Summ

#include <iostream>

using namespace std;

int main()
{
setlocale(LC_ALL, "rus");

int n, s = 0,i=1;

do
{
cout<<"a["<<i<<"] -> ";
cin>>n;
if (n!=0)
s += n;
i++;
} while (n!=0);
cout<<"SUM : "<<s<<'\n';
system("pause");
return 0;
}