Identifiers

Question 1

In C++ there are 6 basic containers

Answer 1

(int, float, double,

char, string, and boolean)

Question 2

int (Integer)

Answer 2

used to store whole numbers, positive

and negative, including zero

Question 3

float and double

Answer 3

used to store decimal numbers, positive

and negative.

Question 4

char (character)

Answer 4

used to store a “single” letter, number,

symbol, or space. [All char types use ‘’]

Question 5

string

Answer 5

used to store “zero or more” letters, numbers,

symbols, or spaces. [All string types use “”]

Question 6

bool (boolean)

Answer 6

used to hold boolean logic, which can contain

a value of 0 or 1.

Question 7

Declaring (creating) variables and constants (Three steps)

Answer 7

a) Choose the data type (or container)
b) Choose the indentifier name (label it)
c) Initialize the value (Required for constants)

Question 8

c) Initialize the value (Required for constants

Answer 8

1. numerical values - initialize with a 0

2. non-numerical values - initialize with a empty string or char

Question 9

ex identifiers

Answer 9

int age = 0;
	   string bldgName = " ";
	   char middle_Initial = ' ';
	   bool isActive = 0;
	   float gpa = 0;
	   const double PI = 3.14;
	   const int DAYS_OF_THE_WEEK = 7;

Question 10

Naming convention for indentifiers

Answer 10

a) If it is defined as a const type, use ALL-CAPS for the name
b) For multi-word names, either use camel-case or underscores
c) Always start with a letter
d) After the first letter of the name, you can use letters,
numbers, and underscores.

Question 11

Assigning values to variables

Answer 11

a) The assignment operator “=” is used to assign values

b) The right-hand side is assigned to the left (LHS = RHS)

Question 12

Other notes

Answer 12

a) You can’t use a variable unless you DECLARE IT FIRST.
b) When you give a variable or constant a name, it is bound
by that EXACT name. (C++ is CaSe SeNsItIvE)

	  ex.  int age = 0; AND int aGe = 0;  (Different variables)

Question 13

[Ex.] Declare identifiers

Re-assign variables

Answer 13

int age = 0;
	string bldgName = " ";
	char middle_Initial = ' ';
	bool isActive = 0;
	float gpa = 0;
	const double PI = 3.14;
	const int DAYS_OF_THE_WEEK = 7;

 int num1 = 10000;
   int num2 = 20;
   string name = "William";
   char grade = 'A';
   bool isGraduating = 1;
   float gpa = 3.2;