Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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[画像:When using structures you can enforce invariants by using functions to change your data. Complete the two functions setHours and setMinutes which modify their data element. If the value would make the Time object invalid, then throw an invalid_argument exception, using a message like 24 is invalid for hours. udts.cpp 1 #include <string> 2 #include <stdexcept> 3 #include "time.h" 4 using namespace std; 6 /** Set the hours in a Time object. @param t the Time object to modify. @param h the hours to change it to. @exception throw invalid_ argument if h is out of range. 7 8. 9. 10 11 */ void setHours (Time& t, int h) { 12 13 14 15 16 17 } 18 19 /** Set the minutes in a Time object. @param t the Time object to modify. @param m the minutes to change it to. @exception throw invalid_argument if m is out of range. */ void setMinutes (Time& t, int m) { 20 21 22 23 24 25 26 27 28 29 30 } ]
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Transcribed Image Text:When using structures you can enforce invariants by using functions to change your data. Complete the two functions setHours and setMinutes which modify their data element. If the value would make the Time object invalid, then throw an invalid_argument exception, using a message like 24 is invalid for hours. udts.cpp 1 #include <string> 2 #include <stdexcept> 3 #include "time.h" 4 using namespace std; 6 /** Set the hours in a Time object. @param t the Time object to modify. @param h the hours to change it to. @exception throw invalid_ argument if h is out of range. 7 8. 9. 10 11 */ void setHours (Time& t, int h) { 12 13 14 15 16 17 } 18 19 /** Set the minutes in a Time object. @param t the Time object to modify. @param m the minutes to change it to. @exception throw invalid_argument if m is out of range. */ void setMinutes (Time& t, int m) { 20 21 22 23 24 25 26 27 28 29 30 }
[画像:Tester.cpp 1 #include <iostream> 2 #include <string> 3 #include "time.h" 4 using namespace std; int main() { Time t; setHours (t, 23); cout « t « endl; cout « "Expected: 23:00" <« endl; setMinutes (t, 59); cout « t « endl; cout « "Expected: 23:59" « endl; try { setMinutes (t, -2); cout « t « endl; } catch (invalid_argument& e) { cout « e.what () « endl; б 7 8 10 11 12 13 14 15 16 17 18 19 20 cout « "Expected: -2 is invalid for minutes" « endl; cout «t « endl; // should stil be 23:59 cout « "Expected: 23:59" « endl; try { setHours (t, 24); cout «t « endl; } catch (invalid_argument& e) { cout « e.what () « endl; } cout « "Expected: 24 is invalid for hours" « endl; cout « t « endl; cout « "Expected: 23:59" « endl; } 21 22 23 24 25 26 27 28 29 30 31 // should still be 23:59 32 33 ]
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Transcribed Image Text:Tester.cpp 1 #include <iostream> 2 #include <string> 3 #include "time.h" 4 using namespace std; int main() { Time t; setHours (t, 23); cout « t « endl; cout « "Expected: 23:00" <« endl; setMinutes (t, 59); cout « t « endl; cout « "Expected: 23:59" « endl; try { setMinutes (t, -2); cout « t « endl; } catch (invalid_argument& e) { cout « e.what () « endl; б 7 8 10 11 12 13 14 15 16 17 18 19 20 cout « "Expected: -2 is invalid for minutes" « endl; cout «t « endl; // should stil be 23:59 cout « "Expected: 23:59" « endl; try { setHours (t, 24); cout «t « endl; } catch (invalid_argument& e) { cout « e.what () « endl; } cout « "Expected: 24 is invalid for hours" « endl; cout « t « endl; cout « "Expected: 23:59" « endl; } 21 22 23 24 25 26 27 28 29 30 31 // should still be 23:59 32 33
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