Do

#include <iostream>

using namespace std;
int main()
{
//计算s=1+2+3...+100
int s = 0;
int n = 0;
do
{
n++;
s += n;

} while (n <= 100);
cout << "s = " << s-1 << endl;

//累加键盘输入的数据

double x;
double sum = 0.0;
do
{
	cout << "x=";
	cin >> x;
	sum += x;
} while (x != 0);
cout << "sum = " << sum << endl;
return 0;

}