Merge pull request #291 from ikesnowy/Dev-2.1

2.1 Completed

Author: ikesnowy

1 Fundamental/1.1/1.1.10/Program.cs

@@ -13,7 +13,12 @@ static void Main(string[] args)
             int[] a;
             for (int i = 0; i < 10; i++)
             {
-                a[i] = i * i; // 不允许使用未赋值的局部变量
+                // a[i] = i * i; // 不允许使用未赋值的局部变量
+            }
+            a = new int[10];
+            for (int i = 0; i < 10; i++)
+            {
+                 a[i] = i * i; // 初始化后可用
             }
         }
     }

1 Fundamental/1.1/1.1.14/Program.cs

@@ -24,7 +24,7 @@ static int lg(int N)
             int pow = 1;
             int sum = 2;
 
-            for (pow = 1; sum < N; ++pow)
+            for (pow = 1; sum < N; pow++)
             {
                 sum *= baseNumber;
             }

1 Fundamental/1.1/1.1.15/Program.cs

@@ -19,7 +19,7 @@ static void Main(string[] args)
         {
             int[] a = new int[10];
             int M = 10;
-            for (int i = 0; i < 10; ++i)
+            for (int i = 0; i < 10; i++)
             {
                 a[i] = i;
             }
@@ -34,13 +34,13 @@ static int[] Histogram(int[] a, int M)
         {
             int[] result = new int[M];
 
-            for (int i = 0; i < M; ++i)
+            for (int i = 0; i < M; i++)
             {
                 // 初始化
                 result[i] = 0;
 
                 // 遍历数组，计算数组中值为 i 的元素个数
-                for (int j = 0; j < a.Length; ++j)
+                for (int j = 0; j < a.Length; j++)
                 {
                     if (a[j] == i) // 值为 i 的元素
                     {

1 Fundamental/1.1/1.1.19/Fibnacci.cs

@@ -41,7 +41,7 @@ static void Main(string[] args)
              * 
              */
             Stopwatch timer = Stopwatch.StartNew();
-            for (int N = 0; N < 100; ++N)
+            for (int N = 0; N < 100; N++)
             {
                 // 书本中的代码，非常慢，1小时后 N = 50
                 // Console.WriteLine($"{N} {F(N)}");

1 Fundamental/1.1/1.1.21/Program.cs

@@ -32,11 +32,11 @@ static void Main(string[] args)
             int[,] array = new int[rows, columns];      // 输入的两个整数
             double[] results = new double[rows];        // 计算结果
 
-            for (int i = 0; i < rows; ++i)
+            for (int i = 0; i < rows; i++)
             {
                 string temp = Console.ReadLine();
                 names[i] = temp.Split(' ')[0];
-                for (int j = 0; j < columns; ++j)
+                for (int j = 0; j < columns; j++)
                 {
                     array[i, j] = int.Parse(temp.Split(' ')[j + 1]);
                 }

1 Fundamental/1.1/1.1.22/BinarySearch.cs

@@ -42,7 +42,7 @@ public static int rank(int key, int[] a)
         public  static int rank(int key, int[] a, int lo, int hi, int number)
         {
 
-            for (int i = 0; i < number; ++i)
+            for (int i = 0; i < number; i++)
             {
                 Console.Write(" ");
             }

1 Fundamental/1.1/1.1.23/Program.cs

@@ -18,7 +18,7 @@ static void Main(string[] args)
             string[] whiteList = File.ReadAllLines("largeW.txt");
             int[] WhiteList = new int[whiteList.Length];
 
-            for (int i = 0; i < whiteList.Length; ++i)
+            for (int i = 0; i < whiteList.Length; i++)
             {
                 WhiteList[i] = int.Parse(whiteList[i]);
             }
@@ -29,7 +29,7 @@ static void Main(string[] args)
             // 输入样例：5 824524 478510 387221
             string input = Console.ReadLine();
             int[] Query = new int[input.Split(' ').Length];
-            for (int i = 0; i < Query.Length; ++i)
+            for (int i = 0; i < Query.Length; i++)
             {
                 Query[i] = int.Parse(input.Split(' ')[i]);
             }

1 Fundamental/1.1/1.1.28/BinarySearch.cs

@@ -22,7 +22,7 @@ static void Main(string[] args)
             h.CopyTo(whiteList);
             int[] WhiteList = new int[whiteList.Length];
 
-            for (int i = 0; i < whiteList.Length; ++i)
+            for (int i = 0; i < whiteList.Length; i++)
             {
                 WhiteList[i] = int.Parse(whiteList[i]);
             }
@@ -33,7 +33,7 @@ static void Main(string[] args)
             // 输入样例：5 824524 478510 387221
             string input = Console.ReadLine();
             int[] Query = new int[input.Split(' ').Length];
-            for (int i = 0; i < Query.Length; ++i)
+            for (int i = 0; i < Query.Length; i++)
             {
                 Query[i] = int.Parse(input.Split(' ')[i]);
             }

1 Fundamental/1.1/1.1.29/BinarySearch.cs

@@ -26,7 +26,7 @@ static void Main(string[] args)
             Console.WriteLine("Type the numbers you want to query: ");
             string input = Console.ReadLine();
             int[] Query = new int[input.Split(' ').Length];
-            for (int i = 0; i < Query.Length; ++i)
+            for (int i = 0; i < Query.Length; i++)
             {
                 Query[i] = int.Parse(input.Split(' ')[i]);
             }

1 Fundamental/1.1/1.1.30/Program.cs

@@ -19,9 +19,9 @@ static void Main(string[] args)
 
             bool[,] a = new bool[N, N];
 
-            for (int i = 0; i < N; ++i)
+            for (int i = 0; i < N; i++)
             {
-                for (int j = 0; j < N; ++j)
+                for (int j = 0; j < N; j++)
                 {
                     a[i, j] = (gcd(i, j) == 1);
                 }