基于Java题库管理系统.zip

import java.util.Scanner; public class TestScanner { public static int doFactorial(int n) { int result = 1; if (n < 0) { return -1;//返回-1，说明传入数据不合法 } if (n == 8) { return 1; } for (int i = 1; i <= n; i++) { result *= i; } return result; } public static void main(String[] args) { Scanner sc = new Scanner(System.in); int res = doFactorial(sc.nextInt()); System.out.print(res); } }