Chapter 7 C++
What will the following code display? int numbers[4] = {99, 87}; cout << numbers[3] << endl;
0
How many elements does the following array have? int values [1000];
1000
What will the following code display? vector <int> numbers (3,5); for (int val:numbers) cout << val <<endl;
3 5
What is the last legal subscript that can be used with the following array? int values [5];
4
What will the following code display? 49) int numbers[] = {99, 87, 66, 55, 101}; cout << numbers[3] << endl;
55
What will the following code display? 50) int numbers[] = {99, 87, 66, 55, 101}; for (int i = 1; i < 4; i++) cout << numbers[i] << " ";
87 66 55
A two- dimensional array of characters can contain
All of these
What does the following code do? 52) const int SIZE = 5;double x[SIZE];for (int i = 2; i <= SIZE; i++) { x[i] = 0.0; }
An error will occur when the code runs
Although two-dimensional arrays are novel idea, there is no known way to pass one to a function.
False
An array initialization list must be placed on one single line.
False
Assume array1 and array2 are the names of two arrays. To assign the contents of array2 to array1, you would use the following statement: array1= array2;
False
C++ limits the number of array dimensions to two.
False
If you attempt to store data past an array's boundaries, it is guaranteed to cause a compiler error.
False
The following statement is a valid C++ definition: double money [25.00];
False
The range based for loop only works with arrays. It cannot be used with vectors.
False
The range- based for loop is best used in situations where you need the element subscript for some purpose.
False
What does the following statement do? vector<int> v(10,2);
It creates a vector object with a starting size of 10 and initializes all the elements with the value 2
A vector object automatically expands in size to accommodate the items stored in it.
True
After the following code executes, the variable n2 will be assigned the value2: int narray[ ] = {1,2,3}; auto [n1,n2,n3] = narray;
True
An error will occur if you use the subscript operator to try to access a nonexistent vector element.
True
An individual array element can be processed like any other type C++ variable.
True
Each individual element of an array can be accessed by the array name and the element subscript.
True
If an array has been passed as an argument into a function, you cannot use a structured binding declaration in the receiving function to unpack the array.
True
If an array is partially initialized, the initialized elements will be set to zero.
True
The amount of memory used by an array depends on the array's data type and the number of elements in the array.
True
When you pass an array as an argument to a function, the function can modify the contents of the array.
True
You cannot use a range-based for loop to modify the contents of an array unless you declare the range variable as a reference variable.
True
An array can easily be stepped through by using
a for loop
To assign the contents of one array to another, you must use
a loop to assign the elements of one array to the other array
When writing a function that accept multi-dimensional arrays as arguments, ____ must be explicitly stated in the parameter list.
all but the first dimension
Unlike regular variables, _______ can hold multiple variables.
arrays
Subscript number in C++
begins with zero
An array's size declarator must be a ______ with a value greater than ______.
constant integer expression, zero
The individual values contained in an array are known as
elements
This vector function returns true if the vector has no elements.
empty
An array with no elements is
illegal in C++
This following statement shows an example of ______. int grades[ ] = {100, 90, 99, 80};
implicit array sizing
A(n) _______ can be used to specify the starting values of an array.
initialization list
Arrays must be ______ at the time they are _______.
initialized, declared
Which of the following is a valid C++ array definition?
int scores[25];
Which of the following is a valid C++ array definition?
int sizes[10];
What does the following statement do? vector<int> v(10);
it created a vector object with a starting size of 10
The name of an array stores the _______ of the first array element.
memory address
To pass an array as an argument to a function, pass the _______ of the array.
name
The ______ is automatically appended to a character array when it is initialized with a string constant.
null terminator
A two- dimensional array can have elements of ______ data type(s).
one
This vector function removes an item from a vector.
pop_back
This vector function is used to insert an item into a vector.
push_back
A two- dimensional array can be viewed as
rows and columns
Given the following declaration, where is the value 77 stored in the scores array? int scores [ ] = {83, 62, 77, 97, 86}
scores[2]
This vector function returns the number of elements in a vector.
size
An array of string objects that will hold five names would be declared with which of the following statements?
string names[5];
Assuming narray is an int array, what type of statement is this? auto [ v1, v2, v3] = narray;
structured binding declaration
By using the same _______ you can build relationships between data stored in two or more arrays.
subscript
To access an array element, use the array name and the element's
subscript
The range based for loop is designed to work with a built-in variable known as
the range variable
An element of a two-dimensional array is referred to by
the row subscript of the element followed by the column subscript of the element
An array can store a group of values, but the values must be
the same data type
Which statement correctly initializes a vector of ints named n with the values 10 and 20?
vector <int> n {10,20};
Which statement correctly defines a vector object for holding images?
vector <int> v;
If you leave out the size declarator in an array definition?
you must furnish an initialization