阶乘和算法的改进之阶乘和

#include<iostream>

using namespace std;

 

int Factorials(int n)

{

if (n == 0)

return 1;

else

return n*Factorials(n-1);

}

int Factorialssum(int b)

{

int a;

for(int i = b;i >= 1;i--)

a+=Factorials(i);

return a;

}

 

int main(void)

{

cout<<Factorialssum(3)<<endl;

}