import java.util.Scanner;
public class Main {
static Scanner scan = new Scanner(System.in);
public static void main(String[] args)
{
while ( scan.hasNextInt() )
{
double x;
x = scan.nextDouble();
x *= Math.PI / 180;
System.out.printf("%.3f",Math.sin( x ));
}
}
}
运行截图:

