プログラミング学習の記録 272.1 "初めてのC# 第2版"の第10章(配列)の10.9(練習問題)

開発環境

• Microsoft Windows 7 Home Premium (OS)
• Microsoft Visual C# 2010 Express Edition (IDE)
• 言語: C#

"初めてのC# 第2版"のp.170, 第10章(配列)の10.9(練習問題)、練習 10-1, 2, 3, 4を解いてみる。

練習 10-1

using System; public class Dog { private int weight; private string name; public Dog(int weight, string name) { this.weight = weight; this.name = name; } public int Weight { get { return weight; } set { weight = value; } } public string Name { get { return name; } set { name = value; } } public class Tester { public void Run() { Dog milo = new Dog(26, "Milo"); Dog frisky = new Dog(10, "Frisky"); Dog laika = new Dog(50, "Laika"); Dog[] dogArray = { milo, frisky, laika }; foreach (Dog dog in dogArray) { Console.WriteLine( "Name: {0}, Weight: {1}p", dog.name, dog.weight); } } static void Main() { Tester test = new Tester(); test.Run(); } } }

 

練習 10-2

using System; class Tester { public void Run() { int[] intArray = new int[10]; Console.WriteLine( "これから画面の指示に従って整数を10個入力してください"); for (int i = 0; i < intArray.Length; i++) { Console.Write("整数を入力してください({0}個目)>>",i+1); string str = Console.ReadLine(); intArray[i] = Convert.ToInt32(str); } // 昇順にソート Array.Sort(intArray); // 降順にソート Array.Reverse(intArray); Console.WriteLine( "入力された10個の整数を最大値から順に最小値まで出力"); foreach (int n in intArray) { Console.WriteLine(n); } } static void Main() { Tester test = new Tester(); test.Run(); } }

 

10-3

using System; public class Dog { private int weight; private string name; public Dog(int weight, string name) { this.weight = weight; this.name = name; } public int Weight { get { return weight; } set { weight = value; } } public string Name { get { return name; } set { name = value; } } public class Tester { public void Run() { Dog milo = new Dog(26, "Milo"); Dog frisky = new Dog(10, "Frisky"); Dog laika = new Dog(50, "Laika"); Dog[] dogArray = { milo, frisky, laika }; string[][] dogAwards = new string[3][]; dogAwards[0] = new string[1]; dogAwards[1] = new string[3]; dogAwards[2] = new string[2]; dogAwards[0][0] = "Award1"; dogAwards[1][0] = "Award2"; dogAwards[1][1] = "Award3"; dogAwards[1][2] = "Award4"; dogAwards[2][0] = "Award5"; dogAwards[2][1] = "Award6"; for (int i = 0; i < dogArray.Length; i++) { Console.WriteLine( "Name: {0}, Weight: {1}p", dogArray[i].name, dogArray[i].weight); Console.Write("Awards: "); for (int j = 0; j < dogAwards[i].Length; j++) { Console.Write("{0} ", dogAwards[i][j]); } Console.WriteLine("\n"); } } static void Main() { Tester test = new Tester(); test.Run(); } } }

 

10-4

ChessboardはWikipediaのチェス、チェスのルール(概略)を参照(a, b, c...を1列目、2列目、3列目...と変更)

using System; public class Tester { public void Run() { const int rows = 8; const int columns = 8; string[,] chessboard = new string[rows, columns]; for (int i = 0; i < rows; i++) { if ((i % 2) == 0) { for (int j = 0; j < columns; j++) { if ((j % 2) == 0) { chessboard[i, j] = "黒"; } else { chessboard[i, j] = "白"; } } } else { for (int j = 0; j < columns; j++) { if ((j % 2) == 0) { chessboard[i, j] = "白"; } else { chessboard[i, j] = "黒"; } } } } Console.Write("何行目かを入力してください(1～8)>>"); string row = Console.ReadLine(); int m = Convert.ToInt32(row); Console.Write("何列目かを入力してください(1～8)>>"); string column = Console.ReadLine(); int n = Convert.ToInt32(column); Console.WriteLine("Chessboardの{0}行目、{1}列目は{2}です", m, n, chessboard[m - 1, n - 1]); } static void Main() { Tester test = new Tester(); test.Run(); } }