c# 两个字符串，s="aeiou",s2="welcome to Quantum Asia"

c#  两个字符串，s="aeiou",s2="welcome to Quantum Asia"

方案一：

使用while循环：

  static void Main(string[] args)
         {
             string s = "aeiou";
             string s2 = "welecome to Quantum Asia";
             char[] array = s.ToCharArray();
             for (int i = ; i < array.Length; i++)
             {
                 while (true)
                 {
                     var index = s2.IndexOf(array[i]);
                     if (index == -) break;
                     s2 = s2.Remove(index, );
                 }
             }
             Console.WriteLine(s2);
             Console.ReadKey();
         }

方案二：

递归：

  static void Main(string[] args)
         {
             string s = "aeiou";
             string s2 = "welecome to Quantum Asia";
             char[] array = s.ToCharArray();

             for (int i = ; i < array.Length; i++)
             {
                 s2 = GetStr2(array[i], s2);
             }
             Console.WriteLine(s2);
             Console.ReadKey();
         }

         private static string GetStr2(char v, string s2)
         {
             var index = s2.IndexOf(v);
             if (index != -)
             {
                 s2 = s2.Remove(index, );
                 s2 = GetStr2(v, s2);
             }
             return s2;
         }