C++大学教程第五版课后答案(第10、11章).docx

10.07Date类定义：#ifndef DATE_H#define DATE_H#include using std:string;class Date public: Date(); / default constructor uses functions to set date Date( int, int ); / constructor using ddd yyyy format Date( int, int, int ); / constructor using dd/mm/yy format Date( string, int, int ); / constructor using Month dd, yyyy format void setDay( int ); / set the day void setMonth( int ); / set the month void print() const; / print date in month/day/year format void printDDDYYYY() const; / print date in ddd yyyy format void printMMDDYY() const; / print date in mm/dd/yy format void printMonthDDYYYY() const; / print date in Month dd, yyyy format Date(); / provided to confirm destruction orderprivate: int month; / 1-12 (January-December) int day; / 1-31 based on month int year; / any year / utility functions int checkDay( int ) const; /check if day is proper for month and year int daysInMonth( int ) const; / returns number of days in given month bool isLeapYear() const; / indicates whether date is in a leap year int convertDDToDDD() const; / get 3-digit day based on month and day void setMMDDFromDDD( int ); / set month and day based on 3-digit day string convertMMToMonth( int ) const; / convert mm to month name void setMMFromMonth( string ); / convert month name to mm int convertYYYYToYY() const; / get 2-digit year based on 4-digit year void setYYYYFromYY( int ); / set year based on 2-digit year; / end class Date#endif类成员函数：#include using std:cout;using std:endl;#include using std:setw;using std:setfill;#include using std:time;using std:localtime;using std:tm;using std:time_t;#include Date.h / include Date class definition/ default constructor that sets date using functionsDate:Date() / pointer of type struct tm which holds calendar time components struct tm *ptr; time_t t = time( 0 ); / determine current calendar time / convert current calendar time pointed to by t into / broken down time and assign it to ptr ptr = localtime( &t ); day = ptr-tm_mday; / broken down day of month month = 1 + ptr-tm_mon; / broken down month since January year = ptr-tm_year + 1900; / broken down year since 1900 / end Date constructor/ constructor that takes date in ddd yyyy formatDate:Date( int ddd, int yyyy ) year = yyyy; / could validate setMMDDFromDDD( ddd ); / set month and day based on ddd / end Date constructo/ constructor that takes date in mm/dd/yy formatDate:Date( int mm, int dd, int yy ) setYYYYFromYY( yy ); / set 4-digit year based on yy setMonth( mm ); / validate and set the month setDay( dd ); / validate and set the day / end Date constructor/ constructor that takes date in Month dd, yyyy formatDate:Date( string monthName, int dd, int yyyy ) setMMFromMonth( monthName ); / set month based on month name setDay( dd ); / validate and set the day year = yyyy; / could validate / end Date constructor/ validate and store the dayvoid Date:setDay( int d ) day = checkDay( d ); / validate the day / end function setDay/ validate and store the monthvoid Date:setMonth( int m ) if ( m 0 & m = 12 ) / validate the month month = m; else month = 1; / invalid month set to 1 cout Invalid month ( m ) set to 1.n; / end else / end function setMonth/ print Date object in form: month/day/yearvoid Date:print() const cout month / day / year endl; / end function print/ print Date object in form: ddd yyyyvoid Date:printDDDYYYY() const cout convertDDToDDD() year endl; / end function printDDDYYYY/ print Date object in form: mm/dd/yyvoid Date:printMMDDYY() const cout setw( 2 ) setfill( 0 ) month / setw( 2 ) setfill( 0 ) day / setw( 2 ) setfill( 0 ) convertYYYYToYY() endl; / end function printMMDDYY/ print Date object in form: Month dd, yyyyvoid Date:printMonthDDYYYY() const cout convertMMToMonth( month ) day , year endl; / end function printMonthDDYYYY/ output Date object to show when its destructor is calledDate:Date() cout Date object destructor for date ; print(); cout 0 & testDay = daysInMonth( month ) ) return testDay; / February 29 check for leap year if ( month = 2 & testDay = 29 & isLeapYear() ) return testDay; cout Invalid day ( testDay ) set to 1.n; return 1; / leave object in consistent state if bad value / end function checkDay/ return the number of days in a monthint Date:daysInMonth( int m ) const if ( isLeapYear() & m = 2 ) return 29; static const int daysPerMonth 13 = 