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List:       aix-l
Subject:    Re: Question re days between dates
From:       Silvio Bandeira <silvio () DEI ! UNICAP ! BR>
Date:       2000-05-31 21:48:58
[Download RAW message or body]

See the attached files. The executable was built in AIX 4.2.1. The source is
available in "dates.c"

Chris Brett wrote:

> All,
>
> We have a need to obtain execute a piece of code which accepts two input
> parameters  ( start date & end date ) in the format yyyymmdd and we want as
> output a string showing all the dates inbetween the two dates including the
> start and end  dates  ( same format)  separated by white space.
>
> Regards
>
> Chris Brett
> Technical Systems Analyst
> Tel:02-6055-1121;  Fax:02-6056-2169; e-mail:chris.brett@ap.effem.com

--
Silvio Bandeira
UNICAP - Dept. of Computer Science



["dates" (application/octet-stream)]
["dates.c" (text/plain)]

#include <stdlib.h>
#include <stdio.h>
#include <time.h>

time_t t1=0,t2;
struct tm *ptm;

main(int argc, char *argv[])
{
    if (argc != 3) {
        fprintf(stderr, "Usage: %s first_date last_date\n", argv[0]);
        exit(0);
    }

    ptm = localtime(&t1);
    ptm->tm_hour = ptm->tm_min = ptm->tm_sec = 0;

    ptm->tm_mday = atoi(&argv[1][6]);
    argv[1][6] = '\0';
    ptm->tm_mon = atoi(&argv[1][4]) - 1;
    argv[1][4] = '\0';
    ptm->tm_year = atoi(&argv[1][0]) - 1900;
    t1 = mktime(ptm);

    ptm->tm_mday = atoi(&argv[2][6]);
    argv[2][6] = '\0';
    ptm->tm_mon = atoi(&argv[2][4]) - 1;
    argv[2][4] = '\0';
    ptm->tm_year = atoi(&argv[2][0]) - 1900;
    t2 = mktime(ptm);

    for(;t1 <= t2; t1 += 86400) {
        ptm = localtime(&t1);
        printf("%04d%02d%02d ",(ptm->tm_year + 1900), (ptm->tm_mon + 1), ptm->tm
_mday);
    }
    exit(0);
}


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