program to find sum of the series in c++

Write a program to find out the sum of the series

1 + x + x2 + x2 ................ xn

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <math.h>

void main() {

clrscr();

int term,num;

long int sum=1;

cout<<"Enter the number to take the series of: ";

cin>>num;

cout<<"Enter the term for which the series is to be taken: ";

cin>>term;

for(int i=2;i<=term;i++) {

sum+=pow(num,i);

}

cout<<"The sum of the series: "<<sum;

getch();

}//end of the program