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原文:http://it.100xuexi.com/view/otdetail/20130114/1fa06deb-23e8-4732-bb3c-5a066ea14bb2.html 本文向大家介绍C#数组操作,可能好多人还不了解C#数组操作,没有关系,看完本文你肯定有不少收获,希望本文能教会你更多东西。 数组是相同类型的对象的集合。由于数组几乎可以为任意长度,因此可以使用数组存储数千乃至数百万个对象,但必须在创建数组时就确定其大小。数组中的每项都按索引进行访问,索引是一个数字,指示对象在数组中的存储位置或槽。数组既可用于存储引用类型,也可用于存储值类型。
C#数组操作程序:
1. using System; 2. using System.Collections.Generic; 3. using System.Text; 4. 5. namespace ClassAboutArray 6. { 7. public class CreateArray 8. { 9. /// <summary> 10. /// 一维数组的定义 11. /// </summary> 12. public void testArr1() 13. { 14. int[] myIntArr = new int[100]; 15. //定义一个长度为100的int数组 16. string[] mystringArr = new string[100]; 17. //定义一个长度为100的string数组 18. object[] myObjectArr = new object[100]; 19. //定义一个长度为100的int数组 20. 21. int[] myIntArr2 = new int[] { 1, 2, 3 }; 22. //定义一个int数组,长度为3 23. string[] mystringArr2 = new string[] { "油", "盐" }; 24. //定义一个string数组,长度为2 25. } 26. 27. /// <summary> 28. /// 多维数组的定义 29. /// </summary> 30. public void testArr2() 31. { 32. int[,] myIntArr = new int[10, 100]; 33. //定义一个10*100的二维int数组 34. string[, ,] mystringArr = new string[2, 2, 3]; 35. //定义一个2*2*3的三维string数组 36. 37. int[,] myIntArr2 = new int[,] { { 1, 2, 3 }, { -1, -2, -3 } }; 38. //定义一个2*3的二维int数组,并初始化 39. string[,] mystringArr2 = new string[,] { { "油", "盐" }, { "《围城》", "《晨露》" } }; 40. //定义一个2*2的二维string数组,并初始化 41. } 42. 43. /// <summary> 44. /// 交错数组的定义 45. /// </summary> 46. public void testArr3() 47. { 48. int[][] myJaggedArray = new int[3][]; 49. myJaggedArray[0] = new int[5]; 50. myJaggedArray[1] = new int[4]; 51. myJaggedArray[2] = new int[2]; 52. 53. int[][] myJaggedArray2 = new int[][] 54. { 55. new int[] {1,3,5,7,9}, 56. new int[] {0,2,4,6}, 57. new int[] {11,22} 58. }; 59. } 60. } 61. 62. public class TraverseArray 63. { 64. /// <summary> 65. /// 使用GetLowerBound|GetUpperBound遍历数组 66. /// </summary> 67. public void test1() 68. { 69. //定义二维数组 70. string[,] myStrArr2 = new string[,] { { "油", "盐" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } }; 71. //循环输出 72. for (int i = myStrArr2.GetLowerBound(0); i <= myStrArr2.GetUpperBound(0); i++) 73. { 74. Console.WriteLine("item{0}", i); 75. for (int j = myStrArr2.GetLowerBound(1); j <= myStrArr2.GetUpperBound(1); j++) 76. { 77. Console.WriteLine(" item{0}{1}:{2}", i, j, myStrArr2.GetValue(i, j)); 78. } 79. } 80. } 81. 82. /// <summary> 83. /// 使用foreach遍历数组 84. /// </summary> 85. public void test2() 86. { 87. //定义二维数组 88. string[,] myStrArr2 = new string[,] { { "油", "盐" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } }; 89. //循环输出 90. foreach (string item in myStrArr2) 91. { 92. { 93. Console.WriteLine("{0}", item); 94. } 95. } 96. } 97. } 98. 99. public class SortArray 100. { 101. /// <summary> 102. /// 利用Sort方法进行数组排序 103. /// </summary> 104. public void test1() 105. { 106. //定义数组 107. int[] myArr = { 5, 4, 3, 2, 1 }; 108. 109. //输出原始数组:原始数组:5->4->3->2->1-> 110. Console.WriteLine("原始数组:"); 111. for (int i = 0; i < myArr.Length; i++) 112. Console.Write("{0}->", myArr[i]); 113. Console.WriteLine(); 114. 115. //对数组排序 116. Array.Sort(myArr); 117. 118. //并输出排序后的数组:1->2->3->4->5-> 119. Console.WriteLine("排序以后数组:"); 120. for (int i = 0; i < myArr.Length; i++) 121. Console.Write("{0}->", myArr[i]); 122. } 123. 124. /// <summary> 125. /// 多个数组的关键字排序 126. /// </summary> 127. public void test2() 128. { 129. //定义数组 130. int[] arrSid = { 5, 4, 3, 2, 1 }; 131. string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" }; 132. 133. //输出原始数组:原始数组:张三(5)->李四(4)->王五(3)->麻子(2)->淘气(1)-> 134. Console.WriteLine("原始数组:"); 135. for (int i = 0; i < arrSid.Length; i++) 136. Console.Write("{0}({1})->", arrSname[i], arrSid[i]); 137. Console.WriteLine(); 138. 