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 wou make the Time object invalid, then throw an invalid_argument exception, using a message lik 24 is invalid for hours. udts.cpp 1 #include 2 #include 3 #include "time.h" 4 using namespace std; 7 8. 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. 10 11 12 void setHours(Time& t, int h) 13 { 14 15 16 17 } 18 19 20 21 22 23 24 25 void setMinutes (Time& t, int m) 26 { 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. 27 28 29 30 }
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 wou make the Time object invalid, then throw an invalid_argument exception, using a message lik 24 is invalid for hours. udts.cpp 1 #include 2 #include 3 #include "time.h" 4 using namespace std; 7 8. 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. 10 11 12 void setHours(Time& t, int h) 13 { 14 15 16 17 } 18 19 20 21 22 23 24 25 void setMinutes (Time& t, int m) 26 { 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. 27 28 29 30 }
Computer Networking: A Top-Down Approach (7th Edition)
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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.
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8.
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*/
void setHours (Time& t, int h)
{
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}
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/**
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)
{
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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
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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;
}
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// should still be 23:59
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