cpp1

Question 1

how to read variable types?

Answer 1

1. start reading at the variable’s name
2. read as far as possible until you reach the end of the declaration or
   an (as yet unmatched) closing parenthesis.
3. return to the point where you started reading, and read backwards
   until you reach the beginning of the declaration or a matching opening
   parenthesis.
4. If you reached an opening parenthesis, continue at step 2 beyond the
   parenthesis where you previously stopped.

Question 2

als je een reference in een functie wil hebben naar een variable in main dan doe je:

Answer 2

void increase(int &valr) // expects a reference
{ // to an int
valr += 5;
}
increase(x);

Question 3

how do you call a double array to a function?

Answer 3

Double array in parameters[][80] de 2e is belangrijk de eerste niet. Want de 2e is de grootte van hie ver de volgende pointer verder moet zijn dan de vorige.

Question 4

welke casts?

Answer 4

static cast
const cast
reinterpret cast

Question 5

what does ios do?

Answer 5

inherits from ios_base and additionally implements communications with a buffer used by streams.

it thus uses streambuf object

Question 6

how to return mutiple things from funtcion?

Answer 6

use a structured binding declaration such as: struct, tuple, pair

Question 7

make a function not accepting any arguments

Answer 7

function(void)

Question 8

ifndef is an

Answer 8

include guard

Question 9

how to prevent this backdoor?

string &Person::name() const
{
return d_name;
}

Person somebody;
somebody.setName("Nemo");

somebody.name() = "Eve";    // Oops, backdoor changing the name

Answer 9

return a const string & ipv string &

Question 10

ambiguity resolution

Answer 10

• More in general: when possible the compiler will interpret a syntactic construction as a declaration, rather than as a definition (of an object or variable).
• Most problems that result from the compiler interpreting constructions as declarations are caused by us using parentheses. As a rule of thumb: use curly braces, rather than parentheses when constructing objects (or values)

Type object{ value list };
Fun(fun); //making an anonymous object often doesnt work
//it parses it as Fun fun which is the definition of fun using a 
//constructor without arguments.
//however:
Fun{fun} can be done

Question 11

what member function is always preferred?

Answer 11

a const member function

Question 12

how are references and pointers related

Answer 12

references are const pointers but no indirection takes place

Question 13

To cast an object to an rvalue reference

Answer 13

use move semantics (e.g.

std::move(obj))

Question 14

diff array and pointer

Answer 14

The name of an array is a pointer to its begin
location in memory.
A main difference between arrays and pointers is that an array is an rvalue, whereas a pointer is an
lvalue.

Question 15

const komt

Answer 15

DIRECT na datgene wat const is. dus *const is een const pointer maar **const is een const pointer naar een pointer (of array).