c time

1/* localtime example */
2#include <stdio.h>
3#include <time.h>
4
5int main ()
6{
7  time_t rawtime;
8  struct tm * timeinfo;
9
10  time ( &rawtime );
11  timeinfo = localtime ( &rawtime );
12  printf ( "Current local time and date: %s", asctime (timeinfo) );
13  
14  return 0;
15}
16

1#include <time.h>
2#include <stdlib.h>
3#include <stdio.h>
4
5int main(void)
6{
7    time_t current_time;
8    char* c_time_string;
9
10    /* Obtain current time. */
11    current_time = time(NULL);
12
13    if (current_time == ((time_t)-1))
14    {
15        (void) fprintf(stderr, "Failure to obtain the current time.\n");
16        exit(EXIT_FAILURE);
17    }
18
19    /* Convert to local time format. */
20    c_time_string = ctime(¤t_time);
21
22    if (c_time_string == NULL)
23    {
24        (void) fprintf(stderr, "Failure to convert the current time.\n");
25        exit(EXIT_FAILURE);
26    }
27
28    /* Print to stdout. ctime() has already added a terminating newline character. */
29    (void) printf("Current time is %s", c_time_string);
30    exit(EXIT_SUCCESS);
31}
32

1/** A working clock of time and date
2   that using your own computer's
3   local time to run the clock
4   without setting the time and date
5   in the code itself.               **/
6
7//C libraries statement
8#include <stdio.h>
9#include <stdlib.h>
10#include <time.h>
11
12//Programming the delay command
13void delay(int secondsNumber)
14{
15	int milliSecondsNumber = 1000 * secondsNumber;
16	clock_t startTime = clock();
17	while(clock() < startTime + milliSecondsNumber);
18}
19
20//Driver program
21int main(void)
22{
23	//Declaring the variable
24	char buff[100];
25	
26	//Making the clock run forever
27	for(; ;)
28	{
29		//Seting the clock over your computer local time
30		time_t now = time(0);
31		strftime(buff, 100, " %H:%M.%S \n %d/%m/%Y", localtime(&now));
32		
33		//Cleaning the command line and printing the clock
34		system("cls");
35		printf("\n %s\n", buff);
36		
37		//Seting a delay of one second between each print
38		delay(1);
39	}
40}
41
42///The code itself without the details:
43
44#include <stdio.h>
45#include <stdlib.h>
46#include <time.h>
47
48void delay(int numOfSec)
49{
50	int numOfMilliSec = 1000 * numOfSec;
51	clock_t startTime = clock();
52	while(clock() < startTime + numOfMilliSec);
53}
54
55int main(void)
56{
57	char buff[100];
58	
59	for(; ;)
60	{
61		time_t now = time(0);
62		strftime(buff, 100, " %H:%M.%S \n %d/%m/%Y", localtime(&now));
63		
64		system("cls");
65		printf("\n %s\n", buff);
66		
67		delay(1);
68	}
69}