编写程序计算级数ex=1+x+x2/2!+x3/3!+...+xn/n!的值.

#include
using namespace std;
int pow(int x,int n);
int f1(int n);
int main(int argc,char* argv[])
{
int x,n;
double ex = 1;
cin >> x;
cin >> n;
for (int i=1; i