题解 | #字符逆序#
字符逆序
https://www.nowcoder.com/practice/cc57022cb4194697ac30bcb566aeb47b
using System; using System.Text;//方法2需要引用该命名空间 class Solution{ //方法1:前后调换 public static void Main(){ string s = Console.ReadLine(); var charArray = s.ToCharArray(); var len = charArray.Length; for(int i=0; i<len/2; i++){ var temp = charArray[i]; charArray[i] = charArray[len-i-1]; charArray[len-i-1] = temp; } for(int i=0; i<len; i++ ){ Console.Write(charArray[i]); } } //方法2:StringBuilder类 public static void Main(){ string s = Console.ReadLine(); var charArray = s.ToCharArray(); var len = charArray.Length; var res = new StringBuilder(); for(int i=len-1; i>=0; i--){ res.Append(charArray[i]); } Console.WriteLine(res); } }