wex3_10.cpp

数据结构C++代码,经典代码,受益多多,希望大家多多支持

#include <iostream.h>
#include <string.h>
#include <strstream.h> 
#include <stdlib.h>

class Date
{   
    private:
        // private members that specify the date
        int month, day, year;
    public:
        // constructors. default date is January 1, 1900
        Date (int m = 1, int d = 1, int y = 0);
        Date (char *dstr);
        
        // output the date in the format "month day, year"
        void PrintDate (void);
        Date IncrementDate(int n) const;
};

// constructor. month, day, year given as integer values mm dd yy
Date::Date (int m, int d, int y) : month(m), day(d)
{
    year = 1900 + y;    // y is a year in the 20th century
}

// constructor. month, day, year given as string "mm/dd/yy"
Date::Date (char *dstr)
{
    char inputBuffer[16];
    char ch;

    // copy string to inputBuffer and declare an array based input stream
    strcpy(inputBuffer,dstr);
    istrstream input(inputBuffer, sizeof(inputBuffer));

    // read from input stream. use ch to read the '/' characters
    input >> month >> ch >> day >> ch >> year;
    year += 1900;
}

// print date with full month name.
void Date::PrintDate (void)
{
    // allocate static array of month names. Index 0 is NULL string.
    static char *Months[] = {"","January","February","March","April",
                             "May","June", "July","August", "September",
                             "October","November","December"}; 

    cout << Months[month] << " " << day << ", " << year;
}

int IsLeapYear(int y)
{
	if (y % 4 != 0 || (y % 100 == 0 && y % 100 != 0))
		return 0;
	else	
		return 1;
}

Date Date::IncrementDate(int n) const
{
	int tempday;
	int daysInMonth[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
	Date d(month,day,year-1900);		// has same date as current object
	
	if (n < 0 || n > 365)
	{
		cerr << "Increment " << n <<  " is out of range" << endl;
		exit(1);
	}
	
	if (month > 1)					// current month after January
	{
		if (IsLeapYear(year+1))
			daysInMonth[2] = 29;	// next year is a leap year
	}
	else
		if (IsLeapYear(year))
			daysInMonth[2] = 29;	// current year is a leap year 
			
	
	tempday = day + n;
		
	while(tempday > daysInMonth[d.month])
	{
		tempday -= daysInMonth[d.month];
		if(d.month != 12)			// current month not December
			d.month++;
		else
		{
			d.year++;
			d.month = 1;			// set month to January of next year
		}
	}
	d.day = tempday;
	return d;
}

			 
void main(void)
{
	Date d1(1,10,92), d2(1,10,93), d3(12,1,92), d4(12,1,91);
	Date d;
	
	d = d1.IncrementDate(50);   d.PrintDate(); cout << endl;
	d = d2.IncrementDate(50);   d.PrintDate(); cout << endl;
	d = d3.IncrementDate(91);   d.PrintDate(); cout << endl;
	d = d4.IncrementDate(91);   d.PrintDate(); cout << endl;
}

/*
<Run>

February 29, 1992
March 1, 1993
March 2, 1993
March 1, 1992
*/