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Reimplement the digital clock from the preceding exercise, representing the time as the minutes from midnight. This makes the pulse member function very easy, but you have to work harder to recover the hours and minutes. For example, 100 minutes after midnight is 1 hour and 40 minutes. C++

Reimplement the digital clock from the preceding exercise, representing the time as the minutes from midnight. This makes the pulse member function very easy, but you have to work harder to recover the hours and minutes. For example, 100 minutes after midnight is 1 hour and 40 minutes. C++

Database System Concepts
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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Reimplement the digital clock from the preceding exercise, representing the time as the minutes from midnight. This makes the pulse member function very easy, but you have to work harder to recover the hours and minutes. For example, 100 minutes after midnight is 1 hour and 40 minutes.

C++

void Clock::pulse() { get_minutes++; if (get_minutes == 60) { get_minutes = 0; get_hours++; if (get_hours == 24) { get _hours = 0; } } 39 40 41 42 43 44 45 46 47 48 49 50 51 int Clock: :get_hours() const { return get_hours; } int Clock: :get_minutes() const 52 53 54 55 56 57 { return get_minutes; } 58 59 60 61 int main() 62 { Clock my_clock; my_clock.reset(); 63 64 for (int i = 0; i < 100; i++) { my_clock.pulse(); } cout « my_clock.get_hours() « endl; cout « "Expected: 1" « endl; cout « my_clock.get_minutes() « endl; cout « "Expected: 40" « endl; 65 66 67 68 69 70 for (int i = 0; i < 78; i++) { my_clock.pulse(); } cout « my_clock.get_hours() « endl; cout « "Expected: 2" « endl; cout « my_clock.get_minutes() « endl; cout « "Expected: 50" « endl; 71 72 << 73 74 75 76 for (int i = 0; i < 1270; i++) { my_clock.pulse(); } cout « my_clock.get_hours () « endl; cout « "Expected: 0" « endl; cout « my_clock.get_minutes() « endl; cout « "Expected: 0" « endl; 77 78 79 80 81 82 83 return e; 84 }
Transcribed Image Text:void Clock::pulse() { get_minutes++; if (get_minutes == 60) { get_minutes = 0; get_hours++; if (get_hours == 24) { get _hours = 0; } } 39 40 41 42 43 44 45 46 47 48 49 50 51 int Clock: :get_hours() const { return get_hours; } int Clock: :get_minutes() const 52 53 54 55 56 57 { return get_minutes; } 58 59 60 61 int main() 62 { Clock my_clock; my_clock.reset(); 63 64 for (int i = 0; i < 100; i++) { my_clock.pulse(); } cout « my_clock.get_hours() « endl; cout « "Expected: 1" « endl; cout « my_clock.get_minutes() « endl; cout « "Expected: 40" « endl; 65 66 67 68 69 70 for (int i = 0; i < 78; i++) { my_clock.pulse(); } cout « my_clock.get_hours() « endl; cout « "Expected: 2" « endl; cout « my_clock.get_minutes() « endl; cout « "Expected: 50" « endl; 71 72 << 73 74 75 76 for (int i = 0; i < 1270; i++) { my_clock.pulse(); } cout « my_clock.get_hours () « endl; cout « "Expected: 0" « endl; cout « my_clock.get_minutes() « endl; cout « "Expected: 0" « endl; 77 78 79 80 81 82 83 return e; 84 }
Tester.cpp 1 #include <iostream> 2 using namespace std; 3 /** A simulated digital clock. */ 4 6. class Clock 7 { public: /** 10 Sets the clock to 00:00. 11 */ 12 void reset (); 13 14 /** 15 Advances this clock to the next minute. 16 */ 17 void pulse(); 18 19 /** Gets the hours of this clock. ereturn the hours (between e and 23) */ int get hours() const; 20 21 22 23 24 25 /** 26 Gets the minutes of this clock. 27 @return the minutes (between e and 59) 28 29 int get_minutes() const; private: int minutes_from midnight; 30 31 32 }; 33 void Clock::reset () { get_hours - 0; get_minutes = 0; 34 35 36 37 38
Transcribed Image Text:Tester.cpp 1 #include <iostream> 2 using namespace std; 3 /** A simulated digital clock. */ 4 6. class Clock 7 { public: /** 10 Sets the clock to 00:00. 11 */ 12 void reset (); 13 14 /** 15 Advances this clock to the next minute. 16 */ 17 void pulse(); 18 19 /** Gets the hours of this clock. ereturn the hours (between e and 23) */ int get hours() const; 20 21 22 23 24 25 /** 26 Gets the minutes of this clock. 27 @return the minutes (between e and 59) 28 29 int get_minutes() const; private: int minutes_from midnight; 30 31 32 }; 33 void Clock::reset () { get_hours - 0; get_minutes = 0; 34 35 36 37 38
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