optimise files

CS/15_7/Program.cs

@@ -0,0 +1,23 @@
+using System.Text.RegularExpressions;
+
+namespace _15_7
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            MatchCollection mc;
+            string[] result = new string[20]; int[] matchposition = new int[20];
+            Regex r = new Regex("abc");
+            mc = r.Matches("123abc4abcd");
+            Console.WriteLine("源字符串123abc4abcd");
+            Console.WriteLine("匹配字符串abc");
+            for (int i = 0; i < mc.Count; i++)
+            {
+                result[i] = mc[i].Value;
+                matchposition[i] = mc[i].Index;
+                Console.WriteLine("索引位置{0}；结果{1}；", mc[i].Index, mc[i].Value);
+            }
+        }
+    }
+}