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Questions and Answers
What must be true about all elements in an array?
What must be true about all elements in an array?
What is the consequence of using an out-of-bounds index in an array?
What is the consequence of using an out-of-bounds index in an array?
Which statement correctly describes how arrays are created in C++?
Which statement correctly describes how arrays are created in C++?
How are elements in an array accessed in C++?
How are elements in an array accessed in C++?
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Which declaration correctly initializes an array of integers?
Which declaration correctly initializes an array of integers?
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Study Notes
Arrays
- Arrays are linear data structures
- Used to store elements of the same data type
- Arrays are created at compile-time with a fixed size
- Elements are stored in contiguous memory locations
Array Declaration
-
int numbers[10];declares an array namednumbersto hold 10 integers -
const int MAX = 10;declares a constantMAXwith a value of 10 -
#define MAX 10defines a pre-processor constantMAXwith a value of 10
Array Initialization
- By default, local arrays are not initialized
- Arrays of types
int, char, floatetc., elements have undetermined values - Class type arrays (e.g.,
std::string) will have elements initialized by the class's default constructor
Array Access
- Elements are accessed using the
[index]notation - Indexes are 0-based, meaning the first element has an index of 0
- It is the developer's responsibility to ensure indexes are within bounds
- Out-of-bounds access is a runtime error that may lead to crashes
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Description
This quiz covers the fundamental concepts of arrays in programming, including their structure, declaration, initialization, and access methods. Test your understanding of how arrays function as linear data structures and the rules for working with them.
