$4$ Hierarchical Records

Use program Cars for Exercises $4-5.$

EGR $121$ Introduction to Computer Programming in $C++$

College of Engineering, California Baptist University $|5$

ifstream dataIn;

ofstream dataOut:

dataIn.open $($ "cars.dat"$)$;

dataOut.open $($ "cars.out"$)$ ;

cout $$ fixed $$ showpoint;

car $-$ GetCar$($ dataIn $)$;

whlle$($ dataIn $)$

$f$

car.price $-$ car.price $*1\mathrm{.}10$;

VriteCar$($ dataout, car $)$;

car $-$ GetCar$($ dataIn $)$ ;

$\}$

return $0$ ;

$\}$

CarType GetCar$($ ifstream$$ dataIn$)$

Exercise $4$:

Using Notepad, enter the following data into a file named cars $.$ dat:

Run the program. Show the content of the output file cars.out.

Exercise $5$:

Modify the CarType struct to add a Boolean type member called sold and a DateType member called

soldDate. In the GetCar function, initialize sold to false. In the while loop in function main, ask user

whether the car has been sold for each car record read from cars.dat. If the car is not sold, write the record

to cars.out with the price increased by $10\%$ as before. If the car is sold, call function CarSold. The void

function CarSold takes one parameter of CarType. It should ask the user when the car was sold, and

update two members of the reference parameter of CarType: set sold to true, and set soldDate with the

sold date entered by user, then write the updated record to file carssold.our instead of cars.out. Run your

program using file cars.dat and show your test results with I$/$O in console window, contents in

carssold.out and cars.out. You can assume that Mary's and Betty's cars have been resold. Include your

modified $C++$ program in the report.