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.