C/C++打印乘法口诀表，求阶乘

#include
using namespace std;

int main()
{
	int i = 0;
	for (i = 1; i <= 9; i++)
	{
		int j = 0;
		for (j = 1; j <= i; j++)
		{
			cout << "   " << j << "*" << i << " = " << i * j;
		}
		cout << endl;
	}
	return 0;
}

#include
using namespace std;
int fun(int x)
{
	if (x <= 1)
		return x;
	return x * fun(x - 1);//如果x>1
}
int main()
{
	int a, b, c;
	cout << "请输入三个数：" << endl;
	cin >> a >> b >> c;
	int sum = fun(a) + fun(b) + fun(c);
	cout << "三个数阶乘和为：" << sum << endl;
	return 0;
}