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Chapter 8: Problem 9

If the size declarator of an array definition is omitted, C++ counts the number of items in the _________ to determine how large the array should be.

Short Answer

Expert verified
Answer: If the size declarator of an array definition is omitted, C++ counts the number of items in the initializer list to determine how large the array should be.

Step by step solution

01

Understanding Array Definition in C++

When defining an array in C++, the syntax is as follows: data_type array_name[size], where data_type is the type of elements in the array (e.g., int, float, etc.), array_name is the name of the array, and size is the number of elements in the array.
02

Omitting the Array Size Declarator

If the size declarator (the number inside the brackets) is omitted, C++ counts the number of elements in the initializer list provided while defining the array. The initializer list contains the initial values for the array elements, enclosed in curly braces and separated by commas.
03

Completing the Statement

To answer the given question, the statement should read: "If the size declarator of an array definition is omitted, C++ counts the number of items in the initializer list to determine how large the array should be."
04

Example

Consider the following example to understand the statement: ```cpp int numbers[] = {1, 2, 3, 4, 5}; ``` In this case, we have not provided the size declarator explicitly; instead, we have provided an initializer list. C++ counts the number of items in the initializer list (5 items in this case), and automatically creates an array of that size (5 elements).

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Most popular questions from this chapter

The _________ indicates the number of elements, or values, an array can hold.

Use the following car structure declaration to answer. struct Car string make, model ; int year ; double cost ; / / Constructors \(\operatorname{car}()\) \(\\{\text { make }=\text { model }=" " ; \text { year }=\operatorname{cost}=0 ; \\}\) Car (string mk, string md, int yr, double \(\\{\text { make }=\mathrm{mk} ; \text { model }=\mathrm{md} ; \text { year }=\mathrm{yr} ; \text { cost }=\mathrm{c} ;\\}\) Define an array named forsale that holds 35 car structures. Initialize the first three elements with the following data: $$\begin{array}{llcc} \text { Make } & \text { Model } & \text { Year } & \text { cost } \\ \text { Ford } & \text { Taurus } & 2006 & \$ 21,000 \\ \text { Honda } & \text { Accord } & 2004 & \$ 11,000 \\ \text { Jeep } & \text { Wrangler } & 2007 & \$ 24,000 \end{array}$$

A weather analysis program uses the following array to store the temperature for each hour of the day on each day of a week. int temp [7] [ 24 ] ; Each row represents a day \((0=\text { Sunday, } 1=\text { Monday, etc. })\) and each column represents a time \((0=\text { midnight }, 1=1 \text { a.m., } \ldots, 12=\text { noon, } 13=1 \text { p.m., etc. })\) A) Write code to find Tuesday's average temperature. B) Write code to find the average weekly noon temperature.

In a program you need to store the identification numbers of 10 employees (as ints) and their weekly gross pay (as doubles). A) Define two arrays that may be used in parallel to store the 10 employee identification numbers and 10 weekly gross pay amounts. B) Write a loop that uses these arrays to print each employee's identification number and weekly gross pay.

To pass an array to a function, pass the _________ of the array.
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