This program calculate the sum from 1 to 100 using do-while loop.

#include <iostream>
using namespace std;

int main()
{
	int i, sum;
	sum = 0;
	i = 1;

	do 
	{
		sum = sum + i;
		i = i + 1;
	} while (i <= 100);
	cout << "Result: " << sum;
	cin.get();
  return 0;
}