C++程序设计(第2版)课后习题答案--第13章-白红宇

C++程序设计(第2版)课后习题答案--第13章

阅读量：5735 次

发布时间：2019-06-18

本文共 2804 字，大约阅读时间需要 9 分钟。

P317,13.3

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1 #include 
      
        2 #include 
       
         3 using namespace std; 4  5 static char daytable[2][13]={ 6     {
    0,31,28,31,30,31,30,31,31,30,31,30,31}, 7     {
    0,31,29,31,30,31,30,31,31,30,31,30,31} 8 }; 9 class Date10 {    11     //重载为友元12     //friend Date & operator+(Date &date,int d);13     friend ostream & operator<<(ostream &output,Date &d);14 public:15     Date();16     Date(int y,int m,int d);17     ~Date();18     //重载为成员函数19     Date & operator+(int d);20     static int isLeap(int y);21     22 protected:23     int year,month,day;24 };25 26 Date::Date()27 {28     year=2013;29     month=3;30     day=25;31 }32 33 Date::Date(int y,int m,int d)34 {35     year=y;36     month=m;37     day=d;38 }39 40 int Date::isLeap(int y)41 {42     return (y%4==0 && y%100 || y%400==0);43 }44 45 Date::~Date()46 {}47 48 Date & Date::operator+(int d)49 {50     while(day+d>daytable[isLeap(year)][month])51     {52         d-=daytable[isLeap(year)][month]-day;53         if(month==12)54         {55             year++;56             month=1;57         }58         else59             month++;60         day=0;61     }62     day+=d;63     64     return *this;65 }66 67 68 ostream & operator<<(ostream &output,Date &d)69 {70     output<
        
         <<"-"<
         
          <<"-"<
          
           <
           
            daytable[Date::isLeap(date.year)][date.month])78 {79 d-=daytable[Date::isLeap(date.year)][date.month]-date.day;80 if(date.month==12)81 {82 date.year++;83 date.month=1;84 }85 else86 date.month++;87 date.day=0;88 }89 date.day+=d;90 return date;91 }*/92 93 void main()94 {95 Date d(2013,3,25);96 d=d+365;97 cout<

P317,13.7

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1 #include 
      
        2 #include 
       
         3 //#include 
        
          4 using namespace std; 5  6 class Time 7 { 8     friend ostream & operator<<(ostream &output,Time &time); 9     friend istream & operator>>(istream &input,Time &time);10 public:11     Time(int h=0,int m=0,int s=0);12 private:13     int hour,minute,second;14 };15 16 Time::Time(int h,int m,int s)17 {18     hour=(h>=0 && h<=23)?h:0;19     minute=(m>=0 && m<=59)?m:0;20     second=(s>=0 && s<=59)?s:0;21 }22 23 ostream & operator<<(ostream &output,Time &time)24 {25     output<
         
          <
          
           <
           
            <<":"26 <
            
             <
             
              <
              
               <<":"27 <
               
                <
                
                 <
                 
                  <
                  
                   >(istream &input,Time &time)33 {34 char buffer[81];35 input.getline(buffer,3,'-');36 time.hour=atoi(buffer);37 input.getline(buffer,3,'-');38 time.minute=atoi(buffer);39 input.getline(buffer,3,'\n');40 time.second=atoi(buffer);41 return input;42 }43 44 void main(void)45 {46 Time time(12,36,25);47 cout<<"hh-mm-ss:"<
                   
                    >time;49 cout<