chap 3 C++
Expression
is any combination of constants, variables and functions
coercion
its when assignment operator is converted into data type
The constants 2 and 3.1416 in the assignment statement circum=2 * 3.1416 * radius: are _______
literals
Any expression that is terminated by a ____ become a C++ statement.
semicilon
+=
shortcut assignment operators:
-=
shortcut assignment operators:
/=
shortcut assignment operators:
To calculate the square root of a number, you must include the reference to the library which explains the square root function.
true
The value of pow(x1,x2) is ____
x1 raised to the x2 power
All operands used in an expression must ____ before the expression can be evaluated
have values assigned to them
The const qualifier specifies that the declared identifier can only be read after it is_________
initialized
If n is initialized to the value 5, the expression --n changes the value of n to ______
4
assignment operator
=
The extraction operator used with cin is _____.
>>
validade
Checking that the entered value matches the data type of the variable it's assigned to in a can statement and the value is within an acceptable range for the application
When the computer executes the statement area = length * width; it used whatever values are stored in the variables length and width at the time the assignment is executed. If no values have been specifically assigned to these variable before they are used in the expression length * width, the computer looks ahead to see the values you assign to these variables later in the program.
False
cast operator
The operator used to force converting a value to another type is the
The operator used to force the conversion of a value to another type is the _____ operator.
cast
prompt
When an output string is used to tell the person at the keyboard what should be typed.
const
a number that stays the same throughout the entire program These variables are normally in all caps. EX: TAXRATE
Professional programmers understand that it is their responsibility to ensure that a program ____ any and all input that a user can possibly enter.
anticipates and appropriately handles
One of the most common C++ programming errors is forgetting to ____ values for all variables that are used in an expression.
assign or initialize
C++ statement
assign values to variables
*=
assignment expression
sqrt()
calculates a number's square root
operand
constant or variable
The cin object is used to enter data into a program while it is ______
executing
The term validate means checking that the entered value _____ the data type of the variable that the value is assigned to within a cin statement.
matches exacly
If b in an integer and d is a double-precision number, the evaluation of the expression b * d is a(n) _____ value.
none of the answers
When a cout statement prints a string that tells the person at the terminal what should be typed, the output string used in this manner is called a(n)
prompt
flag
refers to a item such as variables or argument
sum = sum + 10; can be rewritten using ____ as a shortcut operator.
sum +=10;
Cast
the operator used to force converting a value to another type EX: int (a*b) staticCast <datatype> (expression)
A well-constructed program should validate user input and ensure that a program does not either crash or produce nonsensical output due to unexpected input.
true
An expression is any combination of constants and variables that can be evaluated to yield a result.
true
The statement sum = sum + 10; caused a new value to be stored in sum.
true
