How to Find a current day in c language? - c

Question

I am able to get the current date but the output is like 9/1/2010,but my requirement is to get the current day like"Wednesday" not in form of integer value like 1.
My code is here.
#include <dos.h>
#include <stdio.h>
#include<conio.h>
int main(void)
{
struct date d;
getdate(&d);
printf("The current year is: %d\n", d.da_year);
printf("The current day is: %d\n", d.da_day);
printf("The current month is: %d\n", d.da_mon);
getch();
return 0;
}
Please help me to find the current day as Sunday,Monday.........
Thanks

Answer 1

Are you really writing for 16-bit DOS, or just using some weird outdated tutorial?
strftime is available in any modern C library:
#include <time.h>
#include <stdio.h>
int main(void) {
char buffer[32];
struct tm *ts;
size_t last;
time_t timestamp = time(NULL);
ts = localtime(&timestamp);
last = strftime(buffer, 32, "%A", ts);
buffer[last] = '\0';
printf("%s\n", buffer);
return 0;
}
http://ideone.com/DYSyT

Answer 2

The headers you are using are nonstandard. Use functions from the standard:
#include <time.h>
struct tm *localtime_r(const time_t *timep, struct tm *result);
After you call the function above, you can get the weekday from:
tm->tm_wday
Check out this tutorial/example.
There's more documentation with examples here.
As others have pointed out, you can use strftime to get the weekday name once you have a tm. There's a good example here:
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
int
main(int argc, char *argv[])
{
char outstr[200];
time_t t;
struct tm *tmp;
t = time(NULL);
tmp = localtime(&t);
if (tmp == NULL) {
perror("localtime");
exit(EXIT_FAILURE);
}
if (strftime(outstr, sizeof(outstr), "%A", tmp) == 0) {
fprintf(stderr, "strftime returned 0");
exit(EXIT_FAILURE);
}
printf("Result string is \"%s\"\n", outstr);
exit(EXIT_SUCCESS);
}

Answer 3

Alternatively, if you insist on using your outdated compiler, there's a dosdate_t struct in <dos.h>:
struct dosdate_t {
unsigned char day; /* 1-31 */
unsigned char month; /* 1-12 */
unsigned short year; /* 1980-2099 */
unsigned char dayofweek; /* 0-6, 0=Sunday */
};
You fill it with:
void _dos_getdate(struct dosdate_t *date);

Answer 4

Use struct tm Example

Answer 5

strftime is certainly the right way to go. Of course you could do
char * weekday[] = { "Sunday", "Monday",
"Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"};
char *day = weekday[d.da_day];
I'm of course assuming that the value getdate() puts in the date struct is 0-indexed, with Sunday as the first day of the week. (I don't have a DOS box to test on.)