 0; i < subnum; ++i)
info[i + 1] = Convert.ToString(score[i]);
Console.WriteLine(string.Join(" ", info));
}
}
class Program
{
static void Main(string[] args)
{
const int stunum = 3;
for (int i = 0; i < stunum; ++i)
{
Student stu = new Student(Console.ReadLine().Split(' '));
stu.Sort();
stu.Write();
}
}
}
}
|
D. 洗牌与发牌
参照课本第五章【案例研究】——模拟洗牌与发牌。
此题目涉及多种概念，请大家参照课本（或MOOC视频）完成代码编写。
【注：】提交后，编译通过即可。
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| using System;
using System.Text;
namespace CSharp_Week4_D
{
class Card
{
public int Number { get; private set; }
public int Suit { get; private set; }
public int Id { get; private set; }
static string[] suits = new string[] { "♠", "♥", "♣", "♦" };
static string NumberName(int x)
{
switch (x)
{
case 1: return "A";
case 11: return "J";
case 12: return "Q";
case 13: return "K";
default: return Convert.ToString(x);
}
}
public Card(int id)
{
Id = id;
Number = id / 4 + 1;
Suit = id % 4;
}
public Card(int num, int type)
{
Id = 4 * Number - 4 + Suit;
Number = num;
Suit = type;
}
public string GetSuitS() { return suits[Suit]; }
public string GetNumberS() { return NumberName(Number); }
public string GetName() { return GetSuitS() + GetNumberS(); }
public int CompareTo(Card b)
{
if (Id < b.Id)
return -1;
if (Id > b.Id)
return 1;
return 0;
}
}
class PokerPile
{
static int cardnum = 52;
Card[] pcards = new Card[cardnum];
public PokerPile()
{
for (int i = 0; i < cardnum; ++i)
pcards[i] = new Card(i);
}
void swap(ref Card a, ref Card b) { Card tmp = b; b = a; a = tmp; }
public void Shuffle(params int[] seed)
{
Random tool;
if (seed.Length == 0)
{
Console.WriteLine("随机洗牌中......");
tool = new Random();
}
else
{
Console.WriteLine("作弊洗牌中......");
string dinfo = string.Format("{0:X}", seed[0]);
while (dinfo.Length < 8)
dinfo = "0" + dinfo;
dinfo = "0x" + dinfo;
Console.WriteLine("种子为：{0}", dinfo);
tool = new Random(seed[0]);
}
for (int i = 0; i < cardnum; ++i)
swap(ref pcards[i], ref pcards[tool.Next(i, cardnum)]);
Console.WriteLine("洗牌完毕!");
}
public void Sort()
{
Console.WriteLine("恢复牌堆中......");
Array.Sort(pcards, (a, b) => a.CompareTo(b));
Console.WriteLine("恢复完毕!");
}
const int playernum = 4;
readonly static string[] defname = new string[] { "甲", "乙", "丙", "丁" };
readonly static string[] align = new string[] { "第", "", "张：", "", "\t\t" };
const int alignlen = 7;
int GetPreStr(string org)
{
int cnt = alignlen;
for (int i = 0; i < cnt && i < org.Length; ++i)
if (org[i] > 127)
--cnt;
return cnt;
}
public void HandOut(params string[] name)
{
Console.WriteLine("发牌中......");
string[] rname = new string[playernum];
for (int i = 0; i < playernum; ++i)
if (name.Length <= i || name[i].Length < 1)
rname[i] = defname[i];
else
{
int remLen = GetPreStr(name[i]);
if (remLen < name[i].Length)
rname[i] = name[i].Remove(remLen);
else
rname[i] = name[i];
}
for (int i = 0; i < playernum; ++i)
Console.Write("\t{0}\t\t", rname[i]);
for (int i = 0; i < cardnum; ++i)
{
if (i % playernum == 0)
Console.WriteLine();
string[] s = new string[align.Length];
Array.Copy(align, s, align.Length);
s[1] = Convert.ToString(i + 1);
while (s[1].Length < 2)
s[1] = " " + s[1];
s[3] = pcards[i].GetName();
Console.Write(string.Join("", s));
}
Console.WriteLine();
Console.WriteLine("发牌完毕!");
}
public void DoAsk()
{
while (true)
{
Console.Write(">> ");
string[] csla = Console.ReadLine().Split(' ');
if (csla.Length == 0)
continue;
switch (csla[0])
{
case "洗牌":
try { Shuffle(Convert.ToInt32(csla[1])); }
catch { Shuffle(); }
break;
case "恢复": Sort(); break;
case "发牌":
string[] aft = new string[csla.Length - 1];
Array.Copy(csla, 1, aft, 0, aft.Length);
HandOut(aft);
break;
case "结束": return;
default: Console.WriteLine("命令未找到！"); break;
}
}
}
}
class Program
{
static void Main(string[] args)
{
Console.OutputEncoding = new UTF8Encoding();
PokerPile p = new PokerPile();
p.Shuffle();
p.HandOut();
p.Sort();
p.Shuffle(0x01315878);
p.HandOut("徐忠锋", "乔亚男", "平田一郎");
p.Sort();
p.HandOut("Zeondik,,Sheauhaw".Split(','));
p.DoAsk();
}
}
}
|
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