139. //根据学号关键字排序 140. Array.Sort(arrSid, arrSname); 141. 142. //并输出排序后的数组:淘气(1)->麻子(2)->王五(3)->李四(4)->张三(5) 143. Console.WriteLine("排序以后数组:"); 144. for (int i = 0; i < arrSid.Length; i++) 145. Console.Write("{0}({1})->", arrSname[i], arrSid[i]); 146. } 147. } 148. 149. public class SearchArray 150. { 151. /// <summary> 152. /// 利用BinarySearch方法搜索元素 153. /// </summary> 154. public void test1() 155. { 156. //定义数组 157. int[] myArr = { 5, 4, 3, 2, 1 }; 158. 159. //对数组排序 160. Array.Sort(myArr); 161. 162. //搜索 163. int target = 3; 164. int result = Array.BinarySearch(myArr, target); //2 165. Console.WriteLine("{0}的下标为{1}", target, result); //2 166. } 167. 168. /// <summary> 169. /// 判断是否包含某个值 170. /// </summary> 171. public void test2() 172. { 173. //定义数组 174. string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" }; 175. 176. //判断是否含有某值 177. string target = "王五"; 178. bool result = ((System.Collections.IList)arrSname).Contains(target); 179. Console.WriteLine("包含{0}?{1}", target, result); //true 180. } 181. } 182. 183. public class ReverseArray 184. { 185. /// <summary> 186. /// 利用Reverse方法反转数组 187. /// </summary> 188. public void test1() 189. { 190. //定义数组 191. int[] myArr = { 5, 4, 3, 2, 1 }; 192. 193. //输出原始数组:原始数组:5->4->3->2->1-> 194. Console.WriteLine("原始数组:"); 195. for (int i = 0; i < myArr.Length; i++) 196. Console.Write("{0}->", myArr[i]); 197. Console.WriteLine(); 198. 199. //对数组反转 200. Array.Reverse(myArr); 201. 202. //并输出反转后的数组:1->2->3->4->5-> 203. Console.WriteLine("反转以后数组:"); 204. for (int i = 0; i < myArr.Length; i++) 205. Console.Write("{0}->", myArr[i]); 206. } 207. } 208. 209. public class CopyArray 210. { 211. /// <summary> 212. /// 利用Copy静态方法复制数组 213. /// </summary> 214. public void test1() 215. { 216. //定义数组 217. int[] myArr = { 5, 4, 3, 2, 1 }; 218. 219. //输出原始数组:原始数组:5->4->3->2->1-> 220. Console.WriteLine("原始数组:"); 221. for (int i = 0; i < myArr.Length; i++) 222. Console.Write("{0}->", myArr[i]); 223. Console.WriteLine(); 224. 225. //复制数组 226. int[] newnewArr = new int[3]; 227. Array.Copy(myArr, newArr, 3); 228. 229. //并输出反复制的数组:5->4->3-> 230. Console.WriteLine("复制数组:"); 231. for (int i = 0; i < newArr.Length; i++) 232. Console.Write("{0}->", newArr[i]); 233. } 234. 235. /// <summary> 236. /// 利用CopyTo实例方法复制数组 237. /// </summary> 238. public void test2() 239. { 240. //定义数组 241. int[] myArr = { 5, 4, 3, 2, 1 }; 242. 243. //输出原始数组:原始数组:5->4->3->2->1-> 244. Console.WriteLine("原始数组:"); 245. for (int i = 0; i < myArr.Length; i++) 246. Console.Write("{0}->", myArr[i]); 247. Console.WriteLine(); 248. 249. //复制数组 250. int[] newnewArr = new int[7]; 251. myArr.CopyTo(newArr, 2); 252. 253. //并输出反复制的数组:0->0->5->4->3->2->1-> 254. Console.WriteLine("复制数组:"); 255. for (int i = 0; i < newArr.Length; i++) 256. Console.Write("{0}->", newArr[i]); 257. } 258. } 259. 260. public class DynamicCreateArray 261. { 262. /// <summary> 263. /// 利用CreateInstance动态创建数组 264. /// </summary> 265. public void test1() 266. { 267. //定义长度数组 268. int[] lengthsArr = new int[] { 3, 4 }; 269. int[] lowerBoundsArr = { 1, 11 }; 270. 271. Array arr = Array.CreateInstance(Type.GetType("System.Int32"), lengthsArr, lowerBoundsArr); 272. 273. Random r = new Random(); //声明一个随机数对象 274. //循环赋值、输出 275. for (int i = arr.GetLowerBound(0) - 1; i < arr.GetUpperBound(0) - 1; i++) 276. { 277. for (int j = arr.GetLowerBound(1) - 1; j < arr.GetUpperBound(1) - 1; j++) 278. { 279. arr.SetValue((int)r.Next() % 100, i, j);//用1~100的随即数赋值 280. Console.WriteLine("arr[{0},{1}]={3}", i, j, arr.GetValue(i, j)); 281. } 282. } 283. } 284. } 285. }
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