Chapter 7 Single-Dimensional Arrays in C++
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Questions and Answers

In C++ programming, why is it preferred to use arrays when handling similar types of data?

  • To store data in consecutive memory locations for easy access. (correct)
  • To reduce the size of the program file.
  • To make the code more readable and organized.
  • To enable storing non-homogeneous data types efficiently.
  • 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?

  • 2012
  • 2008 (correct)
  • 2016
  • 2006
  • Why is it not practical to store marks of 100 students using individual variables in C++?

  • It uses too much memory space.
  • It requires writing repetitive code which is time-consuming. (correct)
  • It results in slower program execution time.
  • It makes the code harder to understand and maintain.
  • 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'?

    <p>40 bytes</p> Signup and view all the answers

    What does it mean when it is said that all elements of an array are stored in consecutive memory locations?

    <p>It allows for easy access to any element in the array.</p> Signup and view all the answers

    Which type of data can be efficiently stored using arrays in C++ programming?

    <ul> <li>Data with the same data type</li> </ul> Signup and view all the answers

    What happens if an array is declared without being initialized?

    <p>It will contain a random garbage value</p> Signup and view all the answers

    When can an array be initialized in C++?

    <p>Both during compile time and runtime</p> Signup and view all the answers

    In C++, how is the size of an array determined if it is initialized with elements?

    <p>The size is determined by the number of elements given in the initialization</p> Signup and view all the answers

    What does 'LB' represent in the calculation of an element's address in a 1-D Array?

    <p>Lower Bound of subscript</p> Signup and view all the answers

    When is it necessary to define the size of arrays during initialization?

    <p>It is never necessary to define the size during initialization</p> Signup and view all the answers

    How can you provide initial values to an array in C++?

    <p>By manually specifying the values in the code itself</p> Signup and view all the answers

    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.

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