CS Week 4- Classes ll

Question 1

test bench

Answer 1

a program whose job is to thoroughly test another program (or portion) via a series of input/output checks (test cases)

Question 2

test cases

Answer 2

a series of input/output checks

Question 3

unit testing

Answer 3

to create and run a rest bench for a specific item like a function or a class

Question 4

some features of a good test bench

Answer 4

–Automatically checks(only fails printed → test.GetNum() != 100)
–Independent test cases
–100% coverage - every line of code is excited
—Include border cases

Question 5

Regression testing

Answer 5

to retest an item like a class anytime that item is changed

Question 6

regressed

Answer 6

If previous passed cases fail

Question 7

why should a test bench be maintained along with the item

Answer 7

to be usable for regression testing

Question 8

erroneous unit tests

Answer 8

may fail even if the code being tested is correct

Question 9

operator overloading

Answer 9

built-in operators to operate on programmer-defined objects

Question 10

overload +

Answer 10

Create a member function named operator+

pass in an argument (literally anything but better an object)

create a new objects

add the sub items

return the object

Question 11

overload the + multiple times

Answer 11

as long as each involves different types of parameters

Question 12

overload ==

Answer 12

create a member function named operator==

return a bool

take in 2 const reference parameters

compare the corresponding items in the return statement

Question 13

overload the < operator

Answer 13

return a bool

pass in 2 const reference parameters

if the lhs is < the rhs

Question 14

overloading all equality and relational operators

Answer 14

1st overload the == and < and use these for the rest of the

Question 15

overload the !

Answer 15

return a bool

pass in 2 const reference parameters

return !(lhs==rhs)

Question 16

overload >

Answer 16

return a bool

pass in 2 const reference parameters

return rhs < lhs

Question 17

overload <=

Answer 17

return a bool

pass in 2 const reference parameters

return !(lhs>rhs)

Question 18

overload >=

Answer 18

return a bool

pass in 2 const reference parameters

return !(lhs<rhs)

Question 19

using sort() function

Answer 19

include <algorithm></algorithm>

overload the < operator for the defined class

call sort()
sort(v.begin(), v.end());

Question 20

overload the «

Answer 20

into a buffer of wanting to output all the subitems of a class

Question 21

overload the&raquo_space;

Answer 21

into a buffer of wanting to input into all the subitems of a class

Question 22

why use “friend”

Answer 22

can see the sub items of the class

only use the friend in the declaration not definition

Question 23

in what order to include files in main

Answer 23

alphabetical order
<> then “”

Question 24

in what order to include files in implementation file

Answer 24

”” first

Question 25

Card.cpp vs Card.h

Answer 25

cpp - how it looks - the declarations
include where?

.h - header - how it works, definitions
include where?

Question 26

what to use so that you only include a file once

Answer 26

hashsymbol
pragma once

Question 27

what are the only files that will be included

Answer 27

.h

Question 28

preprocessor

Answer 28

a tool that scans the file from top to bottom looking for any lines that begin with #

Question 29

what does “” and <> tell the preprocessor

Answer 29

”” - same folder directory as the including file
<>- look in the system’s standard library folder/directory

Question 30

header file guards

Answer 30

preprocessor directives that cause the compiler to only include the contents of the header file once

hash ifndef FILENAME_H
hash define FILENAME_H
//contents
hash endif

Question 31

single step compilation

Answer 31

all source files are compiled at the same time to create the executable

g++ main.cpp filename.cpp

Question 32

modular compilation

Answer 32

each source file is independently compiled into an object file

g++ main.o filename.o

Question 33

object file

Answer 33

contains machine instructions for the compiled code along with placeholders, often referred to as references, for calls to functions or accesses to variables or classes defined in other source files

Question 34

linker

Answer 34

will create the final executable by linking together the object files and libraries

Question 35

define directive

Answer 35

hash define MACROIDENTIFIER replacement
- instructs the processor to replace any occurrence of MACROIDENTIFEIR in the subsequent program code by the replacement test

Question 36

name conflict

Answer 36

occurs when 2 or more items like variables, classes, or functions have the same name

Question 37

namespace

Answer 37

defines a region(or scope) used to prevent name conflicts

in main
fileName :: classname

in .h file
namespace fileName {
class className{
…
};
}

Question 38

std

Answer 38

standard namespace

Question 39

look over lecture notes