Write a program that simulates an adding machine. When a zero is entered it shou

Question

Write a program that simulates an adding machine. When a zero is entered it should print the subtotal of all the numbers entered from the last zero that was entered and reset the subtotal. When two consecutive zeroes are entered it should print the total (not the subtotal) of all the numbers entered and terminate the program. Example:
1
2
3
0
subtotal 6
4
5
-2
0
subtotal 7
8
0
subtotal 8
0
total 21

Be careful this program needs a bit more thought than you might think at first. To get full credit you must make sure it also works for the 0-0 case. Example;
0
subtotal 0
0
total 0

Explanation / Answer

please rate - thanks

#include <iostream>
using namespace std;
int main()
{
int sub=0,tot=0,n,prev=-1;
cout<<"start the adding machine ";
cin>>n;
while(!(n==0&&prev==0))
   {if(n==0)
       {cout<<"subtotal "<<sub<<endl;
       tot+=sub;
       sub=0;
       }
   else
       sub+=n;
   prev=n;      
    cin>>n;  
   }
cout<<"total "<<tot<<endl;
system("pause");
return 0;
}

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