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 = 0; i < array.Length; i++)
            {
                while (true)
                {
                    var index = s2.IndexOf(array[i]);
                    if (index == -1) break;
                    s2 = s2.Remove(index, 1);
                }
            }
            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 = 0; 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 != -1)
            {
                s2 = s2.Remove(index, 1);
                s2 = GetStr2(v, s2);
            }
            return s2;
        }