#include <iostream>

using namespace std;

int main ()
{
 int val1, sum;

 val1 = 0;
 sum = 0;

 while ( val1 < 10)
    {
     val1++ ;            // this is the same as: val1 = val1 + 1;
     sum = sum + val1;   // this is the same as: sum += val1;
     cout << "val1: " << val1
          << " sum:  " << sum << endl;
    }

 cout << endl;
 cout << "val1: " << val1 << endl;
 cout << "sum:  " << sum << endl;

 val1 = 0;
 sum = 0;
 cout << endl;
 cout << "val1: " << val1 << endl;
 cout << "sum:  " << sum << endl;

 while ( val1 < 10)
    {
     sum = sum + val1;   // this is the same as: sum += val1;
     cout << "val1: " << val1
          << " sum:  " << sum << endl;
     val1++ ;            // this is the same as: val1 = val1 + 1;
    }

 cout << endl;
 cout << "val1: " << val1 << endl;
 cout << "sum:  " << sum << endl;

}