SCC111: weeks 11-15

Question 1

what type of programming language is C++?

Answer 1

-procedural programming language

Question 2

what is a procedural programming language?

Answer 2

-programs are executed in an order: sequentially

Question 3

what are some key features of a procedural programming language?

Answer 3

-there is a well-defined starting point to the program
-code is broken down into manageable chunks (functions)
-variables are passed as parameters between functions

Question 4

what is the benefit of using object orientated programming languages?

Answer 4

-encapsulates data
-variables belonging to an object are attributes
-functions belonging to an object are methods
-programmers can choose the visibility of data belonging to an object

Question 5

how are classes defined in C++?

Answer 5

class Car{

};

//REMEMBER THE SEMICOLON

Question 6

how would you define the class car with the variable colour and the method repaint?

Answer 6

class Car{
char* colour;
public:
void repaint(char* newColour);
};

void Car::repaint(char* newColour){
colour = newColour;
}

Question 7

how would you create a new instance of a car class and call the repaint function on it?

Answer 7

Car myCar;

myCar.repaint((char*)”Red”);

Question 8

how would you declare public and private methods and attributes?

Answer 8

class Car{
private:
int milesDriven = 0;
int getMilesDriven();
public:
char colour;
int repaint(char newColour);
};

Question 9

how is a class constructor written?

Answer 9

class Car{
public:
Car();
};
Car::Car(){
//initialisation code here
}

Question 10

can classes in C have multiple constructors??

Answer 10

yus

Question 11

how are constructors differentiated between?

Answer 11

-different parameters needed for each one

Question 12

what is a destructor?

Answer 12

function that is invoked automatically when an object is being destroyed.

Question 13

what is the syntax for a destructor?

Answer 13

class BankAccount{
//attributes and methods
//destructor:
~BankAccount();
};
BankAccount::~BankAccount(){
//destructor code
}