1.c

static void error_handler(long long sec, char msg1[], char msg2[])
{
	long long curtimetick, flagtick;
	curtimetick = clock();
	flagtick = curtimetick / CLOCKS_PER_SEC;
	system("cls");
	printf("\n\n\n\n\n\n\n\n\n\n"); printf("\t\t\t\t\t#   ");  printf("%s\n", msg1);
	printf("\t\t\t\t\t#   "); printf("%lld초 안에 %s\n", sec - (clock() - curtimetick) / CLOCKS_PER_SEC, msg2);
	while ((clock() - curtimetick) / CLOCKS_PER_SEC < sec) {
		if (flagtick != (clock() - curtimetick) / CLOCKS_PER_SEC) {
			flagtick = (clock() - curtimetick) / CLOCKS_PER_SEC;
			system("cls");
			printf("\n\n\n\n\n\n\n\n\n\n"); printf("\t\t\t\t\t#   "); printf("%s\n", msg1);
			printf("\t\t\t\t\t#   "); printf("%lld초 안에 %s\n", sec - (clock() - curtimetick) / CLOCKS_PER_SEC, msg2);
		}
	}
	system("cls");
	return;
}