Category : C++ Source Code
Archive   : CPPTUT.ZIP
Filename : DATE.CPP

 
Output of file : DATE.CPP contained in archive : CPPTUT.ZIP
// Chapter 5 - Program 11

// This file contains the implementation for the date class.

#include // Prototype for sprintf
#include // Prototypes for the current date
#include "date.h"

char date::format; // This defines the static data member
char date::out_string[25]; // This defines the static string

// Constructor - Set date to current date, and
// set format to the default of 1
date::date(void)
{
time_t time_date;
struct tm *current_date;

time_date = time(NULL); // DOS system call
current_date = localtime(&time_date); // DOS system call
month = current_date->tm_mon + 1;
day = current_date->tm_mday;
year = current_date->tm_year + 1900;
format = 1;
}


// Set the date to these input parameters
// if return = 0 ---> All data is valid
// if return = 1 ---> Something out of range
int date::set_date(int in_month, int in_day, int in_year)
{
int temp = 0;
int max_days;
// The limits on the year are purely arbitrary
if (in_year < 1500) { // Check that the year is between
year = 1500; // 1500 and 2200
temp = 1;
} else {
if (in_year > 2200) {
year = 2200;
temp = 1;
} else
year = in_year;
}

if(in_month < 1) { // Check that the month is between
month = temp = 1; // 1 and 12
} else {
if (in_month > 12) {
month = 12;
temp = 1;
} else
month = in_month;
}

max_days = days_this_month();
if (in_day < 1) { // Check that the day is between
day = temp = 1; // 1 and max_days
} else {
if (in_day > max_days) {
day = max_days;
temp = 1;
} else
day = in_day;
}

return temp;
}



static char *month_string[13] = {" ", "Jan", "Feb", "Mar", "Apr",
"May", "Jun", "Jul", "Aug",
"Sep", "Oct", "Nov", "Dec"};

// Return Jan Feb Mar Apr etc.
char *date::get_month_string(void)
{
return month_string[month];
}



// Return an ASCII-Z string depending on the stored format
// format = 1 Aug 29, 1991
// format = 2 8/29/91
// format = 3 8/29/1991
// format = 4 29 Aug 1991 Military time
// format = ? Anything else defaults to format 1
char *date::get_date_string(void)
{
switch (format) {
// This printout assumes that the year will be
// between 1900 and 1999
case 2 : sprintf(out_string, "%02d/%02d/%02d",
month, day, year - 1900);
break;

case 3 : sprintf(out_string, "%02d/%02d/%04d",
month, day, year);
break;

case 4 : sprintf(out_string, "%d %s %04d",
day, month_string[month], year);
break;

case 1 : // Fall through to the default case
default : sprintf(out_string, "%s %d, %04d",
month_string[month], day, year);
break;
}
return out_string;
}



int days[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

// Since this is declared in the private part of the class
// header is is only available for use within the class.
// It is hidden from use outside of the class.
int date::days_this_month(void)
{
if (month != 2)
return days[month];

if (year % 4) // Not leap year
return 28;
if (year % 100) // It is leap year
return 29;
if (year % 400) // Not leap year
return 28;
return 29; // It is leap year
}


  3 Responses to “Category : C++ Source Code
Archive   : CPPTUT.ZIP
Filename : DATE.CPP
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/