递归实现随机数累乘_c++ 递归累乘

#include<iostream>
using namespace std;
double again(double sum, int n);
int main()
{
	int n;
	srand((unsigned)time(NULL));
	n=rand() % 10 + 1;
	cout << "随机数共有 " << n << " 个。\n";
	cout << "这 " << n << " 个数分别为：";
	long long sum, num;
	num= rand() % 100 + 1;
	cout << num << " ";
	if (n == 1)
	{
		cout <<endl<< "the sum is:" << num;
		return 0;
	}
	else
	{
		sum = num;
		sum=again(sum, n-1);
		cout <<endl<< "the sum is:" << sum ;
		return 0;
	}
}
 
double again(double sum, int n)
{
	long long num;
	num = rand() % 100 + 1;
	sum *= num;
	cout << num << " ";
	if (n == 1)
		return sum;
	else
		sum = again(sum, n - 1);
	return sum;
}