#include <iostream>
using namespace std;
long long int summation(long long int start, long long int howMany);
 
int main ()
{
   long long int s = 0;
   long long int h = 0;
 
   while (s < 1000)
   {
       cout << "Please enter the starting value: ";
       cin >> s;
   }
   while (h <= 250)
   {
       cout << "Please enter how many numbers to sum: ";
       cin >> h;
   }
 
   cout << "The summation of the numbers from " << s << " to " << h + s - 1
       << " is " << summation(s,h) << endl;
 
 
   return 0;
}
 
/*****************
 * Function Name: summation
 * Paremeters: long long int start, long long int howMany
 * Return Value: long long int-sum
 * Description: this adds the numbers from the starting value up until
 *              the required number of values have been added together.
 *****************/
 
long long int summation(long long int start, long long int howMany)
{
   // SHOULD DO THE SUMMATION STUFF RIGHT HERE.
 
   return sum;
}

long long int summation(long long int start, long long int howMany)
{
   long long sum=0;
   for(long long i=0,j=start;i<howMany;++i,++j)
      sum += j;
   return sum;
}