Program a simple clock in C

Question

Write a program to simulate simple digital clock displaying

HOURS(s) : MINUTES(s): SECOND(s)

How to get local system time ?
How to split local system time into hours , minutes and seconds ?

Edit 1:

This is what I have tried, but its far from perfect (dosnt even use time.h)

     #include <stdio.h>
     #include <conio.h>
     #include <dos.h> void main() { int h,m,s; h=0; m=0; s=0; while(1) {

     if(s>59) {m=m+1; s=0; } 
      if(m>59) { h=h+1; m=0; } 
      if(h>11) { h=0; m=0; s=0; } 
      delay(1000); 
      s=s+1; 
      clrscr(); 
      printf("\n DIGITAL CLOCK");
      printf("\n HOUR:MINUTE:SECOND"); 
      printf("\n%d:%d:%d",h,m,s); 
}

}

What have you tried? Do you have some notes that discuss the time functions in the C standard library? — tinman, Nov 28 '11 at 11:18
@Failed_noob: post the code that you have written so far - that way you get help fixing it — Paul R, Nov 28 '11 at 11:28

Jan Vorcak · Accepted Answer · 2011-11-28T11:36:26.567

7

How to get local system time ? How to split local system time into hours , minutes and seconds ?

time.h

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

int main(void) {

    time_t rawtime;
    struct tm*  time_;

    time(&rawtime);
    time_ = localtime(&rawtime);

    printf("%i:%i:%i %i %i %i\n", time_->tm_hour, time_->tm_min, 
            time_->tm_sec, time_->tm_mday, time_->tm_mon+1,
            time_->tm_year+1900);

    return 0;
}

Why did I do +1900 and +1 you can read here

edited Nov 28 '11 at 11:36

answered Nov 28 '11 at 11:19

Jan Vorcak

19,261
14
54
90

already repaired, btw you should really look at the documentation I posted, you learn nothing without it, if you are not able to write a function that shows time when you see a function which shows date ... that means you don't want to think, just to copy the result – Jan Vorcak Nov 28 '11 at 11:37

score 3 · Answer 2 · answered Nov 28 '11 at 11:18

3

from wikipedia: C date and time functions

answered Nov 28 '11 at 11:18

Adrien Plisson

22,486
6
42
73

score 1 · Answer 3 · answered Jan 11 '17 at 13:25

1

You can use this simplest code to get the above problem done.

#include <stdio.h>
int main()
{
 printf("%s %s",__TIME__,__DATE__);
 return 0;
 }

answered Jan 11 '17 at 13:25

Chandan Mahori

21
3

I don't like this method because it lacks control. **However** as you say it gets the job done and is easy. – Xantium Oct 09 '17 at 17:36

score 1 · Answer 4 · answered Nov 28 '11 at 11:59

1

Do a " man localtime() " . Try to figure out the structure being passed to the function and the return values . Till u write yourself you wont learn . Dont copy paste from above and submit ur homework :)

answered Nov 28 '11 at 11:59

amatuerCprogrammer

73
1
7

score 0 · Answer 5 · edited Dec 24 '18 at 16:57

0

#include<stdio.h>
#include<conio.h>
int main(void)

{
    clrscr();
    int h = 0, m = 0, s = 0;
    printf("Digi_Clock \n");
    printf("Enter time (hh : mm : ss) \n");
    scanf(" %d %d %d", &h, &m, &s);

start:;

    for (h; h <= 24; h++) {
        for (m; m <= 60; m++) {
            for (s; s <= 60; s++) {
                clrscr();

                printf(" %d : %d : %d \n", h, m, s);

                for (double i = 0; i <= 6699000; i++) {
                    i++;
                    i--;
                }
            }
            s = 0;
        }
        m = 0;
    }

    goto start;
    getch();
}

edited Dec 24 '18 at 16:57

HMD

2,202
6
24
37

answered Dec 24 '18 at 15:23

Ramses

1

While this code snippet may be the solution, [including an explanation](//meta.stackexchange.com/questions/114762/explaining-entirely-‌code-based-answers) really helps to improve the quality of your post. Remember that you are answering the question for readers in the future, and those people might not know the reasons for your code suggestion. – HMD Dec 24 '18 at 15:49

Program a simple clock in C

5 Answers5

Linked