Question

10) b.        Given the following, what will print out?

                                          sum = 1;
              cnt = 0;
              do
              {        sum = sum + cnt;
                        cnt = sum + 2;

                                          } while ( cnt < 10 )
                                cout << “sum = “ << sum << “ cnt = “ << cnt << endl;

         

      (5) b.   Is the above a good way to write a loop? Explain. (Think of parts of a loop.)

Answer 1

Question 1:
Code prints
sum = 10 cnt = 12

Question 2:
Generally we increment the loop control variable as cnt = cnt + 2;
But not using other variable as cnt = sum + 2;
FIX:
int sum = 1;
int cnt = 0;
do
{
    sum = sum + cnt;
    cnt = cnt + 2;
} while ( cnt < 10 );
cout << "sum = " << sum << " cnt = " << cnt << endl;