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C Exercises: Show the start of the epoch

C Date Time: Exercise-10 with Solution

Write a program in C to show the start of the epoch.

Note : epoch means the beginning of a period in the history of someone.

Sample Solution:

C Code:

#include <stdio.h>
#include <time.h>
 
int main(void)
{
    time_t epoch = 0;
    printf("\n%ld seconds since the epoch began\n", (long)epoch);
    printf("%s\n", asctime(gmtime(&epoch)));
}

Sample Output:

0 seconds since the epoch began
Thu Jan 01 00:00:00 1970

Flowchart:

Flowchart: Show the start of the epoch

C Programming Code Editor:

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C Programming: Tips of the Day

How I can print to stderr in C?

The syntax is almost the same as printf. With printf you give the string format and its contents i.e.:

printf("my %s has %d chars\n", "string format", 30);

With fprintf it is the same, except now you are also specifying the place to print to:

File *myFile;
...
fprintf( myFile, "my %s has %d chars\n", "string format", 30);

Or in your case:

fprintf( stderr, "my %s has %d chars\n", "string format", 30);

Ref : https://bit.ly/3v5U8Zq