Intro to C++

Question 1

What does the #include directive do?

Answer 1

Causes another file to be inserted into the program. Usually library files that contain specific definitions.

Question 2

C++ is case sensitive, which means…

Answer 2

Anything written in lowercase will not be read the same way as something in uppercase.

Question 3

All programs must have a…

Answer 3

main function.

Question 4

What are the two ways that main can be defined?

Answer 4

int main() and void main(void)

Question 5

What do output statements do?

Answer 5

send the user messages, results, questions, etc from the computer.

Question 6

What format does an output statement usually take?

Answer 6

the cout object, the insertion operator, and variables or constants to be displayed.

Question 7

What is the insertion operator?

Answer 7

«

Question 8

What is an escape sequence?

Answer 8

something that performs a specific output task when enclosed in quotes.

Question 9

What does \n do?

Answer 9

causes the cursor to go to the next line

Question 10

what does \t do?

Answer 10

causes the cursor to go to the next tab stop.

Question 11

What does \a do?

Answer 11

Causes the computer to beep

Question 12

What does \ do?

Answer 12

Causes a backslash to be printed.

Question 13

What does ' do?

Answer 13

Causes a single quote to be printed.

Question 14

What does " do?

Answer 14

Causes a double quote to be printed.

Question 15

what does endl do?

Answer 15

returns output to next line.

Question 16

What is an identifier?

Answer 16

names or symbols used by the programmer to refer to times such as variables, named constants, functions, classes, ect.

Question 17

What words are off limits as identifiers?

Answer 17

Any key words or reserved words.

Question 18

What must an identifier be comprised of?

Answer 18

Only letters, numbers, or the underscore.

Question 19

What is the rule for the first character of an identifier?

Answer 19

it must be a letter or underscore.

Question 20

What do variables refer to?

Answer 20

memory locations in which the value stored may change throughout the execution of the program.

Question 21

What do named or symbolic constants refer to?

Answer 21

memory locations in which the values do not change during the course of the program.

Question 22

You must define or declare a variable before you may use it!

Answer 22

.

Question 23

What is the format of a variable definition?

Answer 23

datatype variablename;

Question 24

What is false represented as in a computer

Answer 24

Zero

Question 25

What is true represented as in a computer

Answer 25

True is one and any number other than zero

Question 26

What does datatype char hold

Answer 26

A single character value

Question 27

What Are c-strings?

Answer 27

Arrays of characters

Question 28

What are string objects

Answer 28

Variables that have to be declared of the string class

Question 29

What preprocessor directive is required to use the string class

Answer 29

String

Question 30

What format do constant declarations have

Answer 30

Const datatype identifier = value

Question 31

What does data type determine?

Answer 31

How the data will be stored and what types of operations can be performed on this data.

Question 32

What types of data types are there?

Answer 32

integers, real numbers, characters, boolean

Question 33

What subtypes of integer data types are there?

Answer 33

short, unsigned short, int, unsigned int, long, unsigned long, long long int, unsigned long long

Question 34

What types of floating point data types are there?

Answer 34

float, double, long double

Question 35

What is boolean data?

Answer 35

data that is either true or false

Question 36

How can you declare multiple variables with the same data type?

Answer 36

in a single statement. | datattype var1, var2, var3;

Question 37

What are assignment statements used for?

Answer 37

to store values in the memory locations.

Question 38

What is the assignment operator?

Answer 38

=

Question 39

When are named constants assigned?

Answer 39

At the time they are declared.

Question 40

When can assignments to variables occur?

Answer 40

At declaration, or any time after.

Question 41

How do assignment statements work?

Answer 41

The result of whatever is on the right side, is stored in the variable on the left side.

Question 42

What does truncated mean?

Answer 42

Data is lost to change a value.

Question 43

When are numbers truncated?

Answer 43

When they do not fit in the data type they are being stored in.

Question 44

How many characters can data type char store?

Answer 44

1 character

Question 45

What type of quotation marks must you use with the char data type?

Answer 45

Single quotes

Question 46

Why do you use single quotes with char data type?

Answer 46

Because double quotes include an end character, so is stored as one more character than it actually.

Question 47

What are strings?

Answer 47

a collection of characters

Question 48

What are the two methods of creating strings?

Answer 48

c-strings and string objects

Question 49

What is a c-string?

Answer 49

an array of characters

Question 50

When can C-strings be assigned

Answer 50

at the time of declaration.

Question 51

What do strings require you include?

Answer 51

the string preprocessor directive

Question 52

What are the three types of operators?

Answer 52

unary, binary, and ternary

Question 53

What is a unary operator?

Answer 53

operator that requires one operand.

Question 54

what is a binary operator?

Answer 54

operator that requires two operands

Question 55

What is a ternary operator?

Answer 55

an operator that requires three operands.

Question 56

What does the operator modulus (%) do?

Answer 56

Finds the remainder of the division of two integers.

Question 57

integers operated on by integers will result in...

Answer 57

integers

Question 58

floating points operated on by integers will result in...

Answer 58

floating points

Question 59

What is the order of operations for operators?

Answer 59

parenthesis, unary negation, multiplication/division/modulus, addition/subtraction

Question 60

What order are operations of equal precedence performed in?

Answer 60

from left to right.

Question 61

Any number without a decimal point is assumed to be...

Answer 61

an integer.

Question 62

How do multiple assignments work?

Answer 62

many variables can be assigned the same number by placing them as x=y=z=a=b=c=3.0;

Question 63

What are the Four types of Control Structures?

Answer 63

Sequence, Branched, Loops, Functions

Question 64

Describe sequence (control structure)

Answer 64

statements are executed in order they are written

Question 65

What is the Branched control structure?

Answer 65

some statements may be executed only when a specific condition is met.

Question 66

What is the loop control structure?

Answer 66

statements are repeated

Question 67

describe the functions control structure

Answer 67

a group of statements are executed at various times in the program.