From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001 From: Sven Eisenhauer Date: Fri, 10 Nov 2023 15:11:48 +0100 Subject: add new repo --- Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.cpp | 137 +++++++++++++++++++++ Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.h | 49 ++++++++ .../Prog1/examples/ch08/Fig08_10_12/Fig08_12.cpp | 54 ++++++++ 3 files changed, 240 insertions(+) create mode 100644 Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.cpp create mode 100644 Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.h create mode 100644 Bachelor/Prog1/examples/ch08/Fig08_10_12/Fig08_12.cpp (limited to 'Bachelor/Prog1/examples/ch08/Fig08_10_12') diff --git a/Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.cpp b/Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.cpp new file mode 100644 index 0000000..0c96a95 --- /dev/null +++ b/Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.cpp @@ -0,0 +1,137 @@ +// Fig. 8.11: date1.cpp +// Date class member function definitions. +#include +#include "date1.h" + +// initialize static member at file scope; +// one class-wide copy +const int Date::days[] = + { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; + +// Date constructor +Date::Date( int m, int d, int y ) +{ + setDate( m, d, y ); + +} // end Date constructor + +// set month, day and year +void Date::setDate( int mm, int dd, int yy ) +{ + month = ( mm >= 1 && mm <= 12 ) ? mm : 1; + year = ( yy >= 1900 && yy <= 2100 ) ? yy : 1900; + + // test for a leap year + if ( month == 2 && leapYear( year ) ) + day = ( dd >= 1 && dd <= 29 ) ? dd : 1; + else + day = ( dd >= 1 && dd <= days[ month ] ) ? dd : 1; + +} // end function setDate + +// overloaded preincrement operator +Date &Date::operator++() +{ + helpIncrement(); + + return *this; // reference return to create an lvalue + +} // end function operator++ + +// overloaded postincrement operator; note that the dummy +// integer parameter does not have a parameter name +Date Date::operator++( int ) +{ + Date temp = *this; + helpIncrement(); // hold current state of object + + // return unincremented, saved, temporary object + return temp; // value return; not a reference return + +} // end function operator++ + +// add specified number of days to date +const Date &Date::operator+=( int additionalDays ) +{ + for ( int i = 0; i < additionalDays; i++ ) + helpIncrement(); + + return *this; // enables cascading + +} // end function operator+= + +// if the year is a leap year, return true; +// otherwise, return false +bool Date::leapYear( int testYear ) const +{ + if ( testYear % 400 == 0 || + ( testYear % 100 != 0 && testYear % 4 == 0 ) ) + return true; // a leap year + else + return false; // not a leap year + +} // end function leapYear + +// determine whether the day is the last day of the month +bool Date::endOfMonth( int testDay ) const +{ + if ( month == 2 && leapYear( year ) ) + return testDay == 29; // last day of Feb. in leap year + else + return testDay == days[ month ]; + +} // end function endOfMonth + +// function to help increment the date +void Date::helpIncrement() +{ + // day is not end of month + if ( !endOfMonth( day ) ) + ++day; + + else + + // day is end of month and month < 12 + if ( month < 12 ) { + ++month; + day = 1; + } + + // last day of year + else { + ++year; + month = 1; + day = 1; + } + +} // end function helpIncrement + +// overloaded output operator +ostream &operator<<( ostream &output, const Date &d ) +{ + static char *monthName[ 13 ] = { "", "January", + "February", "March", "April", "May", "June", + "July", "August", "September", "October", + "November", "December" }; + + output << monthName[ d.month ] << ' ' + << d.day << ", " << d.year; + + return output; // enables cascading + +} // end function operator<< + +/************************************************************************** + * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice * + * Hall. All Rights Reserved. * + * * + * DISCLAIMER: The authors and publisher of this book have used their * + * best efforts in preparing the book. These efforts include the * + * development, research, and testing of the theories and programs * + * to determine their effectiveness. The authors and publisher make * + * no warranty of any kind, expressed or implied, with regard to these * + * programs