setdate() in c

setdate()
Gets or sets DOS system date
Declaration:
void setdate(struct date *datep);
Remarks:
setdate sets the system date to the date in *datep.
Return Value:
getdate: None
On success, returns 0
Otherwise, returns a non-zero value and
sets errno to EINVAL (Invalid date)

Program

#include <stdio.h> #include <process.h> #include <dos.h> int main(void) {    struct date reset;    struct date save_date;    getdate(&save_date);    printf("Original date:\n");    system("date");    reset.da_year = 2001;    reset.da_day = 1;    reset.da_mon = 1;    setdate(&reset);    printf("Date after setting:\n");    system("date");    setdate(&save_date);    printf("Back to original date:\n");    system("date");    return 0; }

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