求阶乘之和 1！+2！+3！+...+10!

用循环较易实现，递归只实现了求单个数的阶乘。代码如下：

//求 1!+2！+...+10!public class Jiechenghe {public static long func(int num){  //用循环求各阶乘之和long result=0;long f=1;for(int i=1;i<=num;i++){f=f*i; //求各个阶乘result=result+f;//前几个阶乘的和}return result;}public static long func1(int num){  //递归求单个数的阶乘if(num==1)return 1;return num*func1(num-1);}public static long func2(int num){ //循环调用递归函数求和long result=0;while(num!=0){result+=func1(num);num--;}return result;}public static void main(String[] args) {System.out.println(func2(3));}}