adding previous sums

[LDgaming]

I'm trying to write a code that adds the previous. I want to keep the tally going until the user inputs zero.

for example I want it to look something like this.
input 5 answer 5
input 7 answer 12
input 10 answer 22
and so on.


here is what I have so far but I realized I don't know what the proper language should be.

int main ()
{
int x;
int j;

while ( 1 )
{
    cout << "Please enter a number: ";
    cin >> x;

   if ( x == 0 )
   {
       break;
   }
   else
   {
        cin >> j = (x+j);
        cout << x << "plus previous answer is " << j;
   }
}
   cout << "Operation ended.";
}  

[Edward01]

change this: cin >> j = (x+j); to this: j = (x+j);