C Exercises: Print the current date and time
C Date Time: Exercise-1 with Solution
Write a program in C to print the current date and time.
Sample Solution:
C Code:
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
time_t cur_time;
char* cur_t_string;
cur_time = time(NULL);
if (cur_time == ((time_t)-1))
{
(void) fprintf(stderr, "Failure to get the current date and time.\n");
exit(EXIT_FAILURE);
}
cur_t_string = ctime(&cur_time); //convert to local time format
if (cur_t_string == NULL)
{
(void) fprintf(stderr, "Failure to convert the current date and time.\n");
exit(EXIT_FAILURE);
}
(void) printf("\n The Current time is : %s \n", cur_t_string);
exit(EXIT_SUCCESS);
}
Sample Output:
The Current date and time is : Thu Aug 03 13:38:58 2017
N.B.: The result may vary for your current system date and time.
Flowchart:
C Programming Code Editor:
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C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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