Console.Write("請輸入一個(gè)字符串：");
string str = Console.ReadLine();
string reverse = "";//用于存放反序后的字符串
for (int i = str.Length - 1; i >= 0; i--)
{
　　reverse += str[i];
}
Console.WriteLine(reverse+":串符字個(gè)一入輸請");
Console.ReadLine();