C++ standard library

Question 1

code written to be used as part of other programs

Answer 1

library

Question 2

libraries give you access to ready made blank

Answer 2

libraries give access to
functions
data
values

Question 3

Function example

Answer 3

getline( )

Question 4

Data type example

Answer 4

vector

Question 5

Value example

Answer 5

M_PI and M_e

Question 6

#include iostream
#include vector
these are blank

Answer 6

libraries
#include iostream
#include vector

Question 7

vector
map
array
these are blank

Answer 7

data types
vector
map
array

Question 8

Features of C++ Standard Libraries include

blank and blank facilities

Answer 8

Input and output facilities

Question 9

Features of C++ Standard libraries includes
blank and blank facilities
container blank blank
blank functions
implementation of useful blank
the blank data type
and more...

Answer 9

Features of C++ Standard Libraries include
input and output facilities
container data type 
mathematical functions
implementation of useful algorithms
the string data type
and more...

Question 10

#include vector
#include map
these are called blank

Answer 10

libraries but

these are container data types

Question 11

to use the features of C++ Standard library, you must #include the appropriate

Answer 11

header

Question 12

Examples of headers

Answer 12

#include iostream
#include string
#include vector

Question 13

#include cmath
#include cctype
#include cstring
#include cstdint
#include climits
these are all from

Answer 13

the older C standard library

yet still can be used by C++

Question 14

char variable = ‘a’
char string = to upper(variable);
what would the output be

Answer 14

A
note that char is the data type
‘variable’ is the variable
toupper() uppercases what is in parentheses

Question 15

#include cmath
has advanced math functions such as 
pow(blank, blank)
which returns blank raised to the power blank

Answer 15

pow(base, exponent)

which returns base raised to the power exponent

Question 16

#include cmath
also includes 
sqrt(x): returns the blank 
log(x): returns the natural base-e logarithm of blank
log10(x): returns the base-10 logarithm of x
abs(x): returns the blank
sin(x), cos(x), tan(x): trigonometric functions

Answer 16

sqrt(x): returns the square root of x
log(x): returns the natural base-e logarithm of x
log10(x): returns the base-10 logarithm of x
abs(x): returns the absolute value
sin(x), cos(x), tan(x): trigonometric functions

Question 17

#include cmath
predefined values such a
M_blank:

Answer 17

M_PI: Archimedes’ constant
M_E: Euler’s number
M_SQRT2: square root of 2

Question 18

#include cctype
contains functions for working with blank values

Answer 18

#include cctype
contains functions for working with char values

Question 19

#include cctype
contains functions for working with char values
isalnum(c): returns whether the character is alphanumeric 
isalpha(c): returns whether c is alphabetic
isdigit(c): returns whether c is numeric
islower(c): returns whether c is lower
isupper(c): whether c is uppercase
ispunct(c): whether it is punctuation
isdigit(c): returns whether c is a hex digit 

therefore we can see isblank return whether c is blank

Answer 19

therefore we can see isblank(c): returns whether c is blank

Question 20

blanks are a container that allow you to associate a key value with a blanked value arbitrarily

Answer 20

maps are a container that allow you to associate a key value with a mapped value arbitrarily.

Question 21

the blank blank can be used to look up the mapped value

Answer 21

key value can then be used to look up the mapped value

Question 22

a map might associate a student names with test scores, allowing a test score to be looked up by name
therefore the map would have two types

Answer 22

string for names

double for test scores

Question 23

to use maps, first put blank at the top of your program

Answer 23

to use maps, first put #include at the top of your program

Question 24

to declare a map, declare it with the blank and blank types in blank
example: blank (anglebracket)string, double(anglebracket) variable;

Answer 24

to declare a map, declare it with the key and mapped value types in angle brackets
map(angle bracket)string, double(angle bracket) variable;

Question 25

to place a value in the map, use blank

example: blank

Answer 25

to place a value in the map, use []:
make sure colon after []
scores[“Alice”] = 85.2;

Question 26

to access a value from the map, use blank

example: blank

Answer 26

to access a value from the map use []:

example: cout &laquo_space;“Alice made a “ &laquo_space;scores[“Alice”] &laquo_space;“/n”;

Question 27

to get the number of items mapped, use blank

example: blank

Answer 27

to get the number of items mapped, use .size():

example: int amount = scores.size();

Question 28

a data type for building or disassembling strings from various data types
modeled after input/output streams

Answer 28

stringstreams

Question 29

strings are built using blank to place a new data into the stream, then blank to extract the string

Answer 29

new data using «

extract the string using .str( )

Question 30

first put blank at the top of your program

Answer 30

first put #include sstream

Question 31

include sstream gives use the blank data type to use

Answer 31

stringstream stream;

the data type stringstream

Question 32

use blank to place data into the stringstream as you would cout

Answer 32

<

Question 33

example: for placing data into the stringstream

Answer 33

stream &laquo_space;123 &laquo_space;” “ &laquo_space;456.78

Question 34

Extract the string with blank

Answer 34

extract the string with .str( );

Question 35

example of extracting the string

Answer 35

string s = stream.str( );

Question 36

to extract data, first load a string into the stringstream using blank

Answer 36

.str( ):

Question 37

example of extracting data

Answer 37

stream.str(“123456.78”)

Question 38

extract information with&raquo_space;

example

Answer 38

int x;
stream&raquo_space; x;
double y;
stream&raquo_space; y;

Question 39

You can also use blank with stringstream:

Answer 39

getline( )
string my_string;
getline(stream, my_string);

Question 40

stringstream is blank ordered or unordered

Answer 40

ordered

Question 41

cin operator goes up to blank

Answer 41

spaces

Question 42

getline goes up to blank

Answer 42

\n