import java.io.*;
class jiecheng
{
public static void main(String[] args)
{
int n,sum;
try
{
System.out.println("输入n:");
n=(int)System.in.read();
//n=System.in.read();
}
catch (IOException e)
{
} sum=funtion(n);
System.out.println("The sum is:"+sum); int funtion(int a)
{
if (a==1) return 1;
return a*funtion(a-1);
} }
}
class jiecheng
{
public static void main(String[] args)
{
int n,sum;
try
{
System.out.println("输入n:");
n=(int)System.in.read();
//n=System.in.read();
}
catch (IOException e)
{
} sum=funtion(n);
System.out.println("The sum is:"+sum); int funtion(int a)
{
if (a==1) return 1;
return a*funtion(a-1);
} }
}
import java.util.Scanner;public class jiecheng { static int n = 0, sum = 1, result = 1; public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("please n:");
n = sc.nextInt(); sum = funtion(n);
System.out.println("The sum is:" + sum); } static int funtion(int a) {
if (a == 0)
return 0;
result *= a;
a--;
if (a != 0)
funtion(a);
return result;
}
}