import java.util.Scanner;

public class qq{

public static void main (String[] args){

int sum=1;

Scanner input = new Scanner(System.in);

String str = in.nextLine();

int n = Integer.valueOf(str);

for(int i = 1;i<=n;i++){

sum=sum*i;

}

System.out.println("運行結果:" + sum);

}

}

編譯時為什么顯示找不到符號