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#if 0
exec cc -Wall -Wextra -pedantic $@ -o $(dirname $0)/clock $0
#endif
#include <time.h>
#include <stdio.h>
#include <sysexits.h>
#include <err.h>
int main() {
time_t timestamp = time(NULL);
if (timestamp < 0) err(EX_OSERR, "time");
struct tm *clock = localtime(×tamp);
if (!clock) err(EX_OSERR, "localtime");
int hour = clock->tm_hour;
int next = clock->tm_hour + 1;
switch ((clock->tm_min + 3) / 6) {
case 0: printf("....%02d....\n", hour); break;
case 1: printf("...%02d.....\n", hour); break;
case 2: printf("..%02d......\n", hour); break;
case 3: printf(".%02d.......\n", hour); break;
case 4: printf("%02d........\n", hour); break;
case 5: printf("%d........%d\n", hour % 10, next / 10); break;
case 6: printf("........%02d\n", next); break;
case 7: printf(".......%02d.\n", next); break;
case 8: printf("......%02d..\n", next); break;
case 9: printf(".....%02d...\n", next); break;
case 10: printf("....%02d....\n", next); break;
}
return 0;
}
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