Look at the code below and use the following comments to indicate the scope of the static variables or functions. Place the comment below the relevant line. Module scope Class scope Function scope The code runs. Use onlinegdb.com to see it run. Module scope means global but only known in this source file. Class scope means global but only known by the class. Function scope means global but only known in the function. Code: #include 2 3 static const int MAX_SIZE=10; 4 5 // Return the max value 6 static double max(double d1) 7 { 8 static double lastMax = 0; 9 lastMax = (d1 > lastMax) ? d1 : lastMax; 10 return lastMax; 11 } 12 13 // Singleton class only one instance allowed 14 class Singleton 15 { 16 public: 17 static Singleton& getSingleton() { return theOne; } 18 // Returns the Singleton 19 20 friend std::ostream& operator<< (std::ostream& o, const Singleton& s); 21 private: 22 Singleton() { }; 23 // Prevents more instances 24 25 static Singleton theOne; 26 }; 27 Singleton Singleton::theOne; 28 29 30 int main() 31 { 32 static Singleton& s = Singleton::getSingleton(); 33 double array[MAX_SIZE] = { 1.1, 5.5, 3.3, 7.7, 4.4, 9.9, 2.2, 6.6, 8.8, 0 }; 34 35 for (double maxVal : array) 36 std::cout << "max: " << max(maxVal) << std::endl; 37 38 std::cout << s; 39 return 0; 40 } 41 42 // insertion operator<< 43 std::ostream& operator<< (std::ostream& o, const Singleton& s) 44 { 45 o << "Output Singleton\n"; 46 }

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Need help with C++ Question

Look at the code below and use the following comments to indicate the scope of the static variables or functions. Place the comment below the relevant line.

Module scope
Class scope
Function scope

The code runs. Use onlinegdb.com to see it run. Module scope means global but only known in this source file. Class scope means global but only known by the class. Function scope means global but only known in the function.

Code:

#include <iostream>
2
3	static const int MAX_SIZE=10;
4
5	// Return the max value
6	static double max(double d1)
7	{
8	static double lastMax = 0;
9	lastMax = (d1 > lastMax) ? d1 : lastMax;
10	return lastMax;
11	}
12
13	// Singleton class only one instance allowed
14	class Singleton
15	{
16	public:
17	static Singleton& getSingleton() { return theOne; }
18	// Returns the Singleton
19
20	friend std::ostream& operator<< (std::ostream& o, const Singleton& s);
21	private:
22	Singleton() { };
23	// Prevents more instances
24
25	static Singleton theOne;
26	};
27	Singleton Singleton::theOne;
28
29
30	int main()
31	{
32	static Singleton& s = Singleton::getSingleton();
33	double array[MAX_SIZE] = { 1.1, 5.5, 3.3, 7.7, 4.4, 9.9, 2.2, 6.6, 8.8, 0 };
34
35	for (double maxVal : array)
36	std::cout << "max: " << max(maxVal) << std::endl;
37
38	std::cout << s;
39	return 0;
40	}
41
42	// insertion operator<<
43	std::ostream& operator<< (std::ostream& o, const Singleton& s)
44	{
45	o << "Output Singleton\n";
46	}
47

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