1.

     

    Student { 

        double getTuition() {

            HR humRes;

            Person father = getFather();
            int fatherID = humRes.getEmployeeID(father);
            Employee fatherEmp = humRes.getEmployee(fatherID);  // possibly invalid!

            Person mother = getMother(); 
            int motherID = humRes.getEmployeeID(mother);
            Employee motherEmp = humRes.getEmployee(motherID);  // possibly invalid!


            if (fatherID != -1 && fatherEmp.getClassification() == 0)
                return 5000;
            else if (motherID != -1 && motherEmp.getClassification() == 0)
                return 5000;
            else if (fatherID != -1 && fatherEmp.getClassification() == 1)
                return 7500;
            else if (motherID != -1 && motherEmp.getClassification() == 1)
                return 7500;   
            else
                return 10000;
       }             

----------------------------------------------------------------------

      a more cautious alternative coding .....

            Employee fatherEmp;
            Employee motherEmp;
            if (fatherID != -1) {
                 fatherEmp = humRes.getEmployee(fatherID);
            }

            if (motherID != -1) {
                 motherEmp = humRes.getEmployee(motherID);
            }

----------------------------------------------------------------------

      an example of INCORRECT code  (overcharges a student 
                                       whose father is staff and
                                       whose mother is faculty
                

            if (fatherID != -1 && fatherEmp.getClassification() == 0)
                return 5000;
            else if (fatherID != -1 && fatherEmp.getClassification() == 1)
                return 7500;
            else if (motherID != -1 && motherEmp.getClassification() == 0)
                return 5000;
            else if (motherID != -1 && motherEmp.getClassification() == 1)
                return 7500;   
            else
                return 10000;

----------------------------------------------------------------------


2.

           Library lib("Engineering");
           for (int b = 0; b < lib.getBookCount(); b++) {

                 Book bk = lib.getBook(i);

                 if (bk.getPublicationDate() < 1970) {

                       // book is old

                       if (bk.getCheckOutCount() > 1)  {
                            // keep this old book
                       } else {
                            bk.markForDiscard();  
                       }
                 } 
                    
           }      

----------------------------------------------------------
    an alternative 


           Library lib("Engineering");
           for (int b = 0; b < lib.getBookCount(); b++) {

                 Book bk = lib.getBook(i);

                 if (bk.getPublicationDate() < 1970 && 
                     bk.getCheckOutCount() <= 1) {

                     bk.markForDiscard();   
                 } 
                    
           }      


-------------------------------------------------------------------------

 3.  Two solutions depending on how you interpreted or fixed the problem
   

            char cityName[MAXSTR];
            Forecasts casts[10];

            leastRain = -1;
            City leastRainyCity;


            // for all cities
            for (int c = 0; c < cityCount; c++) {

                cities[c].getName(cityName);
                WeatherService ws(cityName);    // construct a WeatherService object with city name
                ws.getForecasts(10,casts);

                double totRain = 0;
                for (int d = 0; d < 10; d++) {
                    totRain += casts[d].getRainfall();
                }

                if (leastRain == -1 || totRain < leastRain) {
                    leastRain = totRain;
                    leastRainyCity = cities[c];
                }

            }

            leastRainyCity.getName(cityName);
            cout << cityName;




-----------------------------------------------------------


            WeatherService ws("Weather Channel");
            char cityName[MAXSTR];
            Forecasts casts[10];

            leastRain = -1;
            City leastRainyCity;


            // for all cities
            for (int c = 0; c < cityCount; c++) {

                ws.getForecasts(10,casts,cities[c]);  // specify city in getForecasts

                double totRain = 0;
                for (int d = 0; d < 10; d++) {
                    totRain += casts[d].getRainfall();
                }

                if (leastRain == -1 || totRain < leastRain) {
                    leastRain = totRain;
                    leastRainyCity = cities[c];
                }

            }

            leastRainyCity.getName(cityName);
            cout << cityName;


4.

       Person homer("Homer");
       double allowance = homer.getCalorieAllow();

       for (int d = 0; d < dessertCount; d++) {

            if (desserts[d].getCalories() <= 0.1*allowance &&
                homer.likes(desserts[d]) {

                desserts[d].display();

            }

       }



5.



       int getDayOfYear() {
 
           int dayOfYear = 0;
           
           // preceding months

           for (int m = 1; m < month-1; m++) {
                dayOfYear += daysInMonth(m);              
           }

           if (isLeapYear(year) && m > 2)
                dayOfYear++; 

           dayOfYear += day;

           return dayOfYear;
       }