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ; return daysPerMonth m ; / end function daysInMonth/ test for a leap yearbool Date:isLeapYear() const if ( year % 400 = 0 | ( year % 4 = 0 & year % 100 != 0 ) ) return true; else return false; / end function isLeapYear/ calculate 3-digit day based on Date objects current month and dayint Date:convertDDToDDD() const int ddd = 0; / for each month that has passed, add days to ddd for ( int i = 1; i month; i+ ) ddd += daysInMonth( i ); / add days from current month ddd += day; return ddd; / end function convertDDToDDD/ set month and day based on 3-digit dayvoid Date:setMMDDFromDDD( int ddd ) int dayTotal = 0; int m; for ( m = 1; m = 12 & ( dayTotal + daysInMonth( m ) ) ddd; m+ ) dayTotal += daysInMonth( m ); setMonth( m ); setDay( ddd - dayTotal ); / end function setMMDDFromDDD / utility function to convert month number to month namestring Date:convertMMToMonth( int mm ) const static const string months = , January, February, March, April, May, June, July, August, September, October, November, December ; return months mm ; / end function convertMMToMonth/ set month number based on month name void Date:setMMFromMonth( string m ) bool matchFound = false; / loop for each month, checking for a match for ( int i = 1; i = 12 & !matchFound; i+ ) string tempMonth = convertMMToMonth( i ); if ( tempMonth = m ) setMonth( i ); matchFound = true; / end if / end for if ( !matchFound ) cout Invalid month name ( month = 2000 ? year - 2000 : year - 1900 ); / end function convertYYYYtoYY/ utility function to convert 2-digit year to 4-digit yearvoid Date:setYYYYFromYY( int yy ) / if yy is less than 7, assume its in the 2000s / if yy is greater than or equal to 7, assume its in the 1900s year = ( yy 7 ? yy + 2000 : yy + 1900 ); / end function setYYYYFromYY测试函数：#include using std:cout; using std:endl; #include Date.h / include Date class definitionint main() Date date1( 256, 1999 ); / initialize using ddd yyyy format Date date2( 3, 25, 04 ); / initialize using mm/dd/yy format Date date3( September, 1, 2000 ); / month dd, yyyy format Date date4; / initialize to current date with default constructor / print Date objects in default format date1.print(); date2.print(); date3.print(); date4.print(); cout n; / print Date objects in ddd yyyy format date1.printDDDYYYY(); date2.printDDDYYYY(); date3.printDDDYYYY(); date4.printDDDYYYY(); cout n; / print Date objects in mm/dd/yy format date1.printMMDDYY(); date2.printMMDDYY(); date3.printMMDDYY(); date4.printMMDDYY(); cout n; / print Date objects in month d, yyyy format date1.printMonthDDYYYY(); date2.printMonthDDYYYY(); date3.printMonthDDYYYY(); date4.printMonthDDYYYY(); cout = 0.0 ? b : 0.0 ); / end SavingsAccount constructor void calculateMonthlyInterest();/calculate interest;add to balance static void modifyInterestRate( double ); void printBalance() const;private: double savingsBalance; / the account balance static double annualInterestRate; / the interest rate of all accounts; / end class SavingsAccount#endif类成员函数：#include using std:cout; using std:fixed;#include using std:setprecision; #include SavingsAccount.h / SavingsAccount class definition/ initialize static data memberdouble SavingsAccount:annualInterestRate = 0.0;/ calculate monthly interest for this savings accountvoid SavingsAccount:calculateMonthlyInterest() savingsBalance += savingsBalance * ( annualInterestRate / 12.0 ); / end function calculateMonthlyInterest/ function for modifying static member variable annualInterestRatevoid SavingsAccount:modifyInterestRate( double i ) annualInterestRate = ( i = 0.0 & i = 1.0 ) ? i : 0.03; / end function modifyInterestRate/ prints balance of the savings accountvoid SavingsAccount:printBalance() const cout fixed $ setprecision( 2 ) savingsBalance; / end function printBalance 测试函数：#include using std:cout;using std:endl;#include using std:setw; #include SavingsAccount.h / SavingsAccount class definitionint main() SavingsAccount saver1( 2000.0 ); SavingsAccount saver2( 3000.0 ); SavingsAccount:modifyInterestRate( .03 ); / change interest rate cout Initial balances:nSaver 1: ; saver1.printBalance(); cout tSaver 2: ; saver2.printBalance(); saver1.calculateMonthlyInterest(); saver2.calculateMonthlyInterest(); cout nnBalances after 1 months interest applied at .03:n Saver 1: ; saver1.printBalance(); cout tSaver 2: ; saver2.printBalance(); SavingsAccount:modifyInterestRate( .04 ); / change interest rate saver1.calculateMonthlyInterest(); saver2.calculateMonthlyInterest(); cout nnBalances after 1 months interest applied at .04:n Saver 1: ; saver1.printBalance(); cout tSaver 2: ; saver2.printBalance(); cout = 0 & x = 100 ); / end function validEntry; / end class IntegerSet#endif 类成员函数：#include using std:cout; using std:cin; using std:cerr;#include using std:setw; #include IntegerSet.h / IntegerSet class definition/ constructor creates a set from array of integersIntegerSet:IntegerSet( int array, int size) emptySet(); for ( int i = 0; i size; i+ ) insertElement( array i ); / end IntegerSet constructor/ initializes a set to the empty setvoid IntegerSet:emptySet() for ( int y = 0; y 101; y+ ) set y = 0; / end function emptySet/ input a set from the uservoid IntegerSet:inputSet() int number; do cout number; if ( validEntry( number ) ) set number = 1; else if ( number != -1 ) cerr Invalid Elementn; while ( number != -1 ); / end do.while cout Entry completen; / end function inputSet/ prints the set to the output streamvoid IntegerSet:printSet() const int x = 1; bool empty = true; / assume set is empty cout ; for (int u = 0; u 101; u+ ) if ( set u ) cout setw( 4 ) u ( x % 10 = 0 ? n : ); empty = false; / set is not empty x+; / end if / end for if ( empty ) cout setw( 4 ) -; / display an empty set cout setw( 4 ) n; / end function printSet/ returns the union of two setsIntegerSet IntegerSet:unionOfSets( const IntegerSet &r ) IntegerSet temp; / if element is in either set, add to temporary set for ( int n = 0; n 101; n+ ) if ( set n = 1 | r.set n = 1 ) temp.set n = 1; return temp; / end function unionOfSets/ returns the intersection of two setsIntegerSet IntegerSet:intersectionOfSets( const IntegerSet &r ) IntegerSet temp; / if element is in both sets, add to temporary set for ( int w = 0; w 101; w+ ) if ( set w = 1 & r.set w = 1 ) temp.set w = 1; return temp; / end function intersectionOfSets/ insert a new integer into this setvoid IntegerSet:insertElement( int k ) if ( validEntry( k ) ) set k = 1; else cerr Invalid insert attempted!n; / end function insertElement/ removes an integer from this setvoid IntegerSet:deleteElement( int m ) if ( validEntry( m ) ) set m = 0; else cerr Invalid delete attempted!n; / end function deleteElement/ determines if two sets are equalbool IntegerSet:isEqualTo( const IntegerSet &r ) const for ( int v = 0; v 101; v+ ) if ( set v != r.set v ) return false; / sets are not-equal return true; / sets are equal / end function isEqualTo测试函数：#include using std:cout; using std:endl; #include IntegerSet.h / IntegerSet class definitionint main() IntegerSet a; IntegerSet b; IntegerSet c; IntegerSet d; cout Enter set A:n; a.inputSet(); cout nEnter set B:n; b.inputSet(); c = a.unionOfSets( b ); d = ersectionOfSets( b ); cout nUnion of A and B is:n; c.printSet(); cout Intersection of A and B is:n; d.printSet(); if ( a.isEqualTo( b ) ) cout Set A is equal to set Bn; else cout Set A is not equal to set Bn; cout nInserting 77 into set A.n; a.insertElement( 77 ); cout Set A is now:n; a.printSet(); cout nDeleting 77 from set A.n; a.deleteElement( 77 ); cout Set A is now:n; a.printSet(); const int arraySize = 10; int intArray arraySize = 25, 67, 2, 9, 99, 105, 45, -5, 100, 1 ; IntegerSet e( intArray, arraySize ); cout nSet E is:n; e.printSet(); cout endl; return 0; / end main10.10Time类定义：#ifndef TIME_H#define TIME_Hclass Time public: Time( int = 0, int = 0, int = 0 ); / default constructor / set functions (the Time & return types enable cascading) Time &setTime( int, int, int ); / set hour, minute, second Time &setHour( int ); / set hour Time &setMinute( int ); / set minute Time &setSecond( int ); / set second / get functions (normally declared const) int getHour() const; / return hour int getMinute() const; / return minute int getSecond() const; / return second / print functions (normally declared const) void printUniversal() const; / print universal time void printStandard() const; / print standard timeprivate: int totalSeconds; / number of seconds since midnight; / end class Time#endif类成员函数：#include using std:cout;#include using std:setfill;using std:setw;#include Time.h / Time class definition/ constructor function to initialize private data;/ calls member function setTime to set variables;/ default va