1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace ConsoleApplication4 7 { 8 class Program 9 { 10 static void Main(string[] args) 11 { 12 //通过圆的半径求圆的面积 13 double r, s; 14 Console.WriteLine("1.请输入圆的半径r:"); 15 r=Convert.ToDouble(Console.ReadLine());//从终端上取半径r的值,并把它转化为双精度格式 16 s = 3.14 * r*r; 17 Console.WriteLine("圆的面积S="+s); 18 //关于字符的ASCII转化 19 string x; 20 int y; 21 Console.WriteLine("2.想知道贵姓的ASCII码吗?"); 22 Console.WriteLine("请输入你的姓:"); 23 x = Console.ReadLine();//从终端读取x是字符; 24 y = Convert.ToChar(x);//将x转化为ASCII码并赋予y; 25 Console.WriteLine(x+"的ASCII码是:" + y); 26 } 27 } 28 }