#include<iostream>
#include<sys/timeb.h>
using namespace std;int main()
{timeb t1, t2;long t;double x, sum, tsum;int n;cout << "type the value of x and n: ";cin >> x >> n;ftime(&t1);sum = 1;for (int i = 1; i <= n; i++){tsum = 1;for (int j = 1; j <= i; j++)tsum = tsum * (-1.0) / x;sum += tsum;}cout << "result1: " << sum << endl;ftime(&t2);cout << "elapsed time: " << (t2.time - t1.time) * 1000 + t2.millitm - t1.millitm << endl << endl;ftime(&t1);sum = 1, tsum = 1;for (int i = 1; i <= n; i++){tsum = tsum * (-1.0) / x;sum += tsum;}cout << "result2: " << sum << endl;ftime(&t2);cout << "elapsed time: " << (t2.time - t1.time) * 1000 + t2.millitm - t1.millitm << endl;cin.get();cin.get();return 0;
}