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Questions and Answers
In C++ programming, why is it preferred to use arrays when handling similar types of data?
If an array named 'numbers' has a size of 8 and the first element is at memory address 2000, what will be the memory address of the fourth element?
Why is it not practical to store marks of 100 students using individual variables in C++?
If each element in an array occupies 4 bytes of memory, and an array 'values' has a size of 10, what is the total memory allocated for the array 'values'?
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What does it mean when it is said that all elements of an array are stored in consecutive memory locations?
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Which type of data can be efficiently stored using arrays in C++ programming?
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What happens if an array is declared without being initialized?
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When can an array be initialized in C++?
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In C++, how is the size of an array determined if it is initialized with elements?
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What does 'LB' represent in the calculation of an element's address in a 1-D Array?
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When is it necessary to define the size of arrays during initialization?
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How can you provide initial values to an array in C++?
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Study Notes
Arrays in C++ Programming
- In C++ programming, arrays are used to handle similar types of data, such as storing marks of 100 students.
- An array is a sequence of data items of the same type, stored in consecutive memory locations in RAM.
- Each element of an array is of the same data type and can be accessed using the same name.
Types of Arrays
- There are three types of arrays.
Array Elements
- The first element of an array is numbered 0.
- Each element of an array can be accessed and used according to the need of the program.
- The size of an array is determined by the number of elements multiplied by the size of the data type.
Declaring Array Variables
- The syntax for declaring an array is:
datatype arrayName[arraySize]; - The array size must be a constant expression.
- Example:
double myList[5];
Initializing Arrays
- An array must be initialized after declaration to prevent garbage values.
- Arrays can be initialized at compile time or runtime.
- Initialization can be done at declaration time using:
int age = {2, 4, 34, 3, 4}; - The size of the array can be determined by the compiler during initialization if not specified.
Address of Array Elements
- The address of an element in a 1-D array can be calculated using:
Address of A[I] = B + W * (I – LB) - Where:
- I = Subset of element whose address is to be found
- B = Base address
- W = Storage size of one element in bytes
- LB = Lower Limit/Lower Bound of subscript (assumed to be zero if not specified)
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Description
Learn about handling similar types of data in C++ programming using arrays. Understand how to store and manipulate data efficiently using arrays, rather than creating individual variables. Explore the concept of arrays as a sequence of homogeneous data items.
