# Module 5. Loops Exercise Answers

```1.
const int ID_MAX = 999999;  // every student ID number is smaller
// than 999999
int id_number;  // student ID number
float score;    // student score on Exam 1
float average;  // average of all student Exam 1 scores
int counter;    // counter to determine number of students
float sum;      // sum of all student Exam 1 scores

sum = 0.0;
cin >> id_number >> score;
counter = 0;
while (id_number < ID_MAX)
{
sum += score;
counter++;
cin >> id_number >> score;
}
average = sum / counter;

2.
x = 0.0;
y = 100.0;

do
{
z = (x + y) / 2.0;
if (z*z > square)
y = z;
else
x = z;
}
while ( (y-x) >= 0.001);

3.
int day;            // counter for days in this month
int days_in_month;  // number of days in this month
int warm_days;      // number of warm days in this month
float temp;         // temperature for each day

warm_days = 0;
for (day = 1; day <= days_in_month; day++)
{
cin >> temp;
if (temp > FREEZING)
warm_days++;
}

4.  The break statement immediately terminates the loop.  The continue
statement skips the remainder of that loop iteration (that is, the
statement gravity *= deflection;), but can go through the loop again
if gravity is greater than or equal to air_pressure.
```