package java2;
import java.util.Scanner;
/**
* 计算 1+(1/2!).....
* @author 艺
*
*/
public class Factorial {
public static void main(String[] args) {
@SuppressWarnings("resource")
Scanner sc = new Scanner(System.in);
System.out.println("请输入你要计算的数:");
int a = sc.nextInt();
double sum = 0, item = 1;
int i = 1;
while( i <= a) {
sum = sum + item;
i++;
item = item * (1.0/i);
}
System.out.println(sum);
}
}
用java实现99乘法表
