C program to print the current local time to standard output.

.gitignore

local-time

local-time.c

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

#define TIME_STRING_LENGTH 23

int main(void) {
  time_t currentTime;
  char currTimeStr[TIME_STRING_LENGTH];
  struct tm* tmInfo;

  /* Obtain current time as seconds elapsed since the Epoch. */
  time(&currentTime);
  tmInfo = localtime(&currentTime);

  strftime(currTimeStr, TIME_STRING_LENGTH, "[%Y-%m-%d %H:%M:%S] ", tmInfo);
  printf("%s\n", currTimeStr);
  printf("%ld\n", strlen(currTimeStr));

  return 0;
}

Makefile

TARGET := local-time

$(TARGET): local-time.c
	gcc -Werror -Wall -O2 -o $@ $<

run: $(TARGET)
	@./$(TARGET)

clean:
	$(RM) $(TARGET)

.PHONY: run