or to the documentation contained in these books. The authors * + * and publisher shall not be liable in any event for incidental or * + * consequential damages in connection with, or arising out of, the * + * furnishing, performance, or use of these programs. * + *************************************************************************/ \ No newline at end of file diff --git a/Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.h b/Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.h new file mode 100644 index 0000000..d1d6148 --- /dev/null +++ b/Bachelor/Prog1/examples/ch08/Fig08_10_12/Date1.h @@ -0,0 +1,49 @@ +// Fig. 8.10: date1.h +// Date class definition. +#ifndef DATE1_H +#define DATE1_H +#include + +using std::ostream; + +class Date { + friend ostream &operator<<( ostream &, const Date & ); + +public: + Date( int m = 1, int d = 1, int y = 1900 ); // constructor + void setDate( int, int, int ); // set the date + + Date &operator++(); // preincrement operator + Date operator++( int ); // postincrement operator + + const Date &operator+=( int ); // add days, modify object + + bool leapYear( int ) const; // is this a leap year? + bool endOfMonth( int ) const; // is this end of month? + +private: + int month; + int day; + int year; + + static const int days[]; // array of days per month + void helpIncrement(); // utility function + +}; // end class Date + +#endif + +/************************************************************************** + * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice * + * Hall. All Rights Reserved. * + * * + * DISCLAIMER: The authors and publisher of this book have used their * + * best efforts in preparing the book. These efforts include the * + * development, research, and testing of the theories and programs * + * to determine their effectiveness. The authors and publisher make * + * no warranty of any kind, expressed or implied, with regard to these * + * programs or to the documentation contained in these books. The authors * + * and publisher shall not be liable in any event for incidental or * + * consequential damages in connection with, or arising out of, the * + * furnishing, performance, or use of these programs. * + *************************************************************************/ \ No newline at end of file diff --git a/Bachelor/Prog1/examples/ch08/Fig08_10_12/Fig08_12.cpp b/Bachelor/Prog1/examples/ch08/Fig08_10_12/Fig08_12.cpp new file mode 100644 index 0000000..0d4c996 --- /dev/null +++ b/Bachelor/Prog1/examples/ch08/Fig08_10_12/Fig08_12.cpp @@ -0,0 +1,54 @@ +// Fig. 8.12: fig08_12.cpp +// Date class test program. +#include + +using std::cout; +using std::endl; + +#include "date1.h" // Date class definition + +int main() +{ + Date d1; // defaults to January 1, 1900 + Date d2( 12, 27, 1992 ); + Date d3( 0, 99, 8045 ); // invalid date + + cout << "d1 is " << d1 << "\nd2 is " << d2 + << "\nd3 is " << d3; + + cout << "\n\nd2 += 7 is " << ( d2 += 7 ); + + d3.setDate( 2, 28, 1992 ); + cout << "\n\n d3 is " << d3; + cout << "\n++d3 is " << ++d3; + + Date d4( 7, 13, 2002 ); + + cout << "\n\nTesting the preincrement operator:\n" + << " d4 is " << d4 << '\n'; + cout << "++d4 is " << ++d4 << '\n'; + cout << " d4 is " << d4; + + cout << "\n\nTesting the postincrement operator:\n" + << " d4 is " << d4 << '\n'; + cout << "d4++ is " << d4++ << '\n'; + cout << " d4 is " << d4 << endl; + + return 0; + +} // end main + +/************************************************************************** + * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice * + * Hall. All Rights Reserved. * + * * + * DISCLAIMER: The authors and publisher of this book have used their * + * best efforts in preparing the book. These efforts include the * + * development, research, and testing of the theories and programs * + * to determine their effectiveness. The authors and publisher make * + * no warranty of any kind, expressed or implied, with regard to these * + * programs or to the documentation contained in these books. The authors * + * and publisher shall not be liable in any event for incidental or * + * consequential damages in connection with, or arising out of, the * + * furnishing, performance, or use of these programs. * + *************************************************************************/ -- cgit v1.2.3